Holt, Electricians Exam Prep, Unit 5
(230) Individual open conductors and cables other than service-entrance cables shall not be installed within _____ feet of grade level or where exposed to physical damage.
10
(230) Overhead sevice drop conductors shall have a horizontal clearance of _____ feet from a pool.(680.8)
10
(210)A branch circuit rated 20 amps serves four receptacles. The rating of the receptacles must not be less than _____ amperes.
15
How many no. 14 RHH conductors can be installed in 1 inch electrical metallic tubing?
16
What size outlet box is required for 14/3 type NM cable (with ground) that terminates on a switch, with 14/2 NM cable that terminates on a receptacle, if the box has internal cable clamps factory installed?
4 x 2 1/8 square
If we have a 2 inch rigid metal conduit and we want to install three THHN aluminum compact conductors, what is the largest aluminum compact conductor permitted to be installed?
300kcmil
Depth of Box and Conduit body sizing: When conductors enter an enclosure opposite a removable cover, such as the back of a pull box or conduit body, the distance from where the conductors enter to the removable cover should be calculated according to Table _____, one wire per terminal.
312.6
When conductors enter an eclosure opposite a removable cover, the distance from where the conductors enter to the removable cover determined using Table _____ (1 terminal column)
312.6(A)
If a 250kcmil wire is run through a 3 inch raceway entry in the wall opposite to a removable cover, the distance from that cover must not be less than _______.
4 ½ inches
(250) Stainless steel ground rods shall not be less than _____ in diameter.
5/8 inch
(210)The total rating of utilization equipment fastened in place shall not exceed _____ percent of the branch circuit ampere rating, where the circuit supplies receptacles for cord-and-plug connected equipment.
50
The minimum headroom of working spaces about motor control centers shall be _____.
6'6"
Circuit protective devices are used to clear a fault without the occurrence of extensive damage to te electrical components of the circuit. This fault shall be assumed to be either between two or more of the _____ or between any circuit conductor and the grounding conductor or enclosing metal raceway.
Circuit conductors
Conductors larger than No. 4/0 are measured in _____.
Circular mils
The temperature rating associated with the ampacity of a _____ shall be so selected and coordinated so as to not exceed the lowest temperature rating of any connected termination, conductor, or device.
Conductor
An outlet intended for the direct connection of a lampholder, a lighting fixture, or a pendant cord terminating in a lampholder is a(n) _____.
Lighting outlet
In judging equipment, considerations such as mechanical strength and arcing effects should be evaluated(True/False)
True
(220) When a calculation results in a fraction of ampere of ____ or more, we "round up" to the next ampere.
.50
How many compact No. 6 XHHW conductors can be installed in a 1 ¼ inch nonmetallic tubing?
10
(210)A single receptacle installed on an individual branch circuit must be rated at least _____ percent of the rating of the circuit.
100
(220) The feeder demand load for four 6 kw cooktops is _____ kW.
12
A junction box contains two 2 inch raceways on the left side and two 2 inch raceways on the top. What is the distance from the bottom to the top wall?
14 inches
A junction box contains two 2 inch raceways on the left side and two 2 inch raceways on the top. What is the distance from the left to the right wall?
14 inches
(220) For other than dwelling units, the feeder and service load calculation for track lighting is to be determined at 150 volt-amperes for every ____ feet of track installed.
2
Determine the minimum cubic inches required for two No. 10 TW passing through a box, four No. 14 THHN terminating, two No. 12 TW terminating to a receptacle, and one No. 12 equipment bonding jumper from the receptacle to the box.
22 cubic inches
(220) Receptacle outlets in dwelling units are part of the ____ VA per square foot general lighting load.
3
(230) Overhead service conductors to a building shall maintain a vertical clearance of 10 feet above platforms, projections, or surfaces from which they might be reached. This vertical clearance shall extend _____ feet measured horizontally from the platform, projections, or surfaces from which they might be reached.
3
(225) Communications conductors shall be mounted not less than ____ inches below power conductors rated over 300 volts supported on poles.
30
The working space in front of the electric equipment shall not be less tha _____ inches wide or the width of the equipment, whichever is greater.
30
(210)Receptacle outlets in a dwelling unit must be installed within _____ inches of the outside edge of each basin and the receptacle must be located on a wall that is adjacent to the basin location.
36
How many No. 18 TFFN conductors can be installed in a ¾ inch liquidtight flexible metallic conduit?
39
(210)The 24 inch dimension required in a dwelling unit countertop is measured along the wall line or center line, and the intent is that there be a receptacle outlet for every _____linear feet or fraction thereof of counter length.
4
Depth of Pull or Junction Box: A 24" x 24" pull box has two 2 inch conduits that enter the back of the box with No. 4/0 conductors. What is the minimum depth of the box?
