IEC
Which Type fixture is scheduled to be installed in the bedrooms?
"A"
Which fixture Type is to be installed above the basin in the bathrooms?
"M"
The term "take-off" refers to ___.
"taking off" (counting) the number of electrical components shown on a set of plans
Where a 6' length of Type MC cable is used in Figure 208.4, support(s) ___ can be omitted.
#1, #2, and #3
Fixture wire on a 30-amp branch circuit is permitted to be ___.
#14 AWG and smaller
A steel metal cable tray that is to be used as an equipment grounding conductor, with conductors protected by a 100A circuit breaker, must have a cross-sectional area of ___ square inches.
.40
Per the NEC®, receptacles in the residence's crawlspace must have ___.
.GFCI protection
207.14 The wiring method is PVC. The minimum distance permitted beneath the sidewalk at Point A (from the bottom of the 4″ thick sidewalk to the top of the conduit) is ___ inches.
0
Using the standard calculation, the demand load for household electric ranges rated in excess of ___ kW is computed per NEC® Table 220.55.
1 3/4
Among the conductors listed below, all except ___ are permitted to be connected in parallel.
1 AWG
A 16 AWG fixture wire up to ___ feet is considered to be protected by a 20-amp overcurrent device.
100
For a one-family dwelling, the service disconnecting means shall have a rating of not less than ___ amperes, 3-wire.
100
If the boxes in the wall exceed 24″ horizontally but exceed a total of ___ square inches in the same cavity firestopping must be installed.
100
The water heater is ___.
100 gal. electric
Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs are 350 kcmil. The minimum wire bending space required at II is ___ inches. These lugs are NOT removable.
12
The minimum clearance above finished grade for overhead service conductors is ___ feet. The service is 120/240-volt, 3-ph, 4-wire. The span is over a sidewalk. The service drop uses quadruplex.
12
Conductors on poles shall be separated by at least ___ where not placed on racks or brackets.
12 inches
The parallel conductors in each phase or neutral shall ___.
1 only
Match the following nominal stud size to its actual size: 3/4" × 11/2"
1 × 2
A unit load of ___ volt-amperes per square foot shall be used when calculating the lighting load of a restaurant.
1.5
A unit load of ___ volt-amperes per square foot shall be used when calculating the lighting load of a restaurant.
1.5 2020 NEC: 220.12
What is not permitted to be used as an equipment grounding conductor?
10 feet of 1 inch flexible metal conduit
Match the following nominal stud size to its actual size: 11/2" × 111/4"
2 × 12
Match the following nominal stud size to its actual size: 11/2" × 11/2"
2 × 2
Match the following nominal stud size to its actual size: 1/2" × 31/2"
2 × 4
Match the following nominal stud size to its actual size: 11/2" × 51/2"
2 × 6
Match the following nominal stud size to its actual size: 11/2" × 71/4"
2 × 8
Refer to Figure 108.014. Where this kitchen is in a house, which receptacles are required to be GFCI protected?
2, 4, 11, 6, 7, 8 & 9 only
What is the minimum trade size RMC permitted to be installed between two panelboards that are 5 feet apart? The RMC will contain four 4/0 AWG conductors and one 4 AWG ground. All conductors are THHN/THWN.
21/2
The requirements for the minimum number of branch circuits in a dwelling is found in ___.
210.11
Refer to Figure 203.4. This 480/277-volt, 3Ø, 4-wire service supplies an attorney's office. The minimum clearance at is ___. The overhead conductors are quadruplex cable and this area is accessible to automobiles but not trucks.
12'
The minimum feeder-circuit conductor size, before the application of any adjustment or correction factors, shall have an allowable ampacity equal to or greater than the noncontinuous load plus ___ percent of the continuous load.
125
What is the maximum voltage between circuit conductors when using plug fuses?
125
What is the x-ray room number?
125
Where loads are likely to be ON for 8 hours, the computed load for sizing branch-circuit conductors and OCPDs must be calculated by multiplying the actual load by ___%.
125
What is the ampacity of a 1/0 TW copper conductor?
125 amps
A size ___ AWG equipment grounding conductor is contained in a nonmetallic-sheathed cable marked as 14 AWG.
14
According to the NEC®, the smallest size permitted for branch circuit conductors suitable for supplying other than cooking appliances is ___ AWG.
14
Conductors for SPDs shall not be smaller than ___ AWG copper.
14
Refer to Figure 130.107. The fewest number of AFCI circuit breakers that are required to be installed in Panel B is ___.
14
The minimum size conductor permitted in commercial buildings for branch circuits up to and including 2000 volts is ___ AWG.
14
The smallest permissible wire size for branch circuit conductors supplying other than cooking appliances is ___ AWG according to the NEC®.
14
Where a branch circuit is protected with a 15-amp circuit breaker, the smallest circuit conductors that can be installed are ___ awg copper.
14
In Informative Annex D, Example D1(a), one-family dwelling, what is the calculated load for neutral?
14,550 VA / 240 V = 61 A
On sheet A-1.0, which way is north?
147
A duplex receptacle installed on a 20-ampere branch circuit shall have a minimum ampere rating of ___.
15
Inside a 277/480-volt, 3-ph, 4-wire panelboard, a 1/0 conductor that is connected to a circuit breaker can carry ___ amps of current.
150
To serve a single load that will not operate more than 3 hours, 1 AWG conductors are installed. These branch circuit conductors can be protected by a circuit breaker with a rating no greater than ___ Amps.
150
How much current can each conductor carry? Six, current-carrying 250 kcmil conductors are run in a pipe that is located in a 129°F ambient temperature location? The 75°C OCPD terminations are far away from the high temp area.
176
No additional support is required for this installation (the earth can support the conduits) if the conduit length from the finish surface (dirt here) to the box is ___ inches or less.
18
RMC is the wiring method used for the illustration shown below. The conduits are threaded wrenchtight into the entries in the bottom of the "bell" box. No additional support is required for this installation (the earth can support the conduits) if the conduit length from the finish surface (dirt here) to the box is ___ inches or less.
18
Schedule 40 PVC is the wiring method installed beneath the grassy area shown above in Figure 207.15. A 120-volt circuit is fed from a 15-Amp GFCI breaker in the restaurant. The minimum dimension permitted for Y is ___ inches.
18
Underground service conductors that are not encased in concrete and that are buried ___ or more below grade shall have their location identified by a warning ribbon that is placed at least 12 inches above the underground installation.
18 inches
In a house, when laying out the wall receptacle locations in a bedroom, make sure that a receptacle is installed in any wall space ___ wide or greater.
2 feet (600 mm)
Concrete requires approximately ___ to reach its full strength.
28 days
What size is the domestic water line?
2″
The ceiling joists are which board length/width?
2″ × 6″ × 24′
How many bedrooms are to be built?
3
How many different types of lighting fixtures are called out for the site lighting?
3
How may receptacles are shown on the exterior?
3
LFNC is the wiring method to be used above in Figure 208.3. The maximum distance permitted between support #1 and support #2 is ___ feet.
3
A two-gang box contains two 12/2 AWG w/ground NM cables connected to a duplex receptacle and two 14/2 AWG w/ground NM cables connected to a single-pole switch. The two-gang box also contains four clamps. What MINIMUM cubic inch volume does the box require?
30 cu. in.
The minimum working clearance at Point X in Figure 201.15 is ___ feet. The panel is 277/480-volt, 3Ø, 4W.
3 1/2
The Code recommends a voltage drop no greater than ___ percent for feeders and no greater than ___ percent total for feeders and branch circuits together.
3 5
If the window is openable, the minimum clearance at C in Figure 203.6 is ___.
3 feet
Refer to Figure 203.7. The minimum clearance at B is ___.
3 feet
A service lateral is to be installed as direct-buried cable in the bottom of a trench that is 42 inches below finish grade. The trench is to be filled with dirt only. A warning ribbon is required to be installed in the trench at a maximum depth of ___ inches below finish grade.
30
According to 240.4(D)(7), the largest circuit breaker that can be used to protect a circuit that uses 10 AWG conductors has a rating of ___ A.
30
When calculating the size of the required service, you should consult household electric clothes dryer demand factors given in Table ___.
220.54
What is the total length of the building?
225′ 0″
Which of the following is the spec division for HVAC? Select one:
23
Cabinets and cutout boxes shall be deep enough to allow the closing of the doors when ___-ampere branch-circuit panelboard switches are in any position, when combination cutout switches are in any position, or when other single-throw switches are opened as far as their construction permits.
30
For an installation consisting of not more than two 2-wire branch circuits, the service disconnecting means shall have a rating of not less than ___ amperes.
30
The use of the term SPD is becoming quite common and is addressed in NEC® Article ___.
242
Which of the following is the maximum number of current-carrying conductors that can be used at any cross section of a wireway without requiring the use of ampacity adjustment factors?
30
The calculated minimum height (top-to-bottom) of the pull box shown in Figure 208.53 is ___ inches. The conduits considered for this calculation contain conductors that enter this side and exit the adjacent side.
33
The minimum CALCULATED dimension for "width" shown in Figure 208.54 is ___ inches. All conductors enter the left side of the pull box and exit the bottom.
34
The NEC® states that contact of dissimilar metals be avoided where practicable. The Code reference that specifically permits steel threaded rigid couplings to be used with aluminum rigid metal conduit is ___.
344.14
Refer to Figure 201.20.. The wall opposite the 120/208-volt panelboard is sheetrock. The minimum clearance from the panelboard to the opposite wall is ___ inches.
36
Refer to Figure 201.21. The minimum clearance from the 120/208-volt panelboard to the opposite wall is ___ inches. The wall opposite the panelboard is made of CMUs (cement blocks).
36
In a bathroom in a house, at least one receptacle must be installed within ___ of the outside edge of each basin, and this receptacle must be located on the wall or partition adjacent to the basin.
36 inches
Which division will have specs for brick?
4
Which enclosure type would be suitable for indoor use which is subject to splashing water?
4
Which sheet number provides the plan for the site?
4
Fastened-in-place utilization equipment that is connected to a branch circuit with other loads shall not exceed ___ percent of the branch circuit rating.
50
In a 30-foot run of conduit containing one conductor the maximum cross-sectional area that can be occupied by the conductor is ___%.
53
The feeder conductor ampacity shall not be less than that of the service-entrance conductors where the feeder conductors carry the total load supplied by service-entrance conductors with an ampacity of ___ amperes or less.
55
The minimum headroom of the clear working space in front of a panelboard shall extend to ___ feet above the floor or the height of the panelboard, whichever is higher.
6′-6″
On sheet A-1.0, what is the room number for the mechanical room?
6″
What minimum standard size wireway, such as shown in Figure 208.61, is required to contain one hundred #8 THHN/THWN conductors?
6″ × 6″
In the reading, how many Divisions directly affect the electrician's scope of work for this residence?
7
Measured from the point in the box where the conductors emerge from the conduit in the back of the junction box, shown in Figure 207.13, the minimum length of the conductors is ___". The junction box has a depth (d) of 4" and is 6" wide by 6" high.
7
The maximum cross-sectional area that can be occupied by a conductor in a 40-foot run of conduit is 40% where the conduit contains ___ conductor(s).
7
For a feeder supplying household cooking equipment and electric clothes dryers, the maximum unbalanced load on the neutral conductor shall be considered as ___ of the load on the ungrounded conductors.
70%
What percent of a metal wireway cross section may be occupied by splices, taps, and conductors at any point?
75%
What is the insulation temperature rating of type THWN wire in a wet location?
75°C
Where installed in raceways, conductors of size ___ AWG and larger shall be stranded.
8
If the equipment terminals are listed for 75°C, what size THHN conductors are required for a 50 ampere circuit?
8 AWG
How many 12 AWG conductors are permitted to be put in a 411/16" × 11/2" square box?
9
How many light fixtures are required for the site lighting?
9
Refer to Figure 208.12, shown above. You will need at least ___ straps to support the conduit between enclosures A & B. Trade size 2 IMC with threaded couplings and connectors is used. You will cut and thread the conduit as required. The distance from enclosure A to B is 123 feet.
9
Which of the following could be used in a concrete slab?
EMT, LFMC, Schedule 40 PVC
What is the wall finish in the preparation areas?
