iec year 2, quarter 2 final exam
What is the code refrence for minimum depth of clead working space at electrical equipment?
110.26(A)(1)
When installing more than 2 conductors in a 50 foot run of 3 inch intermediate metal conduit, the maximum area that can be filled with conductors is ___ square inches. A. 7.922 B. 3.169 C. 4.753 D. 3.176
3.169
what table in the nec covers minimum burial requirements?
300.5(A)
what table in the nec is used to decide wire spacing in a cabinet?
312.6(A) or 312.6(B)
What table in the NEC is used to determine allowable volume in metal boxes for box fill?
314.16 (A)
Where loads are likely to be ON for 8 hours, the computed load for sizing branch circut conductors and OCPDs .ust be calculated by multiplying the actual load by ___%. A. 125 D. 80 C. 100 D. 150
A. 125 %
What is the circular mil area of a 3/0 conductor? A. 167,000 B. 211,600 C. 52,620 D. 105,600
A. 167,800
The smallest permissable wire size for branch circuit conductors supplying other than cooking appliances is ___ AWG according to the NEC. A. 18 B. 12 C. 16 D. 14
A. 18 awg
What is the minimum number if 20 ampere branch circuts for small appliances required in a residence? A. 2 B. 3 C. 1 4. 6
A. 2
For purposes of calculating a residential service, the general purpose lighting load is calculated at ___ volt amperes per square foot of area. A. 3 volt amperes B. 1 volt ampere C. 1500 watts D. 2 volt amperes
A. 3 volt amperes
Fastened in place utilization equipment that is connected to a branch circut with other loads shall not exceed ___ percent of the branch circuit rating. A. 50 B. 80 C. 75 D. 100
A. 50
In a single family dwelling the recepticles shall be installed so that no point measured along the floorlone is more than ___ ft. to the nearest outlet. A. 6 B. 4 C. 2 D. 12
A. 6
Lengths of flexible metal conduit longer than ___ feet are not acceptable as an equipment grounding conductor. In such cases a seperate bonding jumper ks required to be run outsideof the flexible conduit to maintain the continuity of the grounding path. A. 6 B. 10 C. 4 1/2 D. 3
A. 6
Select the size of the aluminium equipment grounding conductor required for a circut protected by a 70 ampere fuse A. 6 awg B. 8 awg C. two 8 awg D. 10 awg
A. 6 awg
The ampacity of types NM and NMC cable shall be that of ___ C conductors. A. 60 B. 90 C. 140 D. 75
A. 60
Which of the following is not a standard circut breaker size? A. 75 B. 110 C. 50 D. 25
A. 75
Although a residential basement is unfinished, the homeowner wants several receptacles to be installed. These receptacles are required to be ___. A. GFCI protected B. connected to the same circut C. AFCI protected D. all of these
A. GFCI protected
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 resturant A. II and III only B. I and III only C. I, II, and III D. II only E. III only
A. II and III only
The neutral conductor of a 120 volt circut js referred to as the ___ conductor in the nec A. grounded B. shared C. ungrounded D. grounding
A. grounded
Transient voltage surge suppressors are used to minimize the damage to connected equipment caused by ___. A. line surges and spikes B. overloads C. immersion in water D. rough usage
A. line surged and spikes
Along a kitchen countertop in a restaurant, the maximum spacing between receptacles is ___. A. not specified B. 2 feet C. 12 feet D. 6 feet E. 4 feet
A. not specified
In general, a building or structure shall be supplied by only ___ services. A. one B. two C. three D. as many as directed
A. one
Which of the following may not be used in damp or wet locations. A. type AC armored cable B. ridged metal conduit C. open wiring D. electrical metal tubing.