4
How many NO. 6 RHH (without outer cover) can be installed in a 1 " nonmetallic tubing?
4
The cross sectional areas of conduit and tubing can be found in Table _____ of Chapter 9.
4
(225) If festoon lighting exceeds a span of ____ feet, messenger wires shall support the conductors.
40
Three or more conductors can take up to ____% of the cross-sectional area of a raceway.
40%
(210)The recommended maximum total voltage drop on both the feeders and banch circuits is _____ percent.
5
(215)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
An insulated grounded conductor of No. ____ or smaller shall be identified by a continuous white or natural gray outer finish along its entire length.
6
Equipment approved for use in dry locations shall be protected against permanent damage from the weather during _____.
Building construction
Nipple: One or more conductors can take upt o _____% of the cross sectional area of a nipple.
60%
Conductors in Spare Space Area: An existing 1 inch EMT contains two No. 12 THHN conductors, two No. 10 THHN conductors, and one No. 12 bare stranded conductors. How many additional No. 8 THHN conductors can be added to this raceway?
7 if raceway is more than 24 inches long, 12 if raceway is 24 inches long or less.
(220) The maximum unbalanced feeder load for household electric dryers shall be calculated at ____ percent of the demad load as determined by Table 220-54.
70
Design B, C, D, or E motors shall be wired with conductors having an insulation rating of at least _____ degrees C, and the conductor shall be sized based on the 75 degree C ampacity as listed in Table 310-15(B)(16) (formerly 310-16)
75 degrees C
(225) Outside branch circuits and feeder conductors shall have a vertical clearance of _____ feet from the surface of a roof.
8
Chapter 9, Table ____ can be used when calculating the cross-sectional area of bare conductors.
8
How many #10 THHN are permitted in a 4 x 1 ½ square box?
8
Outlet Box Size: What size outlet box is required for six No. 12 THHN conductors, and three No. 12 THW conductors?
9
When determining the number of conductors in a box fill two No. 18 fixture wires, one 14/3 nonmetallic sheathed cable with ground, one duplex switch, and two cable clamps would count as ______ conductors.
9
(230) Where the service disconnecting means is mounted on a switchboard having exposed busbars on the back, a raceway shall be permitted to terminate with a _____.
Bushing
(230) Service heads must be located _____.
Above the point of attachment
(Article 100) A junction box above a suspended ceiling that has removable panels is considered to be _______.
Accessible
Understanding Chapter 9 Tables: When all the conductors are the same size and insulation, the number of conductors permitted in a raceway can be determined simply by looking at the Tables in ______.
Annex C
When all the conductors are the same size, the number of conductors in a raceway can be determined by looking at the tables located in ________
Annex C
A _____ switch is a manually operated device used in conjunction with a transfer switch to provide a means of directly connecting load conductors to a power source and of disconnecting the transfer switch.
Bypass isolation
____ branch circuits supply energy to one or more outlets to which appliances are to be connected.
Appliance
(225) Overhead branch circuit and feeder conductors shall not be installed _____ openings through which materials may be moved, such as openings in farm and commercial buildings, and hall not be installed where they will obstruct entrance to these building openings.
Beneath
(215)Where a feeder supplies _____ in which equipment grounding conductors are required, the feeder shall include or provide a grounding means to which the equipment grounding conductors of branch circuits shall be connected.
Branch circuits
(220) The demand factors listed in Table 220-42 shall not be applied in determining the number of _____ for general illumination.
Branch circuits
(240) Where an orderly shut down is required to minimize hazard() to personnel and equipment, a system of coordination based on two conditions shall be permitted. Those two conditions are (10______short-circuit protection, and (2) ______ indication based on monitoring systems or devices.
Coordinated, overload
(230) Service-lateral conductors are required to be insulated (except the grounded conductor) when it is _______.
Copper-clad aluminum with individual insulation
(240) Fuseholders for cartridge fuses shall be so esigned that it is difficult to put a fuse of any given class into a fuseholder that is designed for a _____lower, or _____ higher, than that of the class to which the fuse belongs.
Current, voltage
A unit of an electrical system, which is intended to carry, but not utilize electrical energy. Is a______.
Device
(230) In a multiple-occupancy building, each occupant shall have access to its own service_____.
Disconnecting means
A ______ location may be temporarily subject to dampness and wetness.
Dry
So constructed that dust will not enter the enclosing case under specified test conditions is known as _____.
Dusttight
(250) When a building has two or more elecrodes for different services, the separate electrodes must be ______. This shall be considered as a single electrode in this sense.
Effectively bonded together
(225) Lamps for outdoor lighting shall be below all _____, transformers or other electrical utilization equipment.