FRP
Live vegetation, such as trees, may support overhead conductor spans.
False
Which drawings have sprinkler piping?
Fire Protection
Where do you find explanation for the symbols used on drawings?
Legend
What does LFNC stand for?
Liquidtight Flexible Nonmetallic Conduit
Which of the following conductor insulations is oil resistant?
MTW
Section 314.3 of the NEC® permits nonmetallic outlet and device boxes to be installed with which of the following?
Nonmetallic sheathed cable
A circuit breaker was installed so that pushing the handle UP or pulling the handle DOWN operates it. Pulling the handle DOWN turns the breaker ___.
OFF
Which of the following provides information for the circuiting to the receptacles and lights?
Panel schedule
Which of the following are permitted to be used to protect a GEC from physical damage?
RMC, EMT
The fire dampers in the Indoor Yard/Boarding room come from what unit?
RTU6
Electrical metallic tubing shall be constructed of any of the following except:
Red brass
RFP is the acronym for ___.
Request for Pricing
Which of the following conduits is not permitted to be used to protect a grounding electrode conductor from physical damage?
Schedule 40 PVC
Which of these trade size 11/4 raceways has the smallest cross-sectional area?
Schedule 80 PVC
This building style is typical for which part of the United States?
Southern
Which conductor material has a higher resistance?
AL
Drawing standards for symbols have been developed by ___.
ANSI
A 240-volt load, such as a window unit air conditioner, would require breaker ___ to be installed in the panelboard.
B bigger breaker
Which room is located in the NW corner of the building?
Bedroom #2
BIM is the acronym for ___.
Building Information Modeling
Which conductor has lower resistance?
CU
When doing voltage-drop calculations, where is the cross-sectional area in circular mils located?
Chapter 9, Table 8
Which chapters in the NEC® apply generally unless modified by latter chapters?
Chapters 1 through 4
A plot plan typically has what type of scale?
Civil
Which drawing type has the grading plan?
Civil
Which drawings usually show site lighting?
Civil
A requirement of electrical takeoff is providing the appropriate length of cable and ___ of each type and size for the job.
The light fixture plan for Room 306 contains ___ Type K luminaires.
When making up the branch circuit wires to the breakers in a newly installed panelboard, you found that some of the wires were cut too short. Does the NEC® permit any of these to be spliced with wire nuts so that another piece of wire can be added to be able to reach the breaker or the neutral bar?
Yes
Refer to Figure 108.010. This kitchen layout is in a restaurant. If a receptacle is installed in countertop space A, does the NEC® require it to be GFCI protected?
Yes
Refer to Figure 108.014. This kitchen is in a house. Does the NEC® permit receptacle 11 to be connected to one of the 20-amp small-appliance branch circuits?
Yes
___ is the practice of reviewing contract documents, including the prints and specifications, to determine the quantities of materials to be included in a bid.
Takeoff
Which of the statements below is an example of mandatory language used in the NEC®?
Terminals for more than one conductor and terminals used to connect aluminum shall be so identified.
Proper equipment grounding eliminates voltage that might cause an electric shock by ___.
eliminating potential differences between metal electrical enclosures
In vertical conduit runs, such as up through a high-rise building, conductors made of aluminum have support requirements that are ___ than for copper conductors.
farther apart
In Figure 210.8 the busbars in Panel I are ___ conductors.
feeder
Refer to Figure 210.7, shown above. The conductors between Panel A1-1 and the switch are ___ conductors.
feeder
FACP is the acronym for ___.
fire alarm control panel
The FACP shown in room 219 is ___.
fire alarm panel
Pages within a set of prints are numbered according to the type and convention. What is an example of a naming convention found within a set of prints?
fire protection
What is important when sealing a penetration in a fire rated wall?
fire rating of sealant
Steel framing compared to wood is?
fire resistant
Per NEC® Section 300.21, openings around electrical penetrations must be sealed using approved ___.
firestopping methods
The conductors and equipment required or permitted by this Code shall be acceptable only if ___.
approved
According to ___ in the NEC®, unused knockouts and other openings in electrical boxes and cabinets are required to be closed.
all of these
Electrical penetrations can be sealed with?
all of these
Examples of raceways would include ___.
all of these
Ground-fault protection is required for a feeder disconnect if ___.
all of these
Masonry can be used for:
all of these
The authority having jurisdiction has the responsibility ___.
all of these
On E-2, the F6 fixture is most likely ___.
an emergency light
The conductor shown at point IV in Figure 205.1 is
an equipment grounding conductor
In order that the connections inside an outlet box remain accessible, the NEC® permits a surface extension from a flush-mounted device box to be made by installing ___.
an extension ring -- shown here → -- with EMT connected to any knockout
If a fuse label is not marked with a fuse interrupting rating, the fuse size has ___.
an interrupting rating of 10,000 amps
When ___ touch together, this is a ground fault.
an ungrounded circuit conductor and the metal conduit
The NEC® allows ___ receptacle outlets to be connected on a 120-volt residential lighting or small-appliance branch circuit.
an unspecified number of
A wall-mounted luminaire, such as a sconce, that weighs 4 pounds is permitted to be mounted to and supported by a ___.
any of these
Insulated conductors used in wet locations shall ___.
any of these
When NM cable is run on the surface of ___ facing the attic, the cables require protection from physical damage by using substantial guard strips.
any of these
___ can be used to connect grounding conductors and bonding jumpers.
any of these
Cabinets and cutout boxes shall have ___ to accommodate all conductors installed in them without crowding.
approved space
Equipment and mechanical drawings are typically drawn by the ___.
architect
Typically, the ___ draws the equipment, mechanical, electrical, and plumbing plans.
architect
Per the NEC®, receptacles that are installed outdoors at a fast food establishment ___ required to be GFCI protected. These are accessible to the public.
are
Where a conduit passes through an exterior wall and enters a panel mounted on the interior, seals or plugs ___ required.
are
FS, FD, and larger cast or sheet metal boxes ___ classified as conduit bodies.
are not
Generally, circuit breakers ___ permitted to be connected to a neutral conductor.
are not
A 23-foot long hallway is shown above in Figure 108.020. If this hallway is in the Mayor's house, how many wall receptacles are required by the NEC®?
at least one
In a dwelling, how many 20-amp branch circuits are required by the NEC® to supply power to an area where a clothes washing machine is to be plugged into a receptacle?
at least one
Equipment intended to interrupt current at fault levels shall have an interrupting rating at nominal circuit voltage sufficient for the current that is available ___.
at the line terminals of the equipment
Match the following symbol with the term: Thermostat
b.
___ fittings and enclosures shall be permitted to be used with IMC.I. Steel II. Aluminum
both
Overcurrent protective devices shall be so selected and coordinated as to permit the circuit protective devices used to clear a fault without the occurrence of extensive damage to the electrical components of the circuit. This fault shall be assumed to be ___. I. between any circuit conductor and the equipment grounding conductor(s) or enclosing metal raceway II. between two or more of the circuit conductors
both I and II
Covers of outlet boxes and conduit bodies having holes through which flexible cord pendants may pass shall be provided with approved ___ or shall have smooth, well-rounded surfaces upon which the cord may bear.
bushings
Match the following symbol with the term: GFCI
c.
Which type of anchors use pressure to force the anchor in place?
compressed gas anchors
Type UF cable is permitted in which location?
corrosive environments
In completed installations, each outlet box shall have a ___.
cover
What does PEX stand for?
crossliked polyethylene
What is used to elevate the RTU off of the roof?
curb
Match the following symbol with the term: Single Pole Switch
d.
Where it is unlikely that two dissimilar loads will be in use simultaneously, it shall be permissible to ___ of the two in computing the total load of a feeder.
omit the smaller
What document is used for final construction items?
pick list
Which foundation type is used when soil conditions change?
pier and beam
Constructed, protected, or treated so as to prevent rain from interfering with the successful operation of the apparatus under specified test conditions is considered ___.
rainproof
Generally, circuit breakers must be ___.
readily accessible
All cut ends of rigid conduit shall be ___.
reamed
For this project, electrical specifications on the plumbing plans call for use of ___.
rigid or PVC
What is the actual name for a "Witch's Hat"?
roof jack
What is ductwork typically made of?
sheet metal
In walls or ceilings constructed of ___, it is acceptable to have the front edge of the box set back as much as 1/4 inch from the finish surface.
sheetrock
SCCR is the acronym for ___.
short circuit current rating
When balancing a 3-wire circuit, from a single-phase 230/115-volt system, the neutral conductor ___.
should carry the unbalanced current in each ungrounded conductor
What is not a factor when calculating voltage drop?
size of the conduit
Which is a very low-cost foundation type?
slab on grade
A "live load" is a load that is expected to change. An example of a live load is ___.
snow or ice accumulation
From the equipment schedule on sheet 9, what does the EC install?
hand dryers
From the equipment schedule on sheet 9, what does the EC supply?
hand dryers
Which type of jobsite condition may increase electrical labor and installation costs?
high ceilings
For messenger-supported wiring, open wiring on insulations, or concealed knob-and-tube wiring, the conductors shall enter the box though ___.
individual holes
Where conductors carrying alternating current are installed in metal enclosures or metal raceways, they shall be arranged so as to avoid heating the surrounding metal by ___.
induction
The equipment plan lists each piece of equipment ___.
in numerical order
Type TC power and control cable may be used ___.
in outdoor locations when supported by a messenger cable
NEC® Section 110.9 requires that electrical equipment ___.
intended to interrupt fault current be so rated
A receptacle is to be installed outside on the exterior wall of a doctor's office building. This receptacle ___ required to be GFCI protected.
is
When connections are made in the white wire to receptacles in a multiwire branch circuit, they are required to be
made with a pigtail to the silver terminal
Feeder and service-entrance conductors with demand loads determined by 220.82 are permitted to have the ___ load determined by 220.61.
neutral
The foundation that uses poured concrete beams is?
structural concrete
Raceways on exterior surfaces of buildings shall be arranged to drain and shall be ___ for use in wet locations.
suitable
A grounded circuit conductor shall be permitted to ground noncurrent-carrying metal parts of equipment on the ___ or within the enclosure of the ac service-disconnecting means.
supply side
Transient voltage surge suppressor (TVSS) is an outdated term that has been replaced with the term ___.
surge protective device (SPD)
Conductors with thermoplastic and fibrous outer braid Type TBS insulation are used for wiring ___.
switchboards only
Branch circuits are rated according to ___.
the ampere rating of the overcurrent device
NEC® Section 250.118 permits ___ to be used as an equipment grounding conductor.
the armor of Type AC cable
When overcurrent devices are selectively coordinated and a fault occurs somewhere on a branch circuit, what should happen?
the branch circuit OCPD that is nearest the fault should open
Conductors supplying more than one receptacle for cord-and-plug connected portable loads shall have an ampacity of not less than ___.
the branch circuit rating
Which schedule is the most important for the electrician?
the panel schedule
TD is the acronym for ___.
trench drain
In light frame construction, steel may be used as ___.
structural beams
The depth where water is found is called ___.
water table
Concrete is a porous material and requires waterproofing. Which technique below is not a waterproofing method?
waterproof putty
Section 110.14(C) states: "Conductors with temperature ratings higher than specified for terminations shall be permitted to be used for ampacity adjustment, correction, or both." This means that when an ampacity correction for a THHN/THWN conductor is required due to temperature, the corrected ampacity is calculated by multiplying the ampacity listed in the 90°C column (typically from Table 310.16 times the correction factor.) This is a ___ statement because a THHN/THWN conductor has a maximum temperature rating of ___.
true 90°C
Which of the following may not be used in damp or wet locations?
type AC armored cable
A use for steel found predominantly in commercial construction is?
web bar joist
Which of the following about the equipment grounding conductor is true?
I, II & III
Which drawings have air conditioning?
Mechanical
Who completes the electrical work for heat?
Mechanical
MEP is the acronym for ___.
Mechanical, Electrical, and Plumbing
For this project, Division 15 is for ___.
Mechanical, Plumbing, and HVAC
207.8
a
What is the General Liability Insurance requirement?