Energized conductors
An apparatus enclosed in a case that is capable of withstanding an explosion of specified gas or vapor that may occur within it, and of preventing the ignition of a specified gas or vapor surrounding the enclosure by sparks, flashes, or explosion of the gas or vapor within, and that operates at such an external temperature that a surrounding flammable atmosphere will not be ignited is defined as _____.
Explosion-proof
(210)Indwelling units, outdoor receptacles can be connected to the 20 ampere small appliance branch circuit.(True/False)
False
(250) Currents that introduce noise or data errors in electronic equipment shall be considered objectionable currents.(True/False)
False
A two-family dwelling unit, such as a duplex apartment, is considered a single family dwelling. (True/False)
False
Warning signs for over 600 volts shall read "Warning - High Voltage - Keep Out". (True/False)
False
When different wiring systems are in the same raceway or enclosure, the grounded conductor of one system can be white and the grounded conductor of the other system can be gray (True/False)
False
The 2011 NEC defined ______ as all conductors between a source of power from a battery, a solar voltaic system, generator, transformer, or converter windings, and the final branch circuit overcurrent protections device(s).
Feeder
(225) Conductors for ____ lighting shall be of the rubber-covered or thermoplastic type.
Festoon
(210)Grade-level portions of ________and _______ accessory buildings used for storage or work areas shall have ground-fault ciruit interrupter protection for all 15 and 20 ampere, 125 volt receptacles.
Finished, unfinished
(220) When sizing a feeder, the appliance loads in dwelling units can apply a demand factor of 75 percent of nameplate ratings for ____ or more appliances fastened in place on the same feeder.
Four
(230) As used in Section 230-95, the rating of the service disconnecting means is considered to be the rating of the largest _____ that can be installed or the highest continuous current trip setting for the actual overcurrent protection device installed in a circuit breaker is rated or can be adjusted.
Fuse
(230) Where individual open conductors are not exposed to the weather, the conductors shall be mounted on _____knobs.
Glass or porcelain
(220) Feeder conductors for new restaurants shall not be required to be of ______ ampacity than the service-entrance conductors.
Greater
(210)All 125 volt, single phase 15 and 20 ampere receptacles installed in bathrooms of guest rooms in hotels/motels, dwelling units, and office buildings shall have ____________for personel.
Ground-fault circuit interrupter protection
A system intended to provide protection of equipment from damaging line-to-ground-fault currents by operating to cause a disconnecting means to open all ungrounded conductors of the faulted circuit is defined as _____.
Ground-fault protection of equipment
(210)Receptacle and cord connectors having grounding terminals must have those terminals effectively _______.
Grounded
(240) No overcurrent protection device shall be connected in series with any conductor that is intentionally grounded, except where the overcurrent protection device opens all conductors of the circuit including the _____ conductor, and is so designed that no pole can operate independently.
Grounded
A system or circuit conductor that is intentionally grounded is a(n)_____ This conductor is often called a neutral conductor in the field, and is identified with the color white or gray.
Grounded conductor
Concrete, brick, or tile walls shall be considered as _____, as it applies to working space requirements.
Grounded.
When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably _____.
Guarded
(240) Plug fuses of 15 amperes and lower ratings shall be identified by a _____ configuration of the window, cap, or other prominent part to distinguish them from fuses of higher ampere ratings.
Hexagonal
The highest current at rated voltage that a device is intended to interrupt under standard test conditions is the ______.
Interrupting rating
A qualifying term indicating that there is a purposely introduced delay in the tripping action of the circuit breaker, which delay decreases as the magnitude of the current increases, is defined by the Code as a _____ circuit breaker.
Inverse time
(230) Service heads for service raceways shall be ______.
Listed for use in wet locations
(250) A grounding connection shall not be made to any grounded circuit conductor on the ____ side of the service disconnecting means except as permitted for separately derived systems or separate buildings.
Load
(220) Feeder and service-entrance conductors with demand load determined by the use of 220.80 shall be permitted to have the ____ load determined by Section 220-61.
Neutral
(250) Where service-entrance conductors are installed in parallel, the grounded conductor in each raceway can be sized, based on the size of the ungrounded service-entrance (phase) conductor in the raceway, but not smaller than _____.
No. 1/0
(230) To supply power to a single-phase water heater, the size of the underground service lateral conductors shall not be smaller than _____.
No. 10 aluminum
(240) Flexible cords approved for use with listed appliances or portable lamps shall be considered as protected by a 20 ampere circuit breaker if they are ____.
No. 18 and larger
(250) What size copper grounding electrode conductor is required for a service that has three sets of 500 Kcmil copper per phase?