$1,000,000
An electrician needs to install a surface mounted, nonmetallic, weatherproof cabinet on the outside of a concrete block building. Since the cabinet must be mounted in a wet location, it must be mounted so there is at least ___ inch(es) of airspace between the cabinet and the wall.
0
How many days are provided for time extensions?
0
Per the NEC® the number of receptacles required in an IEC classroom is ___. The room dimensions are 36 feet × 24 feet with a 3-foot wide door at the far end of one of the 36-foot long walls. Nobody lives there!
0
A cabinet or cutout box is constructed of sheet steel, the metal thickness shall not be less than ___ inch uncoated.
0.053
When a calculation results in a fraction of an ampere of ___ or more, the NEC® permits "rounding up" to the next ampere.
0.50
A fixture stud in a box is considered the equivalent of how many conductors?
1
A very long branch circuit has been installed underground in Schedule 40 PVC. The circuit extends from a 120/208-volt, 3-phase, 4-wire panelboard to the load. The branch circuit conductors are connected to a 20-A circuit breaker in the panel. Due to voltage drop considerations, 1 AWG circuit conductors have been installed. The smallest EGC that can be installed in the PVC is ___ AWG or kcmil.
1
How many receptacles are to be installed in EACH bathroom?
1
The minimum trade size EMT required is ___. This is a run that is 45′ long. The following conductors will be installed: four-#12 THHN/THWN + three-#10 THHN/THWN + two-#6 THHN/THWN.
1
What is the minimum number of 120-volt receptacles required in a dwelling laundry room?
1
What is the smallest size standard fuse?
1
Where installed in a 3-pole, 600-volt fused safety switch, the minimum number of fuses required to protect a 120-volt, 1-ph, 2-wire branch circuit is ___.
1
Which sheet number depicts the electrical installation?
1
When calculating the size of a service, signs shall be calculated at a minimum of ___ volt-amperes for each required sign circuit.
1,200
Laundry receptacle outlets are included in the residential load calculations at a value of ___ volt-amperes per circuit.
1,500
What size is the incoming gas pipe?
1.25″
XHHW 500 kcmil conductors have an insulation that is ___ mm thick.
1.65
According to Table 4 in the NEC® 21/2 inch FMC has a total area of 4.909 in2. A 12′ run of this flex can be filled with conductors for several circuits. However, the maximum area that can be occupied by the circuit conductors is ___ sq. in.
1.963
A 175-Amp breaker protects a feeder that originates in a 120/240-volt, 1-ph, 3-wire service panel in a residence. Which of the following conductors is the smallest size permitted for the feeder?
1/0
In no case shall conductors in a cablebus be smaller than ___ AWG.
1/0
No conductor larger than ___ AWG shall be installed in a cellular concrete floor raceway without special permission.
1/0
The minimum size THWN/THHN aluminum conductor permitted to serve a 95 amp load that will operate continuously is ___ AWG.
1/0
Which of the following THHN/THWN copper conductors is the smallest size permitted for a 150 A feeder to a subpanel for an addition to an existing dwelling? The feeder originates in the 120/240-volt, 1-ph, 3-wire service panel in a home.
1/0
Which of the following THHN/THWN copper conductors is the smallest size permitted for a feeder where a 150 A breaker protects the feeder? The feeder originates in the 120/240-volt, 1-ph, 3-wire service panel in a bakery.
1/0
Which of the following THHN/THWN copper conductors is the smallest size permitted for a feeder where a 150-A breaker protects the feeder? The feeder originates in the 120/208-volt, 3-ph, 4-wire service panel in a home.
1/0
Except by special permission, no conductor larger than ___ shall be installed in cellular metal floor raceways.
1/0 AWG
The smallest trade size EMT available that can be installed between two big pull boxes is ___.
1/2
Trade size 1/2 IMC and RMC use the same fittings. Which of them has the greater wall thickness?
1/2 RMC
What is the thickness of the gypsum board to be installed?
1/2"
Refer to Figure 208.14, shown above. The flexible wiring method between the time clock and the panel is permitted to be ___.
1/2″ LFNC and 1/2″ LFMC
A metal switch enclosure installed in a damp or wet location shall be spaced at least ___″ off the mounting surface.
1/4
A unit load of not less than ___ volt-amperes per square foot shall be included for storage spaces in other than dwellings.
1/4
Enclosures for overcurrent devices in damp or wet locations shall be identified for use in such locations and shall be mounted so there is at least ___ inch airspace between the enclosure and the wall.
1/4
In areas where the walls are frequently washed, conduit should be mounted with a ___ inch air space between the wall and the conduit.
1/4
The Code permits a ___″ maximum space between the panel enclosure ("can") and the panel cover as shown above in Figure 210.12.
1/4
In a wall made of noncombustible material, cabinets shall be installed so that the front edge of the cabinet is not set back from the finished surface more than ____.
1/4 inch
Where cables assemblies with nonmetallic sheathes are used, the seath shall extend not less than ___ inside the box and beyond any cable clamp.
1/4"
Where cables assemblies with nonmetallic sheathes are used, the seath shall extend not less than ___ inside the box and beyond any cable clamp.
1/4″
What is the scale of detail 3 on A-5.0?
1/4″ = 1′
Non combustible surfaces that are broken or incomplete shall be repaired so there will be no gaps or open spaces greater than ___ inch at the edge of the fitting or box.
1/8
The NEC® specifies that the maximum number of receptacles that can be connected to a 15-amp, 120-volt branch circuit in a school is ___.
10
The largest conductor permitted in 3/8″ flexible conduit is ___ AWG.
10
Each 480-volt, three-phase, wye-connected feeder disconnect with a minimum rating of ___ amperes is required to be ground-fault protected.
1000
Except where specifically referenced elsewhere in the Code, Article 312 does not apply to equipment operating at over ___volts.
1000
The current carried continuously in bare copper bars in auxiliary gutters shall not exceed ___ amperes per square inch.
1000
In what room is the water heater?
108A
The smallest (volume) junction box that can be used in the installation, shown above in Figure 208.33, is a ___. Conduits #1 and #4 each contain twenty-four 10 AWG wires. Conduits #2 and #5 each contain twelve 6 AWG wires. Conduits #3 and #6 each contain sixteen 8 AWG wires. All conductors are "wire nutted" inside the box. Additionally, each conduit contains a ground that is equal in size to the circuit conductors.
10″ × 10″ × 4″ deep
Refer to partial circuit plan shown in Figure 115.103. You are required to size the box that will contain a split-wired receptacle. If the cables entering this box were all #12 MC cables, what is the smallest 4″ square metal box that could be used here? The box will have a 1″-rise plaster ring installed that adds a volume of 6.1 in3 to the total volume. The MC cables will be connected to the box using external connectors. There are NO cable clamps within this box. Hint: Don't forget to count the wires for the device and the ground(s) that are in the MC cable.
11/2
A cable, raceway, or box, installed in exposed or concealed locations under metal-corrugated sheet roof decking, shall be installed and supported so there is not less than ___ measured from the lowest surface of the roof decking to the top of the cable, raceway, or box.
11/2 inch
What size conduit is required to the junction box near the register?
11/2″
Where a cable or raceway-type wiring method is installed through bored holes in joists, rafters, or wood members, holes shall be bored so that the edge of the hole is not less than ___ from the nearest edge of the wood member.
11/4 inch
NEC® Section ___ states the following. Conductors of dissimilar metals shall not be intermixed in a terminal or splicing connector where physical contact occurs between dissimilar conductors (such as copper and aluminum, copper and copper-clad aluminum, or aluminum and copper-clad aluminum), unless the device is identified for the purpose and conditions of use.
110.14
What is the power required for the exhaust fans?
115V, 1ph
What is the distance between the porch lights?
11′ 8″
MC cable is used to connect a 2 × 4 lay-in fluorescent luminaire to a "home run" box as shown in Figure 208.2. The length of the cable between the box and the luminaire is 26 feet. The maximum distance between the box and support #1 is ___.
12 inches
The nominal voltage of branch circuit conductors in a single-family dwelling shall not exceed ___ volts between conductors.
120
Determine the maximum current-carrying capacity for each conductor when four 1/0 AWG THW current-carrying copper conductors are installed in a common raceway with an ambient temperature of 86 degrees F.
120 amperes
What is the maximum allowable voltage between conductors on a branch circuit supplying lighting fixtures (luminaires) in a residence?
120 volts
Which of these panelboard installations requires a minimum of 900 mm (3 ft) working clearance in front of the panelboard? This is a Condition 2 installation.
120/208-volt, 3Ø, 4-wire
The load for a required sign branch circuit shall be computed at a minimum of ___.
1200 VA
If the allowable current rating of a busway is 1400 amps, what is the maximum allowable rating of the overcurrent protection device that may be used to protect the busway?
1200 amps
PVC shall not be permitted where subject to ambient temperature in excess of ___ degrees Farenheit unless listed otherwise.
122
How many inches OC (on center) are the studs to be installed?
16″
Refer to the Article 100 definition for continuous load in the NEC®. According to 210.19(A) the branch-circuit conductors for a continuous load shall be sized at not less than ___ of the current drawn by the load.
125%
At 180 VA per outlet, how many outlets can be installed on a 20-ampere circuit (120 volt) if the circuit loading is to remain within its ratings?
13
Vertical runs of metal wireways shall be securely supported at intervals not exceeding ___ feet and shall not have more than one joint between supports.
15
When the corrected ampacity of a 10 AWG copper conductor is 12.86 amps, the maximum size circuit breaker permitted to protect the conductors is ___.
15
Where 10 AWG THHN/THWN copper circuit conductors are connected to a 15-amp circuit breaker, the circuit is considered to be a ___-amp branch circuit.
15
In the reading, the timeframe for completing the electrical installations in this residence is ___.
150 days
What is the timeframe for completion of the Brick Veneer Residence?
150 days
What number is the electrical room?
152
What specification division for the Brick Residence includes the requirements for Electrical?
16
Which division will have specs for excavation?
16
Which specification section lists the type and quantity of circuits to be installed?
16.3.2
What is the circular mil area of a 3/0 AWG conductor?
167,800
What is the minimum demand load for general-purpose receptacles in an office building that has 150 receptacles?
18,500 VA
Refer to Figure 208.51. The minimum CALCULATED dimension for "height" is ___ inches. All conductors enter the right side of the pull box and exit the bottom. Conduit G = 2″ Conduit H = 21/2″ Conduit J = 11/2″Conduit K = 1″ Conduit L = 11/2″ Conduit M = 2″ Conduit N = 2″
181/2
How many SPST switches for lighting are depicted?
19
The maximum temperature rating of a THHN conductor is ___°F in a dry location.
194
Armored cable installed in thermal insulation shall have conductors rated at ___. The ampacity of cable installed in these applications shall be that of 60 degree C conductors.
194 degrees F
The civil plan for the Wendy's restaurant shows a scale of ___.
1:20
If we are roughing in a wall with 3/4″ gypsum and the mounting bracket has a setback of 1/4″, what depth plaster ring would be required to ensure our installation would be flush to drywall surface?
1″
What size conduits are required to the menu board?
1″
For the Wendy's project, what is the scale on the civil drawings?
1″ = 20′
For a dwelling the fewest number of receptacles required to be installed outdoors per the NEC® is ___.
2
How many 12/2 AWG with ground, type NM cables are permitted to be installed in an outlet box that is 18 cubic inches and has a duplex receptacle installed in the box?
2
How many Type "B" fixtures are to be installed in the hallway?
2
How many bathrooms are being built?
2
How many cavities does a typical masonry block contain?
2
How many circuits are to remain as spares?
2
In an unfinished basement area with laundry facilities, how many receptacles are required?
2
Nonmetallic surface extensions with one or more extensions shall be permitted to be run in any direction from an existing outlet, but not on the floor or within ___ inches from the floor.
2
Type AC cable shall be permitted to be unsupported where the cable is not more than ___ feet in length at terminals where flexibility is necessary.
2
What is the minimum number of 20-ampere branch circuits for small appliances required in a residence?
2
What is the minimum trade size EMT permitted to be installed between two junction boxes that are 5 inches apart? The EMT will contain thirty-four 8 AWG, twenty 12 AWG, nine 6 AWG, and one 10 AWG THHN/THWN copper conductors.
2
What is the minimum trade size RMC permitted to be installed between two panelboards that are 5 inches apart? The RMC will contain four 4/0 AWG conductors and one 4 AWG ground. All conductors are THHN/THWN copper.
2
Which sheet depicts the detail for the East elevation?
2
What is the cubic-inch allowance for a 10 AWG conductor?
2.50
For a 200-A residential service, the smallest service conductors permitted by the NEC® are ___ AWG THHN/THWN.
2/0
What size copper wire should be installed for the service?
2/0
A ___-amp circuit breaker is the largest that can be installed on a 12 AWG copper circuit conductor. The circuit is connected to several receptacles.
20
A single receptacle installed on a 20-ampere 120-volt circuit shall have an ampere rating of
20
In a dwelling, a living room branch circuit with a 20-ampere rating can be loaded to a maximum of ___ amperes.
20
Tap conductors for household cooking equipment not exceeding a 50-ampere branch circuit shall have an ampacity of not less than ___ amperes.
20
The NEC® requires two separate ___-ampere receptacle branch circuits for kitchens because cord-connected appliances used in residential kitchens (such as coffee makers, toasters, microwave ovens, and slow cookers) use a lot of current.
20
The minimum CALCULATED dimension for "width" shown in Figure 208.55 is ___ inches. Conduit G = 2″ Conduit H = 21/2″ Conduit J = 11/2″ Conduit K = 2″Conduit L = 1″ Conduit M = 11/2″ Conduit N = 2″
20
The minimum number of 15-amp, 120-volt, lighting circuits required for a 12,000 sq. ft. multifamily dwelling is ___.
20
The nominal gas pressure for IGS cable insulation shall be ___ pounds per square inch gauge.
20
Which of the following is not allowed to act as a concrete encased electrode?
20 feet of #6 AWG bare copper
Refer to Scenario 220.53. The secondary OCPD can have a rating no greater than ___ amps.
200
A 3/0 AWG conductor that is connected to a circuit breaker in a 120/240-volt, 3-ph, 4-wire panelboard can carry ___ amps of current inside the panel.
200 2020 NEC: 110.14(C)(1)(b)(1) | 2020 NEC: 310.16 (Table)
Where contained in a cable, the Code reference that states when a conductor with white insulation may be used as an ungrounded circuit conductor is in Section ___.
200.7(C)
Per the specifications, what size service is to be installed?
200A
What is the required electrical circuit for EF-1?
208V, 3ph
What power is required to all RTUs?
208V, 3ph
Arc-fault requirements for dwelling units are found in Section ___.
210.12
Guest suites of hotels with permanent cooking provisions shall be required to have AFCI protection for the bedrooms according to ___ in the NEC®.
210.12(C)
Code section ___ specifies that the total rating of "hard-wired" utilization equipment shall not exceed 7.5 amps for a 15-amp branch-circuit where lighting units, cord-and-plug-connected utilization equipment not fastened in place, or both, are also supplied. Select N/A (not applicable) if there is not a Code reference for this.
210.23(A)(2)
Table ___ of the NEC® gives the minimum wire sizes, based on circuit rating, that can be used for branch circuits with two or more outlets or receptacles.
210.24
Which of the following is the spec division for plumbing?
22
What Article of the NEC® covers the volt-ampere rating of multioutlet assemblies?
220
In dwelling units, receptacles supplying countertops in the dining room shall be installed so that no point along the wall is more than ___ inches to the nearest receptacle.
24
Refer to Figure 207.14. The wiring method is Type USE cable. The minimum distance permitted at Point B is ___ inches.
24
Refer to Figure 207.19, shown above, where luminaires have been installed along a driveway to a single-family ranch home. Type UF cable is the wiring method installed between the luminaires and along the side of the drive. The minimum dimension permitted for Y along the side of the driveway is ___ inches.
24
The maximum permitted current rating of a portable appliance on a 30-ampere branch circuit is ___ amps.
24
When conduit nipples having a maximum length not to exceed ___ inches are installed between boxes and similar enclosures, the nipples shall be permitted to be filled to 60% of their cross-sectional area.
24
What is the minimum distance apart boxes in the same wall cavity of a fire rated wall must be spaced to eliminate the need for firestopping? Select one:
24″
A 300-amp breaker supplies power to a 225 KVA 480 - 120/208-volt, 3Ø, 4-W transformer. The transformer feeds a panelboard with a 200-amp main breaker. The length of the secondary conductors between the transformer and the main is 13 feet. These conductors must be at least ___ in size.
250 kcmil
Round access openings in a manhole shall not be less than ___ inches in diameter.
26
Where a 14″ section of trade size 31/2 Schedule 40 PVC is installed between enclosures, no more than ___ 2/0 AWG THHN/THWN conductors can be installed.
26
Which of the following is the spec division for electrical?
26
Which of the following is the spec division for communications?
27
On A-1.2 how many roof top units (mechanical) are shown?On A-1.2 how many roof top units (mechanical) are shown?
3
One conduit is run from Panel LA to a pull box as shown in Figure 205.13. The 250-amp breaker has 250 kcmil circuit conductors connected to it, and 500 kcmil circuit conductors are connected to the 400-amp breaker. Only one grounding conductor is required in this conduit for all contained circuits. The smallest EGC permitted to be installed in the conduit between the panel and the pull box is ___ AWG.
3
Refer to Figure 201.15. The minimum working clearance at Point Z is ___ feet. The panel is 120/240-volt, 1Ø, 3W.
3
Refer to Figure 204.7. 300 kcmil conductors are installed between the 300-Amp breaker and Pull Box 2. The distance between Pull Box 2 and FD #1 is 12 feet. The nameplate on Load #1 indicates that it will draw 63 amps. The smallest size wire permitted for the tap conductors between Pull Box 2 and FD #1 (Fused Disconnect for Load #1) is ___ AWG. Don't forget that the switches have 75ºC lugs so you will select your wire from the 75ºC column.
3
What minimum size schedule 80 PVC conduit is required for a 65′ run? The conduit will contain three 350 kcmil, one 3/0, and one #2 THHN/THWN conductors.
3
Where the opening to an outlet, junction, or switch point is less than 8 inches in any dimension, each conductor shall be long enough to extend at least ___ inches outside the opening of the enclosure.
3
Which sheet depicts a typical wall detail? Select one:
3
Plywood is composed of which of the following?
3 or more plies of wood
For purposes of calculating a residential service, the general-purpose lighting load is calculated at ___ per square foot of area.
3 volt-amperes
The wiring method used in Figure 124.103 is 14 AWG MC cable. Which of the switch boxes listed below is the smallest you can use and not violate the NEC®? Note: Each cable DOES contain an EGC but for clarity the equipment grounding conductors are not shown in the drawing.
3 × 2 × 23/4
When installing more than two conductors in a 50 foot run of 3 inch intermediate metal conduit, the maximum area that can be filled with conductors is ___ square inches.
3.169
Schedule 40 PVC is to be installed in a straight run between two junction boxes on the back exterior wall of a strip shopping center. The summertime temperature is 100°F and the wintertime temperature is -5°F. An expansion fitting would be required in this 80′ run of PVC because it would expand ___ inches between winter and summer.
3.408
Which of the following conductors is the smallest size permitted for a feeder where a 200-Amp breaker protects the feeder? The feeder originates in the 120/208-volt, 3-ph, 4-wire service panel in a home.
3/0
The minimum thickness for a cast aluminum box measuring 6″ × 4″ × 31/2″ is ___ inches.
3/32
Where conduit is threaded in the field, a standard conduit cutting die with a ___ inch taper per foot shall be used.
3/4
A feeder needs to be installed to supply power to a load that will draw 800 amps. The circuit breaker will be rated at 800 amps. There will be 3 parallel conduits run for the feeder. You will need to install at least ___ AWG or kcmil conductors in each conduit.
300
In a 30-foot run of conduit containing two conductors the maximum cross-sectional area that can be occupied by conductors is ___%.
31
The minimum working clearance at Point X in Figure 201.15 is ___ feet. The panel is 120/240-volt, 3Ø, 4W.
31/2
The smallest standard size metal box that can be used for the following is a ___. one- 1/2″ romex (exterior) connector one- 14-2 w/ ground NM cable one- 20 amp 240 volt duplex receptacle one- PVC (exterior) connector two- 12 AWG conductors to be connected to the receptacle one- 12 AWG equipment grounding conductor two- 14 AWG conductors to be connected to the NM cable with wire nuts
31/2″ deep masonry box
Refer to Figure 208.51. The minimum CALCULATED dimension for "width" is ___ inches. All conductors enter the right size of the pull box and exit the bottom.Conduit G = 3" Conduit H = 31/2" Conduit J = 6"Conduit K = 3" Conduit L = 4" Conduit M = 2" Conduit N = 21/2"
311/2
Calculating and providing the proper volume of a box is not always enough. Section ___ of the NEC® states outlet and device boxes shall be deep enough so that conductors will not be damaged when installing wiring devices or equipment.
314.24
Section ___ of the NEC® permits nonmetallic outlet and device boxes to be installed with nonmetallic sheathed cable.
314.3
The calculated minimum width (left-to-right) of the pull box shown in Figure 208.53 is ___ inches.
37
An 8" x 8" x 5' gutter is shown in Figure 208.63. The maximum number of 4/0 AWG THWN/THHN conductors that can be installed in the gutter is ___.
39
The maximum number of 4/0 AWG THHN/THWN conductors that can be installed in an 8" x 8" wireway (a section is shown in Figure 208.61) is ___.
39
A 21/2″ rigid metal conduit enters the back of a pull box that has a removable cover on the opposite side. The raceway encloses four 4/0 AWG THHN copper conductors and one 4 AWG equipment grounding conductor. The minimum depth (distance from the entry wall to the cover) for this pull box is ___ inch(es).
4
Angle pull dimensional requirements apply to junction boxes only when the size of conductors is equal to or larger than ___ AWG.
4
How many circuits are designated for lighting?
4
Per the drawings, how many receptacles are to be installed in Bedroom #1?
4
Refer to Figure 205.14. Load 1 is supplied from a 150-A circuit breaker with 1 AWG conductors. Load 2 is supplied from a 300-Amp breaker with 4/0 AWG conductors. Both loads are 3-ph, 3-wire. Where only one grounding conductor is installed in the conduit between the panel and the pull box, its minimum size is ___ AWG.
4
Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs are 4/0 AWG. The minimum wire bending space required at I is ___ inches. These lugs are NOT removable.
4
The light fixture plan for Room 306 contains ___ Type K luminaires.
4
The minimum number of 120-volt, 15-amp lighting branch circuits required for a dwelling that has 70 × 30 ft. of livable space is ___.
4
Type ___ component assemblies and other component type SPDs shall only be installed by the equipment manufacturer.
4
Among the possible box assemblies the smallest permitted to contain the following is ___. Exterior MC cable connectors are used on the cables. One - 30 amp 240-volt single receptacle and One - 15 amp 120-volt single receptacle Two - 10/2 with ground MC cables plus One - 14/2 with ground MC cable
4 × 11/2 square box with a 5.0 cu. in. two-gang plaster ring
A feeder needs to be installed to supply power to a load that will draw 900 amps. The circuit breaker will be rated at 900 amps. There will be 4 parallel conduits run for the feeder. You will need to install at least ___ AWG or kcmil conductors in each conduit.
4/0
If we offer a VE (value engineered) option to the client, what size aluminum wire would we install for the service?
4/0
Conductor fill may be up to ___ percent of the cross-sectional area in underfloor raceways.
40
If festoon lighting exceeds ___ feet, the conductors shall be supported by messenger wire.
40
Overhead conductors for festoon lighting shall be supported by messenger wire in spans exceeding ___ feet.
40
Using the optional calculation method, four or more separately-controlled electric space-heating units are calculated at ___% of their nameplate ratings.
40
When calculating the conductor fill for strut-type channel raceway with external joiners, the raceway shall be permitted to be filled to ___ percent of the cross-sectional area.
40
Refer to the indoor installation shown in Figure 223.503. The conductors between the transformer and the line side of Switch #1 are 600 KCMIL. The largest fuses that can be installed in Switch #1 are ___ amp.