No. 3/0
(250) An additional electrode shall suppleent a metal underground water pipe. Where the supplemental electrode is a made electrode as in Section 250-83(c) or (d), that portion of the bonding jumper that is the sole connections to the supplemental grounding electrode shall not be required to be larger than _____ wire.
No. 6 AWG copper or No. 4 AWG Aluminum
A value assigned to a circuit or system for the purpose of conveniently designating its voltage class such as 120/240 volts is called ______voltage.
Nominal
(250) _____on equipment to be grounded shall be removed from contact surfaces to ensure good electrical continuity.
Nonconductive coatings
(230) Where the service overcurrent devices are locked or sealed, or not readily accessible to the _____, the branch circuit overcurrent devices shall be located in a readily accessible location.
Occupant
(210)At least _____ wall switch-controlled lighting outlet(s) shall be installed in every dwelling unit habitable room and bathroom.
One
(230) A building or structure shall be supplied by a maximum of _____ services.
One
(240) Overcurrent protection for conductors and equipment is provided to ______ the circuit if the current reaches a value that will cause an excessive or dangerous temperature in conductors or conductor insulation.
Open
(230) The service disconnecting means shall plainly indicate whether it is in the _______ position.
Open or closed
A(n) ______ is a point on a wiring system where current is taken to supply equipment that uses electricity.
Outlet
The Code prohibits damage to the internal parts of electrical equipment by foreign material such as paint, plaster, cleaners, etc. Precautions must be taken to provide protection from the detrimental effects of paint, plaster, cleaners, etc. on the internal parts of ______ and ______.
Panelboards, receptacles
An enclosure or device so constructed that a beating rain will not enter is _______.
Raintight
(230) Branch circuit and feeder conductors shall not be installed in the same raceway or cable with service conductors.(True/False)
True
(225) Where buildings exceed three stories, overhead lines shall be arranged so that a clear space at least 6 feet wide will be left either adjacent to the buildings or beginning not over 8 feet from them to facilitate the _____ when necessary for fire fighting.
Raising of ladders
(240) Where used as switches in 120-volt and 277-volt fluorescent lighting circuits, circuit breakers shall be marked ______.
SWD
Equipment enclosed in a case or cabinet that is provided with a means of sealing or locking so that live parts cannot be made accessible without opening the enclosure is said to be _______.
Sealable
(240) Conductors supplying a transformer shall be permitted to be tapped without overcurrent protection at the tap where the conductors supplying the _____ of the transformer have an ampacity at least 1/3 the rating of the overcurrent device protecting the feeder conductors.
Secondary
(230) When ground-fault protection is provided for the ____ disconnecting means and interconnection is made with another supply system by a transfer device, means or devices may be needed to ensure proper ground-fault sensing by the ground-fault protection equipment.
Service
The necessary equipment, usually a circuit breaker or switch and fuse and their accessories, intended to constitute the main control and cutoff of the supply is referred to as _____.
Service equipment
(230) There shall be no more than _____ disconnects installed for each service, or for each set of service-entrance conductors as permitted in Section 230-2 and 230-40.
Six
(210)In dwelling units, when determining the spacing of general use receptacles, ____ on exterior walls are not considered wall space.
Sliding panels
(220) The connected load to which the demand factors of Table 220-84 apply shall include 3 volt-amperes per _____ for general lighting and general-use receptacles.
Square foot
(230) Circuits used only for the operation of fire alarm, other protective signaling systems, or the supply to fire pump equipment shall be permitted to be connected on the _____ of the service overcurrent protection device where separately provided with overcurrent protection.
Supply side
(230) Service conductors shall be connected to the disconnecting means by pressure connectors, clamps, or other approved means(True/False)
True
Where switches, cutouts or other equipment operating at 600 volts nominal, or less are installed in a room or enclosure where there are exposed live parts or exposed wiring operating at over 600 volts, nominal, the high-voltage equipment shall be effectively separated from the space occupied by _____ by a suitable partition, fence, or screen.
The low voltage equipment.
(230) The requirement for maintaining a 3 foot vertical clearance from the edge of the oof shall not apply to the final conductor span where the service drop is attached to ______.
The side of a building
Openings in ventilated dry-type _____ or similar openings in other equipment over 600 volts shall be designated so that foreign objects inserted through these openings will be deflected from energized parts.