400
The cross-sectional area of a 4 AWG BARE copper conductor is ___ cmils.
41740
Refer to Figure 204.3. The wire to Load #3 is 6 AWG, the wire to Load #2 is 1 AWG, and the wire to Load #1 is 2/0 AWG. Each of the loads is 3Ø, 3-wire. In the conduit with 9 conductors, how much current can the wire to Load #3 carry in the high-temperature area where the temperature is 121°F?
43
Where two #18, three #16, two #14, three #12, two #10, three #8, and two #6 conductors are contained in a box, ___ cubic inches will be occupied in the box by these conductors.
43.00
The minimum CALCULATED dimension for "height" shown in Figure 208.54 is ___ inches. All conductors enter the left size of the pull box and exit the bottom.
44
Which of the following requires that a GFPE device be installed?
480/277-volt, 3Ø, 4-wire switchgear with a 1000-A main breaker
For a raceway containing 30 current carrying conductors, the ampacity of each conductor shall be reduced to ___ percent of that for a single conductor.
45
Given: A metal junction box has 27 cubic inches and contains a total of six 12 AWG wires. Additional conductors size 10 AWG need to be added in the box. No grounding conductors, devices or fittings are contained in the box. What is the MAXIMUM number of 10 AWG conductors that may be added to this box?
5
How many lighting contactors are required?
5
How many lighting poles are required for the site lighting?
5
How many receptacles are shown in Bedroom #2?
5
Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs are 350 kcmil. The minimum wire bending space required at I is ___ inches. These lugs are of the lay-in type.
5
The minimum demand for an electric clothes dryer in a residential load calculation is ___ watts.
5,000
When calculating the size of a service, the dryer shall either be ___ volt-amperes or the nameplate rating, whichever is greater.
5,000
Luminaires weighing more than ___ pounds are required to be supported independently of the outlet box.
50
Refer to Scenario 223.51. The maximum rating of the primary OCPD is ___ A.
50
Unless specified otherwise, live parts of electrical equipment operating at ___ volts or more shall be guarded.
50
What is the permissible exposure level (PEL), in micrograms, for crystalline silica for an 8 hour shift?
50
When a branch circuit supplies both equipment fastened in place (such as lighting) and cord-and-plug connected equipment, the permanently installed equipment shall not exceed ___ percent of the branch circuit rating.
50
What size circuit is specified for the oven?
50A
A section of 8″ × 8″ wireway is shown in Figure 208.61. The maximum number of 2/0 AWG THHN/THWN conductors that can be installed in the wireway is ___.
57
A flexible cord connection is made directly to the load end terminals of a busway plug-in device. The maximum length of this cord to a tension take-up device is ___ feet.
6
A flush-mounted well light is located in the corner of a sidewalk at a house as shown in Figure 121.211. The sidewalk is 3" thick and Schedule 40 PVC will be installed for the power. This 20-amp, 120-volt circuit is GFCI protected. In inches, what is the minimum depth from the top of the conduit to the top of the sidewalk?
6
A flush-mounted well light is located in the corner of a sidewalk at a house as shown in Figure 121.211. The sidewalk is 3″ thick and Schedule 40 PVC will be installed for the power. This 20-amp, 120-volt circuit is GFCI protected. In inches, what is the minimum depth from the top of the conduit to the top of the sidewalk?
6
When installed in raceways, conductors ___ AWG and larger shall be stranded.
8
For a single-family dwelling with a total of 3500 square feet of occupied area, the minimum number of 15-ampere lighting branch circuits is ___.
6
For angle pulls of conductors 4 AWG and larger, the distance between raceway entries enclosing the same conductor must be at least ___ times the size of the larger raceway.
6
How many type "L" fixtures are shown?
6
IMC is the wiring method installed beneath the grassy area shown above in Figure 207.15. The minimum dimension permitted for Y is ___ inches.
6
In a single-family dwelling the receptacles shall be installed so that no point measured along the floorline is more than ___ft. to the nearest outlet.
6
In pull boxes or junction boxes having any dimension over ___ ft, all conductors shall be cabled or racked up in an approved manner.
6
Lengths of flexible metal conduit longer than ___ feet are not acceptable as an equipment grounding conductor. In such cases a separate bonding jumper is required to be run outside of the flexible conduit to maintain the continuity of the grounding path.
6
Receptacles in a finished basement must be installed such that no point measured horizontally along the floor line of any wall space is more than ___ feet from a receptacle outlet.
6
Refer to Figure 204.7. The smallest size wire permitted for the tap conductors between Pull Box 2 and FD #1 (Fused Disconnect for Load #1) is ___ AWG. A 175-Amp breaker is installed in the panel and 4/0 AWG conductors are installed between the breaker and Pull Box 2. The distance between Pull Box 2 and FD #1 is 21 feet. The nameplate on Load #1 indicates that it will draw 43 amps. Don't forget that the switches have 75ºC lugs so you will select your wire from the 75ºC column.
6
Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs are 4/0 AWG. The minimum wire bending space required at II is ___ inches. These lugs are of the lay-in type.
6
Where buildings exceed 3 stories or 50 feet in height, overhead lines shall be arranged, where practicable, so that a clear space (or zone) of at least ___ feet wide will be left either adjacent to the buildings or beginning not over 8 feet from them to facilitate the raising of ladders when necessary for fire fighting.
6
Where buildings exceed 3 stories or 50 feet in height, overhead lines shall be arranged, where practicable, so that a clear space (or zone) of at least ___ feet wide will be left either adjacent to the buildings or beginning not over 8 feet from them to facilitate the raising of ladders when necessary for fire fighting. a.4
6
Where splices, angle or U pulls are made, the distance between each raceway entry inside the box and the opposite wall shall not be less than ___ times the trade size of the largest raceway, plus the trade size of all other raceways entering on the same wall in the same row.
6
Which division will have specs for the walk-in freezer?
6
A flexible cord connection is made directly to the load end terminals of a busway plug-in device. The maximum length of this cord to a tension take-up device is ___ feet.
6 2020 NEC: 368.56(B)(2)
Select the size of the aluminum equipment grounding conductor required for a circuit protected by a 70-ampere fuse.
6 AWG
What is the minimum size THHN/THWN wire permitted to serve a load that will draw 47 amps? The load will operate for about 5 hours at a time. The branch-circuit OCPD is a circuit breaker that is rated for 75°C.
6 AWG
Busways shall be permitted to be extended vertically through dry floors if totally enclosed (unventilated) where passing through and for a minimum distance of ___ above the floor to provide adequate protection from physical damage.
6 feet
MC cable is used to connect a 2 x 4 lay-in fluorescent luminaire to a "home run" box as shown above in Figure 208.2. The length of the cable between the box and the luminaire is 26 feet. The maximum distance between the luminaire and support #2 is ___.
6 feet
Mineral-insulated, metal-sheathed cable shall be supported and secured at intervals not exceeding ___.
6 feet
High Density Polyethylene conduit larger than ___ shall not be used.
6 inch
High Density Polyethylene conduit larger than ___ shall not be used.
6 inches
In Room 306, luminaires are spaced approximately ___ apart in both directions around five junction boxes.
6 inches
How big is the fire service line?
6''
Refer to Figure 201.21. The bottom of the 120/208-volt panel is at 34" AFF. The ceiling height can be no less than ___ AFF for this installation.
6'-10"
The ampacity of UF cable shall be that of ___ degree C conductors.
60
The ampacity of types NM and NMC cable shall be that of ___ degree C conductors.
60
A nipple contains four 6 AWG THW copper current-carrying conductors. The ampacity of each conductor would be ___ amperes.
65
What size is the sanitary sewer line?
652.60
Where run across the top of floor joists, or within ___ feet of the floor or floor joists across the face of rafters or studding, in an attic that has permanent stairs, nonmetallic sheathed cable must be protected by substantial guard strips that are at least as high as the cable.
7
What is the MINIMUM bend radius for 1 in. diameter corrugated sheath MC cable?
7 in
A feeder supplying a 5 kW wall-mounted oven and a 7 kW counter-mounted cooktop in a residence shall have a minimum demand factor of ___.
7.8 kW
A ceiling fan that weighs ___ pounds or less can be supported by an outlet box that is identified for such use and has "maximum weight to be supported — 70 lbs" stamped into the box.
70
When eight (8) current-carrying conductors are in one conduit, the ampacity of each conductor is adjusted to ___ percent.
70
Where permissible, the demand factor applied to that portion of the unbalanced neutral feeder load in excess of 200 amps is ___ percent.
70
What is the mounting height of the kitchen clock receptacle?
72″
In a dwelling, it shall be permissible to apply a demand factor of ___ percent to the nameplate rating load of four or more appliances fastened in place.
75
It shall be permissible to apply a demand factor of ___% to the nameplate ratings of 4 or more fastened-in-place water heaters in a multifamily dwelling.
75
Splices and taps shall be permitted in surface nonmetallic raceways having a removable cover that is accessible after installation. The conductors, including splices and taps, shall not fill the raceway to more than ___ percent of its area at that point.
75
The conductors, including splices and taps in a metal surface raceway shall not fill the raceway to more than ___ percent of its area at that point.
75
Using the standard calculation, four or more appliances which are fastened-in-place in a one-family dwelling are computed at ___% of the total load for all appliances.
75
When calculating the service-entrance conductors for a farm service, the second-largest load of the total load, shall be computed at ___%.
75
Which of the following is not a standard circuit breaker size?
75
Given the information listed below, the ampacity of a 3 AWG THHN copper conductor is ___ amps.
77.35
What is the elevation of the finished floor?
775.50
Refer to Figure 201.20. The tops of both panel cans are at the same height above the floor. The bottom of the 277/480-volt panel is at 38″ AFF. The ceiling height can be no less than ___ AFF.
7′-2″
For straight pulls of 2 AWG conductors through a junction box, the length of the box shall be at least ___ times the size of the largest raceway.
8
In straight pulls, the length of the box shall be not less than ___ times the trade diameter of the largest raceway for conductors 4 AWG and larger.
8
The minimum size of an equipment grounding conductor for a circuit protected by an automatic overcurrent device rated at 100 amperes is a ___ AWG wire.
8
When a single-gang nonmetallic outlet box does not have a clamp or connector, the maximum distance permitted between the box and the first strap in a NM cable installation is ___ inches.
8
The minimum wire bending space required at the top and bottom of a panelboard that has three 3/0 AWG conductors connected to each busbar is ___.
8 in.
What is the average lighting level calculated for the site lighting?
8.07
A transformer supplies power to a 240-volt, 3Ø, non-continuous 32.841 kVA load. The smallest secondary circuit conductors permitted for this load are used. The secondary OCPD can have a rating not greater than ___ Amps.
80
A conductor has a computed ampacity of 75 amps. What is the maximum standard ampere rating of the overcurrent protection device the NEC® permits to protect this circuit? This is not a motor circuit or part of a multioutlet branch circuit supplying receptacles.
80 amperes
The minimum feeder load for a 40 foot long show window is ___ VA.
8000
The ampacity of conductors is derated when the ambient temperature exceeds ___ºF.
86
Type THW insulation has a ___ degree C rating for use in wiring through fixtures.
90
Which degree of angle is preferred when passing through a structural concrete beam?
90
Per 220.43(B) in the NEC®, ___ VA must be allocated for the lighting track when determining the calculated load on the service where a 12′ length of lighting track is installed in the conference room in an office building.
900
What percentage of compaction must the soil be returned to where concrete is to be poured?
95%
Which method of framing has a very steep pitch?
A-frame
___ construction creates a bungalow-type structure and is typically limited to residential applications.
A-frame
Where are electrical receptacle outlets not permitted to be located?
Above certain electric baseboard heaters
1/4″ equals 1 foot is what type of scale?
Architectural
Which drawing type would have floor plans and finishes?
Architectural
What are the scale types found on drawings?
Architectural/Engineering
Article 210 applies to branch circuits, but branch-circuit calculations for the purpose of determining the size of a service or feeder are covered in ___.
Article 220
___ in a dwelling unit shall supply only loads within or associated with that dwelling unit.
Branch circuits
Where is the EWH (Electric Water Heater) located?