Transformers
(210)A dedicated 20-ampere circuit is permitted to supply power to a dwelling unit bathroom for receptacle outlet(s) and other equipment within the same bathroom.(True/False)
True
(210)A permanently installed cord connector on a cord pendant shall be considered a receptacle outlet.(True/False)
True
(210)At least one lighting outlet controlled by a wall switch, or containing a switch, located at the point of entry to the attic, under floor space, utility room, and basement shall be installed where these spaces are used for storage or contain equipment requiring servicing.(True/False)
True
(210)Dwelling unit GFCI protection is required for all 125-volt, 15 and 20 ampere receptacles installed to supply countertop appliances in kitchens.(True/False)
True
(210)For a one-family dwelling at least one receptacle outlet is required in each basement, attached garage, or detached garage with electric power.(True/False)
True
(210)In a dwelling unit, every habitable room, including hallways and stairways and bathrooms shall have a switch-controlled lighting outlet.(True/False)
True
(210)Receptacles installed behind a bed in the guest rooms in hotels and motels shall be located so as to prevent the bed from contacting an attachment plug, or the receptacle shall be provided with a suitable guard.(True/False)
True
(210)When breaks occur in dwelling unit kitchen countertop spaces for ranges, refrigerators, sinks, etc., each countertop surface is considered a separate counter space for determining receptacle placement.(True/False)
True
(230) Service entrance conductors can be spliced or tapped by clamped or bolted connections at any time as long as the free ends of conductors are covered with an insulation that is equivalent to that of the conductors or with an insulating device identified for the purpose (Sections 110-14); wire connectors or other splicing means installed on conductors that are buried in the earth shall be listed for direct burial [section 300-5e]; or No splice is made in the raceway [Section 300-13](True/False)
True
(230) Underground Service-entrance conductors are required to be insulated except when they are bare copper installed in a raceway, or bare copper and part of the cable assembly identified for underground use.(True/False)
True
(240) A current transformer and overcurrent relay shall be considered equivalent to an overcurrent trip unit(True/False)
True
(240) Breakers and fuses can be used in parallel when factory assembled in parallel or listed as a unit.(True/False)
True
(240) Overcurrent protection devices are not permitted to be located where exposed to physical damage; near easily ignitable materials, such as clothes closets; in bathrooms of dwelling units.(True/False)
True
(240) Single-pole breakers with approved handle ties can be used for the protection for each ungrounded conductor for line to nuetral connected loads.(True/False)
True
(240) Type S fuses, fuse holders, and adapters are required to be designed so that tampering and shunting would be difficult (True/False)
True
(240) Unless specifically permitted in 240-3(e) through 240-3(g), the overcurrent protection shall not exceed 15 amperes for No. 14 copper; 20 amperes for No. 12 copper; and 30 amperes for No. 10 copper.(True/False)
True
(250) A grounding electrode is required if a building or structure is supplied y a feeder, or by more than one branch circuit.(true/False)
True
(250) Conductive materials enclosing electrical conductors or equipment are grounded to limit the voltage to ground and are bonded to facilitate the operation of overcurrent protection devices under ground-fault conditions.(True/False)
True
(250) If none of the electrodes specified in Section 250-50 are available, then local metal underground systems or structures (not gas); ground rods or pipes; or plate electrodes canbe used as the required grounding electrode.(True/False)
True
(250) Supplementary grounding electrocces can supplement the equipment grounding conductor, but they cannot be used as the sole equipment grounding conductor.(True/False)
True
(250) The grounding electrode conductor shall be made of copper, aluminum, or copper-clad aluminum.(True/False)
True
(Article 100) According to the Code, automatic is self-acting, operating by its own mechanism when actuated by some impersonal influence such as change in current strength, mechanical configuration, temperature. (True/False)
True
A signaling circuit is any electric circuit that energizes signaling equipment. (True/False)
True
A thermal protector may consist of one or more heat-sensing element integral with the motor or motor-compressor and an external control device.(True/False)
True
Article 200 contains the requirements for the identification of terminals, grounded conductors in premises wiring systems, identification of grounded conductors. (True/False)
True
At least one entrance not less than 24 inches wide and 6 ½ feet high shall be provided to give access to the working space about electrical equipment that operates at over 600 volts, nominal. On switchboard and control panels exceeding 6 feet in width, there shall be one entrance at each end of such equipment, except where the work space required in Section 110.34(a) is doubled (True/False)
True
Connection of conductors to terminal parts shall ensure a thoroughly good connection without damaging the conductors and shall be made by means of solder lugs, pressure connectors, splices to flexible leads. (True/False)
True
Equipment intended to break current at other than fault levels shall have an interrupting rating at system voltage sufficient for the current that must be interrupted.(True/False)
True
Service conductors only originate from the service point and terminate at the service equipment (disconnect). Conductors supplied from back-up generators, battery UPS systems, transformers, etc., are considered "feeders".
True
The NEC required series-related installations to be field-marked to indicate the maximum level of fault-current for which the system has been installed.
True
To guard live parts over 50 volts but less than 600 volts, the equipment can be isolated in a room accessible to qualified persons only, located on a balcony, or elevated 8 feet or more above the floor (True/False)
True
Ventilated heating or cooling equipment (including ducts) that service the electrical room or space cannot be installed in the dedicated space above a panelboard or switchboard. (True/False)
True
(220) For each farm building or load supplied by _____ or more branch circuits, the load for feeders, service-entrance conductors, and service equipment shall be computed in accordance with demand factors not less than indicated in Table 220-102.
Two
(240) Fuseholders of the Edison-base type shall be installed only where they are made to accept _____ fuses by the use of adapters.
Type S
(210)Each system _____ conductor, wherever accessible, shall be identified by a separate color coding, marking tape, tagging, or other equally effective means. This applies to multiwire branch circuits when there Is more than one system voltage in a building.
Ungrounded
(230) Each ______ service conductor shall have overload protection.
Ungrounded
(230) The _____ clearances for all service drop conductors shall be based on a conductor temperature of 60 degrees F, no wind; with final unloaded sag in the wire, conductor, or cable.
Vertical
(240) Cartridge fuses and fuseholders shall be classified according to _____ranges.
Voltage and amperage
Entrances to rooms and other guarded locations containing exposed live parts shall be marked with conspicuous ____ forbidding unqualified persons to enter.
Warning signs
Identification of the grounded conductor terminal on a device shall be by a metal or metal coating substantially white in color or the word ______ located adjacent to the identified terminal.
White
The number of conductors permitted in a raceway is dependent on _____(3 things)
area of the raceway, percent area fill allowed, area of the conductors
Annex C does not have a table for liquid tight flexible nonmetallic conduit of the _____ type
black
(210)Multiwire branch circuits shall supply only line to _____ loads
neutral
Working space distances shall be measured from the _____ of equipment or apparatus if such are enclosed
opening.
A single panel or group of panel units designed for assembly in the form of a single panel is called a _______
panelboard
(240) Markings on circuit breakers required by the Code shall be permitted to be made visible by removal of a _____ or cover.
trim
What is the cross-sectional area in square inches for one No. 10 bare solid conductor?
.008 sq. inch
What is the area in square inches of a No. 8 bare solid?
.013
What is the area in square inches for a No. 10 THW?
.0243
How many No. 14 THHN conductors can be pulled through a 4 x 1 ½ square box with a plaster ring of 3.6 cubic inches? The box contains two duplex receptacles, five No. 14 THHN and two grounding conductors.
2
Box Fill Requirements: Each yoke or strap containing one or more devices or equipment is considered as ____ conductors, based on the ______ conductor that terminates on the yoke.
2, largest
How many 4/0 RHH conductors (without outer cover) can be installed in 2 inch intermediate metal conduit?
3
(Article 90)Installations of communications equipment under the exclusive control of communications utilities located outdoors or in building spaces used exclusively for such installations ______ covered by the Code.
Are not
Table 314-16 does not take in to consideration the volume of _____.
Devices, cable clamps, fixture studs or hickeys.
Can a round 4 x ½ box marked as 8 cubic inches with manufactured cable clamps supplied with 14/2 NM be used with a fixture that has two No. 18 TFN and a canopy cover?
Yes
Compliance with the provisions of the Code will result in _____. (Article 90)
an electrical system free from hazard
Box Fill Requirements: One or more fixture studs or hickeys within the box are considered as ____ conductors based on the _____ conductor that enters the box.
1, largest
What is the total cross-sectional area of 1 ¼ inch rigid metal conduit ?
1.526 inches
A junction box contains two 2 ½ inch raceways on the left side and one 2 ½ inch raceway on the right side. The conductors from one 2 ½ inch raceway are pulled through the raceway on the righ wall. The other 2 ½ inch raceway conductors (on the side) are pulled through a 2 ½ inch raceway at the bottom of the pull box. What is the distance from the left wall to the right wall?
20 inches
Raceway Size: A 400 amp feeder is installed in schedule 40 rigid nonmetallic conduit. This raceway contains three 500 kcmil THHN conductors, one 250 THHN conductor and one No. 3 THHN conductor. What size raceway is required for these three conductors?
3 inch
How many No. 1/0 XHHW can be installed in 2" flexible metal conduit?
7
What is the cross-sectional area for one No. 10 RHH without an outer cover?
.0333 sq. inch
What is the area in square inches for a No. 12 RHH (with outer cover)?
.0353
What is the cross -sectional area for one No. 12 RHW conductor with outer cover?
.0353 sq. inch
What is the alternating current resistance of No. 1/0 copper installed in a metal conduit? Conductor length 1000 feet.
.12 ohm
Spare Space Area: An existing one inch liquidtight flexible metal conduit contains two No. 12 THW conductors, two No. 10 THW conductors, and one No. 12 bare (stranded). What is the area remaining for additional conductors?