Basement
Which of the following statements about the protection of nonmetallic sheathed cable from physical damage is correct? I. When passing through a floor the cable shall be enclosed in a pipe or conduit extending at least 6 inches above the floor.II. When run across the top of the floor joists in an accessible attic, the cable shall be protected by guard strips.
Both
Which are panel types?
Both a and b
The large-scale adoption of the business computer led to a new form of drafting called ___.
Computer-Aided Drafting (CAD)
CMU is the acronym for ___.
Concrete Masonry Unit
Which type of PVC do plumbers use for venting?
DWV
Where would you find the kitchen equipment schedule?
Division 11
Which MasterFormat® Division is used for electrical specifications?
Division 26
One-line diagrams are found in which drawings?
Electrical
In residential construction, who typically sizes the service?
Electrician
Which of the following is a graphical representation of a vertical plane of view?
Elevation
From the equipment schedule on sheet 9, what is the "ES"?
Equipment Supplier
What does FRP stand for?
Fiber Reinforced Plastic
Typically, where would we find the finishes that are to be installed in a commercial building?
Finish Schedule
Which of the following provides the information for light types? Select one:
Fixture schedule
Which type of protection is depicted on the drawings for the receptacles in the bathroom?
GFCI
Although a residential basement is unfinished, the homeowner wants several receptacles to be installed. These receptacles are required to be ___.
GFCI protected
Per the NEC®, all receptacles in this residence's basement must have ___.
GFCI protection
___ are commonly shown on all drawings to provide basic information such as general references, tasks to be performed, or code conformity.
General Notes
The electric duct heater is installed in which room?
Hallway 208
Circuit breakers shall be marked with a voltage rating not less than the nominal system voltage that is indicative of their capability to interrupt fault currents ___.I. between phases II. from phase to ground III. between the neutral and ground
I & II only
Which of the drawings, shown above in Figure 207.12, satisfies the requirements of the NEC® for conductor length in boxes?
I & IV only
The ___, or other descriptive marking by which the organization responsible for the product may be identified, shall be placed on all electric equipment. I. trademark II. cost III. manufacturer's name
I and III only
The ___, or other descriptive marking by which the organization responsible for the product may be identified, shall be placed on all electric equipment.I. trademark II. cost III. manufacturer's name
I and III only
Refer to Figure 208.35, shown above. Which industrial cover/box combination will violate the NEC®? All the conductors are 12 AWG. I. 4 × 11/2 square with 5.0 in3 industrial cover II. 411/16 × 11/4 square box with a 4.2 in3 industrial coverIII. 4 × 21/8 square box with a 3.6 in3 industrial cover
I only
A 120/208-volt, 3-ph, 4-wire feeder is installed underground to serve 120-volt convenience receptacles, 120-volt lighting, and a 208-volt 1Ø window unit AC/HTR in the parking attendant's "shack" at Park-and-Fly. The feeder is run from a 3-pole breaker in a panelboard that is located inside the vehicle maintenance building. One circuit will be required for the receptacles, one circuit for the lighting, and one circuit for the window unit. The feeder at the shack is permitted to be connected to ___. All spaces in the panel will be occupied by breakers.I. a 12-circuit MB panel II. a 6-circuit MLO panel III. a 24-circuit MLO panel
I or II only
Suffixes that designate the number of conductors within a cable include ___.
I or II only
Which of these receptacles is permitted to be connected to a 20-amp, 120-volt branch circuit that supplies power to several receptacles?I. 15-amp II. 20-amp III. 30-amp
I or II only
4 AWG conductors can be spliced inside an LB type conduit body using ___.
I or II or III
In a 480/277-volt, 3Ø, 4-W panel, a wire connected to breaker 41 is permitted by the NEC® to be ___ in color. A 42-circuit panelboard is shown above.
I or II or III
Where installed in conduit, the following colors of insulation or marking are permitted to identify "hot" phase conductors. I. black, red, and blue II. brown, orange, and yellow III. pink, black, and blue
I or II or III
4 AWG conductors can be spliced inside an LB type conduit body using ___.I. crimp connectors II. screw-type splice connectors III. wire nuts
I or II or III 2020 NEC: 300.13(A)
A branch circuit conductor is connected to breaker 21 in a 120/208-volt, 3Ø, 4-wire panel. The NEC® permits this wire to be ___ in color. A 42-circuit panelboard is shown above. I. black II. purple III. orange
I or II or III 2020 NEC: 310.6(C)
207.10
I, II & III
Fuses shall be plainly marked with their ___.I. ampere rating II. voltage rating III. interrupting rating where other than 10,000 amperes
I, II & III
Refer to Figure 210.18. The grounded conductor between the MLO panel and the source of the power can carry current during ___.I. normal operation II. a ground-fault III. a short circuit
I, II & III
When a receptacle is located ___, it is required to be GFCI protected.I. above the kitchen countertop and within 6 feet of a sink at a restaurantII. in a bathroom adjacent to a basin in a restaurantIII. outside on the exterior front wall of an elementary school
I, II & III
Branch circuits in dwelling units shall supply only loads within that dwelling unit or loads associated only with that dwelling unit. Branch circuits required for the purpose of lighting, ___, or other needs for public or common areas shall not be supplied from a dwelling-unit panelboard.I. communications II. signal III. central alarm
I, II and III
Section 240.21(C)(6) in the NEC® is the "25 foot rule." This section requires that the secondary conductors be 25 feet or shorter in length and ___. I. have an ampacity that is ≥ [(Pri OCPD ÷ 3) × (Epri line ÷ Esec line)] II. have an ampacity that is ≥ the rating of the circuit breaker or fuses at the end III. be installed in a raceway or otherwise protected from physical damage
I, II, & III
A ___-volt circuit is permitted to supply the auxiliary equipment (ballasts for example) of HID luminaires where installed outdoors on 24-foot poles. All voltage systems are grounded. I. 277 II. 120 III. 480 IV. 208
I, II, III or IV
Where the premises wiring system has branch circuits supplied from more than one nominal voltage system, the means of identification of each system phase conductor, wherever accessible, may be by ___. I. tagging, or other equally effective means II. marking tapeIII. separate color coding
I, II, or III
207.12
II & III only
A breaker panel is permitted to be located ___. I. in the bathroom in a house II. in an electrical room in a school III. in a bathroom in a restaurant
II & III only
Fittings and connectors shall be used only with the specific wiring methods for which they are ___.
II & III only
Refer to Figure 208.36. Which industrial cover/box combination will NOT violate the NEC®? All the conductors are 12 AWG. I. 4 x 11/2 square with 5.0 in3 industrial coverII. 411/16 x 11/4 square box with a 4.2 in3 industrial coverIII. 4 x 21/8 square box with a 3.6 in3 industrial cover
II & III only
What conductor in a circuit cannot be marked with a color of white or gray? I. grounded II. equipment grounding III. ungrounded
II & III only
Where installed through wooden studs as shown above in Figure 207.9, which of the installations is permitted by the NEC®?
II & III only
The grounded conductor of a branch circuit that is 6 AWG or smaller shall be ___.I. without splices II. white or gray in color
II only
Which of the illustrations shown in Figure 210.1 would satisfy the Code requirements of 240.22(1)?
II only
A gas water heater is to be installed in the attic of a home to supply hot water for bathing, clothes washing, dish washing, etc. Which of the following are required to be installed in the attic near the water heater?I. a convenience receptacle II. a luminaire
II only 2020 NEC: 210.70(C)
A duplex receptacle with two circuits on the same yoke is permitted to have ___ as a means of disconnect. I. two single-pole circuit breakers without tie handles II. one double-pole circuit breakerIII. two single-pole circuit breakers with tie handles
II or III only
Handles or levers of circuit breakers, and similar parts which may move suddenly in such a way that persons in the vicinity are likely to be injured by being struck by them, shall be ___.I. concealed II. isolated III. guarded
II or III only
In your home, Circuit 22 supplies the upper half and Circuit 24 supplies the lower half of a duplex receptacle. These breakers are permitted to be ___. I. two individual single-pole circuit breakers II. two individual single-pole circuit breakers with handle ties III. a two-pole circuit breaker
II or III only
Where a 120/240-volt, 1Ø, 3-wire multiwire branch circuit is connected to a "split-wired" duplex receptacle in a barber shop, the branch-circuit OCPD/disconnect is permitted to be ___. I. two single-pole circuit breakers without handle ties II. two single-pole circuit breakers with identified handle tiesIII. a 2-pole circuit breaker
II or III only
The equipment grounding conductor is sized according to which of the following? I. cross-sectional area of the phase conductors II. material (copper, aluminum, copper-clad aluminum) of the phase conductorsIII. rating of the circuit overcurrent protective deviceIV. whether a magnetic or non-magnetic raceway is used
III only
When ___ touch together, this is a ground fault. I. two ungrounded circuit conductors II. an ungrounded and a grounded circuit conductor III. an ungrounded circuit conductor and the metal conduit
III only
Which of the boxes shown in Figure 107.31 can be "ganged" together to form a 3-gang box?
III only
Refer to Figure 207.17, shown above. The NEC® cover requirements for the underground conduit in Area B are taken from the row in Table 300.5 entitled ___.
In or under airport runways, including adjacent areas where trespassing is prohibited
A 300-foot run of 800-amp busway is installed in a commercial warehouse building. The last 20′ of the busway run is reduced to a bus rating of 200 amps. Which of the following best describes the requirement for installation of the smaller bus?
It must be protected by an overcurrent device.
A 240/120-V three-wire feeder is to be installed underground from a dwelling unit to a detached garage on the same property. The feeder will be fed from a 90-amp circuit breaker in the dwelling unit panelboard. The feeder will be installed in rigid PVC conduit to the garage. Which of the following best describes Code requirements for installation of this feeder?
It must have an equipment grounding conductor.
Which of the following statements about supplementary overcurrent protection is correct?
It shall not be used as a substitute for a branch circuit overcurrent protection device.
Which room do you walk into if you enter the building from the carport?
Kitchen
Which mechanical drawings show the ceiling registers and diffusers?
M1 & M2
Type ___ cable is a factory assembly of one or more insulated circuit conductors with or without optical-fiber members enclosed in an armor of interlocking metal tape or a smooth or corrugated metallic sheath.
MC
___ cable shall be flame-retardant, moisture-resistant, fungus-resistant, and corrosion-resistant.
NMC
The prints provide general requirements and locations for branch power. What other resource should be referred to (in addition to the prints) for electrical installations?
National Electrical Code®
You need to get power to a 208-volt load. Your available power is from a 120/240-volt, 3Ø, 4-wire panelboard. Is it permitted for you to run a branch circuit from the neutral bar and a 1-pole circuit breaker installed in breaker space #4? The CB has a 120-volt rating.
No
Which type of plan shows power distribution for the entire electrical system?
One-line
A conduit contains four dedicated circuits run from a single-phase panel. The circuits are controlled by breakers 1, 3, 5 and 7. How many equipment grounding conductors should be installed in the conduit?
One. Based on the overcurrent protective device of the largest circuit in the conduit.
What is the point on a wiring system called that takes current to supply utilization equipment?
Outlet
Who installs the owner provided items?
Owner
Who provides the fixtures to be installed in the living room, on either side of the fireplace?
Owner
___ is a foundation type commonly found in areas where soil conditions cause an almost constant shift, which could lead to structural damage.
Pier and beam
fire rating of sealant
Plan E
A GPS device is used in making which of the following?
Plot plans
Which drawings have water piping and drains?
Plumbing
What does PVC stand for?
Polyvinyl Chloride
What is insulation rated by?
R-value
Which type of plan shows lighting?
RCP
Where is the elevator equipment located?
Room 214
___ boxes shall not be used where conduits or connectors requiring the use of locknuts or bushings are to be connected to the side of the box.
Round
What kind of sink is to be installed in Exam rooms 1 through 9?
S1
On the C2 drawing, where in the building is the menu board located?
SE corner
On what sheet are the details of signage foundations with conduits?
Sheet 10A
Which sheet is the security device plan?
Sheet 10B
On what sheet are found the details of site lighting pole foundations?
Sheet 2
What drawings show the steel erections and foundations?
Structural
Which type of plan has steel and foundations?