.2636 for conduit and .4386 for a nipple
A 3 inch schedule 40 PVC raceway contains seven No. 1 RHW conductors without outer cover. How many No. 2 THW conductors may be installed in this raceway with the existing conductors?
11
U-Pull Calculations: The distance from were the raceways enter to the opposite wall must not be less than _____ times the trade diameter of the largest raceway plus the sum of te diameters of the remaining raceways on the same wall.
6
Understanding Chapter 9 Tables: When a raceway does not exceed 24 inches, the raceway is permitted to be filled to _____ of its cross-sectional area.
60%
Number of Conductors in an Outlet Box: Using Table 314-16a, how many No. 14 THHN conductors are permitted in a 4 x 1 ½ round box?
7
It is permitted to omit one equipment grounding conductor and not more than ______ that enter a box from a fixture canopy.
four No. 16 or No. 18 fixture wires
What size square box is required for 6 No. 14 THHN and 3 No. 14 THW?
4 x 1 ¼
Chapter 9, Table ____ can be used when calculating the cross-sectional area of insulated conductors
5
Box Fill Requirements: Wirenuts, cable connectors, raceway fittings and conductors that originate and terminate within the outlet box (such as equipment bonding jumpers and pigtails) are considered _____ conductor .
0
When conduit or tubing does not exceed _____ inches in length, it is called a nipple.
24
(Article 90) The Code applies to the installation of electrical conductors and equipment within or on public and private buildings, of outside conductors and equipment on the premises, and of optical fiber cable. (True,False)
True
Box Fill Requirements: Fixture wires smaller than NO. 14 from a domed fixture or similar canopy are considered as ______ conductor
0
Box Fill Requirements: Each conductor that originates outside the box and terminates or is spliced within the box is considered as ____ conductor.
1
Box Fill Requirements: Each conductor that runs through the box is considered as _____ conductor.
1
Pull Boxes, Junction Boxes and Conduit Bodies must be sized according to Section _____
314.28
A device or group of devices that serves to govern in some predetermined manner the electric power delivered to the apparatus to which it is connected is a ________
Controller
If 1 ¼ inch flexible metal conduit has three THHN conductors (not compact) what is the largest conductor permitted to be installed.
1
Nipple Size: What size rigid metal nipple is required for three NO. 3/0 THHN conductors, one No. 1 THHN conductor, and one No. 6 THHN conductor?
1 ½ inch
What size rigid metal nipple is required for three No. 4/0 THHN, one No. 1/0 THHN and one No. 4 THHN?
1 ½ inch
Box Fill Requirements: One or more grounding conductors are considered ____ conductor based on the ____ grounding conductor that enters the box.
1, largest
Box Fill Requirements: One or more internal cable clamps are considered as _____ conductors based on the ____ conductor that enters the box
1, largest
How many #12 RHH (with outer cover) can be installed in 1" IMC raceway?
11
A junction box contains two 2 inch raceways on the left side and two 2 inch raceways on the top. What is the distance between the 2 inch raceways that contain the same conductors?
12 inches
Pull Box Sizing, Vertical Dimension: A pull box contains two 4 inch raceways on the left and two 2 inch raceways on the top. What is the vertical dimension of the box?
14 inches
A junction box contains two 2 ½ inch raceways on the left side and one 2 ½ inch raceway on the right side. The conductors from one 2 ½ inch raceway are pulled through the raceway on the righ wall. The other 2 ½ inch raceway conductors (on the side) are pulled through a 2 ½ inch raceway at the bottom of the pull box. What is the distance from between the raceways that contain the same conductors?
15 inches
A junction box contains two 2 ½ inch raceways on the left side and one 2 ½ inch raceway on the right side. The conductors from one 2 ½ inch raceway are pulled through the raceway on the righ wall. The other 2 ½ inch raceway conductors (on the side) are pulled through a 2 ½ inch raceway at the bottom of the pull box. What is the distance from the bottom wall to the top wall?
15 inches
Pull Box Sizing, Distance between Raceways: A junction box contains two 3 inch raceways on the left side and one 3 inch raceway on the right side. The conductors from one of the 3 inch raceways on the left are pulled through the 3 inch raceway on the right wall. The other 3 inch raceways conductors are pulled through ta raceway at the bottom of the pull box. What is the minimum distance between the two three inch raceways that contain the same conductors (314-28a-2)?
18
Pull Box Sizing, Vertical Dimension: A junction box contains two 3 inch raceways on the left side and one 3 inch raceway on the right side. The conductors from one of the 3 inch raceways on the left are pulled through the 3 inch raceway on the right wall. The other 3 inch raceways conductors are pulled through ta raceway at the bottom of the pull box. What is the vertical dimension of this box?