Structural
What is the nominal size of lumber?
The size prior to surfacing and drying
Who is typically required to warranty the roof against leaks?
The roofer
Where is the date of the drawing found?
Titleblock
In a dwelling, a single receptacle installed for the cord connection to a dishwasher located 2 feet from a kitchen sink but below a countertop requires GFCI protection.
True
Refer to Figure 207.8, shown above. The conductors from Conduit X are permitted to occupy the junction box with the conductors from Conduit Z.
True
The white conductor contained in a 12/2 with ground MC cable can be marked with purple tape where visible or accessible and used for a traveler from a 3-way switch.
True
Underground water-supply piping must be ___.
Type K copper
Which of the following are permitted to be buried in a trench underground? The wiring will be covered with stabilized sand to prevent physical damage.
Type MI cable
Where covered with stabilized sand to prevent physical damage, Type ___ cable is permitted to be directly buried in a trench underground.
UF, MI
___ equipment is constructed so that water (in the form of moisture) will not enter it.
Watertight
207.11
Where the upper wiring method is EMT and contains circuit conductors to a heating unit and the lower wiring method is Class 2 thermostat cable for the heating unit.
Where there are discrepancies between specifications and the drawings, ___.
Where there are discrepancies between specifications and the drawings, ___.
What is an acceptable color for the grounded conductor?
White
Wiring methods permitted in ducts or plenums specifically fabricated to transport environmental air include ___.
Wiring methods permitted in ducts or plenums specifically fabricated to transport environmental air include ___.
Which of the following conductors can be used in a damp location?
XHH
Are smoke detectors in residential bedroom areas required to have AFCI protection?
Yes
Of the following, ___ may be used for a floor receptacle.
a box listed specifically for this application
Where one or more complete paragraphs from the previous edition of the NEC® have been deleted in the current edition, the deletion is identified by ___ between the remaining paragraphs.
a bullet ( • )
Per the specifications, what are we providing with the panelboard upon completion?
a detailed panel schedule
The electrical drawing shows ___.
a location for a generator
When doing the conduit/wiring take-offs, most companies use ___ to calculate the length of the run.
a measuring wheel
Which of the following is not permitted to serve as an equipment grounding conductor?
a metallic water piping system
The equipment grounding conductor is permitted to be run separately from the circuit conductors when ___.
a nongrounded-type receptacle is replaced
Which of the following conductor arrangements is permitted by the NEC®?
a or b only
Section 250.138 permits all the following methods of grounding cord-and-plug-connected equipment, except for ___.
a three- to two-prong attachment plug adapter
If fixtures are scheduled to be installed in the bathroom, they must be listed for ___.
a wet location
Match the following symbol with the term: 3 Way Switch
a.
When several receptacles are connected to a 20-ampere branch circuit, these receptacles are required to be rated ___.
a.15 amperes b.20 amperes either a or b
For a 277/480-V, 3-ph, 4-W wiring system, the NEC® permits the insulation for any of the ungrounded conductors to be ___ in color.
a.orange b.black c.brown d.purple
According to the topographical survey of this project, the existing underground storm piping is to be ___.
abandoned
Electrical junction boxes installed in walls and ceilings shall be ___.
accessible
The miniumum bending radius of Type P cable shall be:
adequate to prevent damage to the cable.
"Faux" finishes on masonry are typically installed with:
adhesive
Compared to Schedule 40, Schedule 80 PVC I. has a thicker wall II. can be used where subject to physical damageIII. has a smaller cross-sectional area for fill purposes
all Three
A residential kitchen plan view is shown in Figure 201.62. Which receptacles are required by the NEC® to be GFCI protected?
all except 2, 3, 4, 5 & 7
A non-dwelling kitchen plan view is shown in Figure 201.62. Which receptacles are required by the NEC® to be GFCI protected? The range receptacle is 50A and the ovens receptacle is 60A.
all except 5
The Code ___.
all of the above
In the reading, arc-fault circuit interrupters (AFCIs) are required in ___ .
all rooms of the home
Which of the following are roofing types?
all the above
Generally, the ___ of a conductor must not be less than the rating of the overcurrent device protecting the conductor.
ampacity
Where a branch circuit is protected with a fused safety switch, the ___ determines the rating of the branch circuit.
ampere rating of the fuses
A 3-pole, 250-volt safety switch can be used as the disconnecting means for ___ motor circuit.
any of these 2020 NEC: 110.4
Loads computed for dwelling unit ___ circuits shall not be permitted to be included with the general lighting load and subjected to the demand factors permitted in Table 220.42 for the general lighting load.
appliance
SE cable used to supply ___ shall not be subject to conductor temperatures in excess of the temperature specified for the type of insulation involved.
appliances
Which of the following is considered a softwood?
cedar
Similar to stainless steel, if FRP is properly maintained, it can inhibit what?
bacteria
Multi-story construction typically uses what type of framing?
balloon
In dwelling units, GFCI protection is required in ___.
bathrooms
Where required, drawings for feeder installations must be submitted before ___.
beginning of installation
When equipment enclosures and raceways are ___, the intent of the definition of Effective Ground-Fault Current Path is satisfied.
bonded
Nominal voltage includes a range of actual circuit voltages that are ___ the nominal voltage.
both a & b
The purpose of the NEC® is the practical safeguarding of ___ from hazards arising from the use of electricity.
both a & b
Where multiwire branch circuits are connected to breakers in a 277/480-volt, 3Ø, 4-wire panel, the neutral has to be counted as a current-carrying conductor (when applying ampacity correction factors) where the connected loads consist of ___ lighting.
both a & b
1″ equals 50 feet is what type of scale?
both a and b
The fans in the indoor boarding area are ___.
both a and b
What is required for acceptance of HVAC systems?
both a and b
What is the wall finish in the dining room?
both a and b
What material is to be used for framing members?
both a and b
What obstacle(s) are experienced when excavating basements?
both a and b
Conductors that are enclosed in Schedule 80 PVC ___.
both a or b
Ceiling-suspended (paddle) fans are required to be installed on ___.
boxes marked as suitable for fan installation
Where a service mast is used for the support of service drop conductors, it shall be of adequate strength or be supported by ___.
braces or guy wires
Cold water piping is represented by what kind of line?
broken line with one dash
Two 20-ampere small appliance circuits ___ supply more than one kitchen of a dwelling.
cannot
Type FCC cable is designed for installations under ___.
carpet squares
Using ___ eliminates the need for drilling after the concrete sets and after the forms are removed.
cast-in concrete anchors
Which type of anchors are installed prior to pouring the concrete?
cast-in concrete anchors
Conductor sizes are given in AWG or
circular mils
Type "C" drawings are:
civil drawings
CAD is the acronym for ___.
computer-aided drafting
Type AC cable shall be permitted for branch circuits and feeders in ___.
concealed work, exposed work
Steel pan decking typically is filled with ___.
concrete
Which type of anchors require drilling?
concrete anchors
Conductors in raceways must be ___ between outlet devices, and there shall be no splices or taps within the raceways.
continuous
CP is the acronym for ___.
control panel
What is the danger with using compressed air driven fasteners with masonry?
damage to masonry
Dual-rated THHN/THWN conductors have an insulation that permits installation in ___ locations.
damp, wet, dry
The project delivery method where the owner works with the architect/engineers directly at project start is ___.
design-bid/build
The project delivery method where the GC is responsible for much of the design is ___.
design-build
Type MC cable shall not be used where exposed to ___ conditions.
destructive corrosive
A unit of an electrical system, other than a conductor, that carries or controls electric energy as its principal function is referred to as a(n) ___.
device
A unit of an electrical system, other than a conductor, that carries or controls electric energy as its principal function is referred to as a(n) ___.
device Correct
A(n) ___ is a device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply.
disconnecting means
When calculating loads to determine the size of a 120/240-volt 1Ø, 3-wire service, the lighting load in amps is calculated by ___ the lighting load in volt-amps by 240 volts.
dividing
When a device box contains a duplex receptacle, a ____ volume allowance is to be counted for the device.
double
A 120-volt cord-and-plug connected appliance is permitted to have a two-wire cord ("hot" & neutral) and attachment plug instead of a three-wire cord ("hot," neutral & ground) when the appliance is ___.
double insulated
The NEC® considers an installation inside a building to be a ___ location.
dry
What is the biggest "competitor" to the electrical installation when related to ceiling and overhead spaces?
ductwork systems
Match the following symbol with the term: Phone Outlet
e.
Feeders containing a common neutral shall be permitted to supply ___.I. 2 or 3 sets of 3-wire feeders II. 2 sets of 4-wire or 5-wire feeders
either
One receptacle is to be installed on a dedicated (individual) branch circuit. A receptacle rated at ___ amps could be used where the circuit is connected to a 40-A circuit breaker. I. 40 II. 50
either I or II
A bare ___ can be used as an equipment grounding conductor.I. busbar II. wire
either I or II 2020 NEC: 250.118(1)
Boxes are to be mounted in non-combustible walls so that the box is flush with the finished wall surface. However, the NEC® permits these boxes to be set back ___ from the finished wall surface.
either a or b
Which type of service(s) is typically installed for residential buildings?
either a or b
The number of home runs is determined by the ___.
electrical contractor (EC)
Wiring methods permitted in ducts or plenums specifically fabricated to transport environmental air include ___.
electrical metallic tubing
Where installed in a metal raceway, all feeder conductors sharing a common neutral conductor shall be ___.
enclosed within the same raceway
Prints are drawn to a scale. Electricians use a(n) ___ scale when reading and determining measurements on a print.
engineering
A(n) ___ shall be used to connect the grounding terminal of a grounding type receptacle to a grounded box.
equipment bonding jumper
Who is responsible for setting kitchen equipment in place?
equipment supplier
Informational Notes ( I-Notes ) in the National Electrical Code® are ___.
explanatory information (not mandatory)
Informational Notes (I-Notes ) in the National Electrical Code® are ___.
explanatory information (not mandatory)
Cablebus shall be installed only for ___ work.
exposed
Match the following symbol with the term: Duplex Receptacle
f.
Masonry may be used for walls, foundations, and ___.
facades
Where fixed glass panels (i.e., windows or non-sliding parts of doors) do not permit installation of wall-mounted receptacles, ___ are typically used to satisfy the receptacle spacing requirements of NEC® 210.52(A)(1) and (2).
floor-mounted receptacles
Generally, the ___ plans show little to no electrical equipment, material, or devices.
foundation and structural
Compliance with the provisions of the Code will result in ___.
freedom from hazard
What could occur if we do not maintain proper spacing between our wiring methods and the plumbers' installation? Select one:
galvanic action
When securing to pressure-treated lumber, it is recommended to use ___.
galvanized fasteners
An example of a commercial project that may have classified areas is a ___.
gasoline station
When using the optional calculation method for dwelling units, this method considers heating or A/C loads and ___ loads.
general
What kind of notes relate to an entire sheet or set of drawings?
general notes
Why is it important to know the final finish type?
get correct box depth
The Code rules and provisions are enforced by ___.
government bodies exercising legal jurisdiction over electrical installations
Service equipment shall have an ampere interrupting rating (AIR) ___ the fault current available at the service location.
greater than or equal to
When a single receptacle is connected to a branch circuit (the circuit has no other loads), the receptacle must have an ampere rating ___ the ampere rating of the OCPD protecting the branch circuit.
greater than or equal to
A 4 AWG equipment grounding conductor can be marked with ___ tape.
green
A continuous white or natural gray covering on a conductor shall be used only for the ___ conductor.
grounded
No grounded interior wiring shall be electrically connected to a supply system unless the supply system contains a corresponding conductor which is ___.
grounded
The neutral conductor of a 120-volt circuit is referred to as the ___ conductor in the NEC®.
grounded
When a piece of equipment is connected to the earth, it meets the definition for ___.
grounded
To avoid heating problems due to induction, the Code generally prohibits installing a single conductor of an alternating-current (ac) system in a metallic raceway. Which of the following single conductors of an ac system is permitted to be installed by itself in a metallic raceway?
grounding electrode conductor
The scope of Article 250 covers all of the following topics, except for ___.