18
Pull Box Sizing, Horizontal Dimension: A junction box contains two 3 inch raceways on the left side and one 3 inch raceway on the right side. The conductors from one of the 3 inch raceways on the left are pulled through the 3 inch raceway on the right wall. The other 3 inch raceways conductors are pulled through ta raceway at the bottom of the pull box. What is the horizontal dimension of this box?
24
Pull Box Sizing, Distance between Raceways: A pull box contains two 4 inch raceways on the left and two 2 inch raceways on the top. What is the minimum distance between the two 4 inch raceways that contain the same conductors?
24 inches
Pull Box Sizing, Horizontal Dimension: A pull box contains two 4 inch raceways on the left and two 2 inch raceways on the top. What is the horizontal dimension of the box?
28 inches
A 200 ampere feeder installed in rigid nonmetallic conduit schedule 80, has three No. 3/0 THHN, one No. 2 THHN, and one No. 6 THHN. What size raceway is required?
3
When all conductors are the same size, Table _______ can be used to determine the number of conductors permitted in the outlet box, or determine the size outlet box required for the given number of conductors
314-16a
The actual area of conductor fill is dependent on the raceway size and the number of conductors installed. If there are three or more conductors installed in a raceway, the total area of conductor fill is limited to _____ percent.
40
What size square outlet box is required for: one 12/2 NM cable that terminates on a switch, one 12/3 NM cable that terminates on a receptacle, and the box has manufactured cable clamps.
4x2 1/8
Conductors Added to Existing Box: How many No. 14 THHN conductors can be pulled through a 4 x 2 ½ square box that has a plaster ring 3.6 cubic inches? The box already contains two receptacles, five No. 12 THHN conductors, and one No. 12 bare grounding conductor.
5
Existing Metal Raceways: An existing Rigid metal nipple contains four No. 10 THHN and one No. 10 (bare stranded) ground wire in a 1/2 inch metal conduit. How many additional No. 10 THHN can be installed?
5
Cable treated as 1 conductor can take up to _____% of the cross sectional area of a raceway.
53%
One conductor can take upt o _____% of the cross sectional area of a raceway
53%
Two conductors can take up to _____% of the cross sectional area of a raceway
53%
Angle Pull Calculation (90 degrees, diameter of raceway) must not be less than ___ times the trade diameter of the largest raceway plus the sum of the diameters of the remaining raceways on the same wall of the box.
6
Straight Pull Calculation (length of raceway): The minimum distance from where the raceway enters to the opposite wall must not be less than _____ times the trade size of the largest raceway.
8
(Article 100) Acceptable to the authority having jurisdiction means that the equipment has been _____.
Approved
A separate portion of a conduit or tubing system that provides access through a removable cover(s) to the interior of the system at a junction of two or more sections of the system or at a terminal point of the system is defined as a(n)
Conduit body
A round 3 x 1 ½ box has a volume of 6 cubic inches and has factory internal cable clamps. Can this pancake box be used with a lighting fixture that has a domed canopy? Thee branch circuit wiring is 14/2 NM sheath cable and a paddle fan has three fixture wires and one ground wire all smaller than No. 14
No
Existing Raceway Calculations: What are the three steps to determine raceway cross-sectional spare space area?
Step 1) Determine raceways cross-sectional area for conduit fill Tables 1 and 4, Chapter 9. Step 2) Determine the area of the existing conductors. Step 3) Subtract the cross-sectional area of the existing conductors from the area of permitted conductor fill.
Existing Raceway Calculations, Part 2: What are the two steps to determine the number of conductors permitted in spare space area?
Step 1) Determine the cross-sectional area of conductors to be added. Step 2) Divide the spare space area by the conductors cross-sectional area.
Raceway and Nipple Calculations: Tables are not useful to determine raceway sizing if conductors are of different sizes. What are the three steps for determining raceway and nipple size.
Step 1) cross sectional area of each conductor. Step 2) Cross sectional area for all conductors. Step 3) Size the raceway according to percent fill.
Understanding Chapter 9 Tables: When equipment grounding conductors are installed in a raceway, the actual area of the conductor must be used when calculating raceway fill. T/F
T
(Article 90) Plans and specification that provide ample space in raceways, spare raceways, and additional spaces will allow for future increases in the use of electricity. Distribution centers located in readily accessible locations will provide convenience and safety of operation. (True/False)
True
(Article 90)Explanatory material, such as references to other standards, references to related Sections of the Code or information related to a Code rule is included in the NEC in the form of informational notes. (True/False)
True
For a circuit to be considered a multiwire branch circuit, it must have two or more ungrounded conductors with a potential difference between them, a grounded conductor having equal potential difference between it and each ungrounded conductor of the circuit, and a grounded conductor connected to the neutral (grounded) conductor of the system.(True/False)
True