grounding requirements for surge protection
Covered, shielded, fenced, enclosed, or otherwise protected by means of suitable covers, casings, barriers, rails, screens, mats, or platforms to remove the likelihood of approach or contact by persons or objects to a point of danger is the definition of ___.
guarded
Sheetrock® is a registered tradename for ___.
gypsum board
Which piping is to be insulated?
hot and cold
Unless specifically listed for them, a surge-protected device is not permitted on a(n) ___ system.
impedance-grounded
Circuit breakers and switches containing fuses shall be readily accessible and installed so that the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is not more than ___ above the floor or working platform.
in a sub panel 100 feet away from the main distribution panel
A receptacle installed inside a cabinet to serve a cord-connected microwave oven mounted in the cabinet ___ permitted to be connected to one of the two required small-appliance branch circuits for the home.
is not
Figure 201.71 shows the plan view of a room in a house. A receptacle ___ required to be installed in the 18″ wall space in the NW corner of the plan.
is not
Figure 201.71 shows the plan view of a room in a private club. A receptacle ___ required to be installed in the 18" wall space in the NW corner of the plan.
is not
Under certain conditions, the uninsulated conductor in nonmetallic-sheathed cable ___ permitted to be used as a current-carrying conductor ("hot" or neutral). Note: NM cable is not permitted to be used as service-entrance cable.
is not
Using a wire nut, a neutral that enters a box is connected to another neutral that exits the box. A pigtail is also connected under the wire nut and goes to a receptacle in the box. This pigtail ___ counted in the box fill calculation per 314.16(B)(1).
is not
AFCI protection ___ when a 10-foot branch circuit extension is added to a dwelling family room per the NEC®.
is required
Soldered splices must be ___ so as to be electrically secure before soldering.
joined mechanically
In a building with a basement, ___ support the floor above.
joists
What kind of notes relate to specific items on a drawing?
key notes
In the reading, the ___ has/have the most code requirements for electrical installations.
kitchen
Per the drawings, where is the panel to be located?
kitchen closet
A metal box or terminal fitting having separately bushed holes for each conductor shall be used whenever change is made from conduit to
knob and tube wiring
Finishes required for the restaurant include all of the below except ___.
landscaping
Loads, such as heating and air conditioning, that do not operate at the same time are said to be noncoincident loads. While separate circuits must be designed to serve each load, when calculating service load only the ___ of two noncoincident loads needs to be included.
larger
When several AC, MC, or NMC cables are installed next to each other in a bundle, the conductors in the cables are able to carry ___ current than if the cables were separated.
less
The photometric drawing is typically done by the ___.
lighting designer
A(n) ___ is a box that contains branch circuit conductors that are connected to a luminaire.
lighting outlet
According to the topographical survey of this project, ___ is/are required to be removed.
lighting poles
Transient voltage surge suppressors are used to minimize the damage to connected equipment caused by ___.
line surges and spikes
The ___ connects the equipment grounding conductors to the grounded (neutral) conductors.
main bonding jumper
All metal raceways, cable armor, fittings, cabinets, and other metal enclosures for conductors must be ___ joined together to form a continuous electrical conductor.
metallically
Penetrations in steel beams or columns ___.
may cause failure
What is R-Value?
measure of thermal resistance
It is also important to read the ___ plan to determine where an electrical installation may be required, such as how close to install a receptacle near a sink.
mechanical and plumbing
What electrical tests are required?
megger
Which material is more common today for structural support?
metal
Which material is most resistant to damage by fire?
metal
26 feet of Type AC cable is used to connect a 2 × 4 lay-in fluorescent luminaire to a "home run" box as shown above in Figure 208.2. Supports #1 & #2 are as far from the connectors as the NEC® permits. You will have to install ___ additional supports between #1 and #2.
more than 3
A(n) ___ is an assembly of one or more enclosed sections having a common power bus and principally containing motor control units.
motor control center
The service equipment disconnect for a manufacturing building shall be installed at a readily accessible location either outside or inside ___ entrance of the service conductors.
nearest the point of
Are lighting fixtures in master bathroom areas required to have AFCI protection?
no
Does the NEC® permit the installation shown above at X in Figure 208.1? The box is supported only by the conduits. The distance from the top of the head track to the bottom of the 4-SQ box is 2 inches. Both conduits are EMT and are attached to the box with steel compression connectors (not visible in drawing).
no
For Type MC cable, is the insulated green conductor permitted to be used as a current-carrying circuit conductor?
no
Is the conduit between the street lighting poles covered by the NEC®? The street lighting and conduit were installed in the utility easement as shown in the drawing at the right and is under the control of the utility company.
no
Refer to Figure 205.12. The equipment grounding conductor is run on the inside of the FMC and the length of the flex is 8 feet. Is this a Code violation?
no
You need to get power to a 208-volt load. Your available power is from a 120/240-volt, 3Ø, 4-wire panelboard. Is it permitted for you to run a branch circuit from the neutral bar and a 1-pole circuit breaker installed in breaker space #4? The CB has a 120-volt rating.
no
Refer to the office building hallway shown above in Figure 108.020. The NEC® requires ___ receptacles to be installed in the hallway. The hallway is 63 feet long.
none are required
Which of the following installations ARE covered by the NEC®?
none of the above
On the Topographical Survey, what is the scale?
none of these
What is the largest capacity RTU?
none of these
Where does heat come from in Vestibule 144?
none of these
Rigid Metal Conduit (RMC) is generally made of galvanized steel or aluminum. Aluminum is considered to be a ___ metal.
nonferrous
Harmonic currents occur when ___ loads are connected to the circuit.
nonlinear
What is the elevation of the first floor?
north side
Where is the existing OH line?
north side of the property
A receptacle under the kitchen counter of a dwelling is used to supply power to a dishwasher. This receptacle is ___ to be connected to one of the two required small-appliance branch circuits.
not permitted
Along a kitchen countertop in a restaurant, the maximum spacing between receptacles is ___.
not specified
What is the specified warranty of HVAC systems?
not specified
Who is responsible for removing the light poles?
not specified
How are electrical boxes sized?
number of conductors, raceway size(s)
Which of the following is considered a hardwood?
oak
Many franchise restaurants are ___.
of the same layout and design
In general, a building or structure shall be supplied by only ___ service(s).
one
Per the NEC®, a minimum of ___ receptacle(s) is required at the front of the house and at the back of the house.
one
Where any of the single conductors installed in ladder or ventilated trough cable trays are 1/0 through 4/0 AWG, all single conductors shall be installed in ___ layer(s).
one
When a single-car garage is attached to a house, the NEC® requires that the garage have at least ___ receptacle(s) installed inside the garage.
one (on any wall)
You are to run a circuit underground in PVC conduit from a service panelboard to an isolated ground receptacle. The isolated ground receptacle is mounted in a metal box. Along with the circuit conductors, you will pull in ___.
one grounding conductor and connect it to the metal box and one grounding conductor and connect it to the green screw on the receptacle
A single family dwelling is defined as "a structure that is complete in ___ unit and ___ attached to another dwelling unit by common walls."
one, not
The ___ is an isometric view of the distribution system to install from.
one-line / riser diagram
On the electrical distribution drawing, the power distribution system is labeled "power riser." Other projects may call this a ___.
one-line diagram
On a 4-wire, delta-connected system where the midpoint of one phase winding is grounded, only the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is ___ in color.
orange
For the calculations required in Article 220, the total area of an occupancy is determined from the ___ dimensions of the building or structure.
outside
On this project, Division 1 contains ___.
overall project description, location, and requirements
Branch circuits are rated according to their ___.
overcurrent protective device rating
Per the drawings, what type of service are we to install?
overhead
All conductors in a multiwire branch circuit shall originate from the same ___.
panelboard
Service conductors supplying one building shall not ___ of another building.
pass through the interior
For the contractor to plan the outdoor conduit and number of circuits, information on the ___ and electrical panel schedule must be reviewed.
photometric plan
The simplest and most common form of framing is ___.
platform
Which is the most common form of framing?
platform
The ___ plan shows the compass direction of the building.
plot
Which method of framing is more of an open structure with exposed timber members?
post and beam
The type of foundation where cables are used to strengthen the concrete is?
post tension slab
The Code applies to the installation of electrical conductors, equipment and raceways in which of the following?
recreational vehicles
The ___ plan shows location of lighting fixtures and other equipment, such as air-handling diffusers, smoke detectors, or sprinkler heads.
reflected ceiling plan
Liquidated damages are ___.
related to unexcused delays in completion
Any electrical circuit that controls any other circuit through a relay or an equivalent device is a ___.
remote control circuit
RFP typically means ___.
request for pricing/proposal
Which is the number one assassin of profitability?
rework
Where raceways are exposed to widely different temperatures, they shall be ___.
sealed
Sheet 10B is the security device plan. What does it not define?
security device manufacturer
The small-appliance and laundry loads ___ be permitted to be included with the general lighting load and subjected to the demand factors provided in NEC® Table 220.42.
shall
The member that is secured to the foundation is called?
sill plate
Where two internal cable clamps are present in a box, a ___ conductor volume allowance will be counted towards the box fill calculation, based on the largest conductor in the box.
single
The brick veneer residence is a ___.
single-family residence
Cover plates for switches shall be ___.
stainless steel
What is required for grounding in conduits?
stainless steel
What is the cover plate material for Room 106?
stainless steel
How do you access the basement?
stairs in the carport
Refer to Figure 204.6. The 8 AWG conductors in Conduit I are ___ conductors.
tap
Depending on the application, there are several options to seal penetrations. Which technique is not a method?
tape
Figure 204.5
taps
The ___ rating of a conductor is the maximum temperature, at any location along its length, that the conductor can withstand over a prolonged period of time without serious degradation.
temperature
Nonmetallic boxes shall be suitable for the lowest ___ conductor entering the box.
temperature-rated
Who furnishes the communication system? Select one:
the EC
Who furnished heating units?
the MC
The definition of a branch circuit is ___.
the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s)
Listed or labeled equipment shall be installed and used in accordance with ___.
the instructions included in the listing or labeling
The ampacity of an insulated conductor is ___.
the maximum amount of current it can carry continuously without damage to the insulation
The gauge of a metal stud determines the ___ of the stud.
thickness
Which is a industry best practice or preferred method to bring power to a RTU?
through the curb
What is the wall finish in the restrooms?
tile
The project delivery method used for change orders or small projects is ___.
time and material
On sheet A-1.0, which way is north?
toward the right of the plan
Overhead service conductors shall have a minimum clearance from final grade of 241/2 feet when installed over ___.
tracks of railroads
There are ___ types of lumber used in construction.
two
Per the NEC® which of the following bends are permitted in a conduit run between two junction boxes?
two 90s plus one-45° three-point saddle plus one-12° offset
If installed, a surge protective device shall be connected to each ___ conductor.
ungrounded
The "hot" conductor of a circuit is referred to as the ___ conductor in the NEC®.
ungrounded
The disconnecting means for a multiwire branch circuit shall open all ___ at the point of origin.
ungrounded
VTR is the acronym for ___.
vent to roof
Enclosures for overcurrent devices shall be mounted in a(n) ___ position.
vertical
Reasonable efficiency of operation can be provided when ___ is taken into consideration in sizing the feeder conductors.
voltage drop
Insulated conductors and cables installed in wet locations must have a ___ designation in their type marking.
w
Where do we find the interior components of a wall in the drawings?
wall detail
Aside from paint, there are many other interior finishes. What is an example of an interior finish?
wood paneling
In NEC® Chapter 3, Wiring Methods and Materials, requirements for splices and taps can be found in the ___ section.
xxx.56
Are lighting fixtures in residential bedroom areas required to have AFCI protection?
yes
Does the NEC® permit the circuits from the panels to enter the same pull box, shown above in Figure 207.8?
yes
Refer to Figure 108.014. This kitchen is in a house and width of the countertop where receptacle 9 is located is 13″. Is receptacle 9 required by the NEC®?
yes
Refer to Figure 108.014. This kitchen is in a house. Does the NEC® permit receptacle 11 to be connected to one of the 20-amp small-appliance branch circuits?
yes
Outlet boxes that do not enclose devices or utilization equipment shall have a minimum internal depth of ___ inch(es).
½