A. type AC armored cable
RMC is the wiring method. 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 to the box is ___ inches or less. A. 12 B. 18 C. 6 D. 36
B 18 inches
A unit load of ___ volt amperes per square foot shall be used when calculating the lighting load of a resturant. A. 180 B. 1.5 C. 3 D. 2
B. 1.5
XHHW 500 kcmil conductors have an insulation that is ___ mm thick. A. 2.03 B. 1.65 C. 2.41 D. 1.78 E. 1.52
B. 1.65
An overhead feeder is to be installed to a residential garage. The conductors are insulated and have a voltage of 120 volts to ground. This circut doss not pass over a sidewalk or driveway. what is the minimum height above the ground that must be maintained. A. 15 feet B. 10 feet C. 12 feet D. 8 feet
B. 10 feet
For a one family dwelling, the service disconnecting means shall have a rating of not less than ___ amperes, 3 wire. A. 150 B. 100 C. 30 D. 60
B. 100 amperes
The minimum feeser circut conductor size,before the application of any adjustment or correction factors, shall have an allowable ampacity equal or greater than the noncontinuous load plus ___ percent of the continuous load. (215.2 (2)(C)) A. 80 B. 125 C. 100 D. 75
B. 125
Underground service conductors that are not encased in concrete and that sre 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. A. 30 in B. 18 in C. 3 feet D. 2 feet
B. 18 inches
300kcmil 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 is ___ awg A. 6 B. 3 C. 2 D. 4 E. 1
B. 3
What minimum size schedule 80 PVC conduit is required for a 65 foot run? the conduit will contain three 35p kcmill, one 3/0, and one #2 THHN/THWN conductors. A. 2.5 B. 3 C. 4 D. 5 E. 3.5
B. 3
What is the minimum bend radius for 1 inch diameter corrugated sheath MC cable? A. 15 inch B. 7 inches C. 12 inches D. 10 inches
B. 7 inches
Compared to schedule 40, Schedule 80 PVC ___. I. has a thicker wall II. can be used where subject to physical damage III. has a smaller cross sectional area for fill purposes. A. III only B. I, II and III C. II and III only D. I and III only E. II only
B. I, II, and III
The grounded conductor of a branch circut that is 6 awg or smaller shall be ___. I. without splices II. white or gray in color A. 1 only B. II only C. both I & II D. neither I or II
B. II only
A duplex recepticle with two circuts on the same yoke is permitted to have ___ as a means of disconnect. I. two single pole circut breakers without handleties II. one double pole circut breaker III. two single pole circut breakers with handle ties A. I or II only B. II or III only C. II only D. III only E. I or II or III
B. II or III only
You need to get power to a 208 volt load. your avaliable power is from a 120/240 volt, 3 phase, 4 wire panelboard. is it permitted for you to run a branch circut from the neutral bar and a 1 pole circut breaker installed in space #4? the CB has a 120 volt rating. A. yes B. No
B. No
Which chapters in the code apply generally? A. chapters 5 - 7 B. chapters 1 - 4 C. chapter 8 D. chapters 1 - 9
B. chapters 1 - 4
Where installed in a metal raceway, all feeder conductors sharing common neutral conductor shall be ___. A. shielded B. enclosed within the same raceway C. insulated for 600 volts D. the same color
B. enclosed within the same raceway
The definition of a branch circut is ___. A. a conductor encased within material of composition and thickness that is recognized by this code as electrical insulation B. the circut conductors between the final overcurrent device protecting the unit and the outlets C. acceptable to the authority having jurisdiction D. the connection between the grounded circuit conductor and the equipment grounding conductor at the service
B. the circut conductors between the final overcurrent protection device protecting the circut and outlets
Where installed in a 3 pole, 600 volt fused safety switch, the minimum number of fuses required to protect a 120 volt 1 phase, 2 wire branch circuit is ____. A. 3 B. 2 C. 1
C. 1
Non combustable surfaces that sre broken or incomplete shall be repaired so there will be no gaps or open spaces greater than ___ inch at the edge of the fitting box. A. 3/16 B. 1/16 C. 1/8 D. 1/4
C. 1/8
PVC shall not be permitted where subject to ambient temperature in excess of ___ degrees F unless listed otherwise. A. 143 B. 126 C. 122 D. 115
C. 122
What is the cubic inch allowance for a 10 awg conductor? A. 1.5 B. 3.00 C. 2.50 D. 2.00
C. 2.50
A section of 8" X 8" wireway is shown i figure 208.61. The maximum number of 2/0 awg THHN/THWN conductors that can be installed in the wireway is ___. A. 12 B. 30 C. 56 D. 115 E. 13
C. 57
Where multiple rod, pipe, or plate electrodes are installed, they shall not be less than ___ apart. A. 8 feet B. 10 feet C. 6 feet D. 2 feet E. 18 inches
C. 6 feet
Circut breakers and switches containing fuses shall be readily accessable 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. A. 5 feet, 8 inches B. 6 feet C. 6 feet, 7 inches D. 6 feet, 8 inches
C. 6 feet, 7 inches
When installed in raceways, conductors ___ awg and larger shall be stranded. A. 3 B. 4 C. 8 D. 6
C. 8
A(n) ___ shall be used to connect the grounding terminal of a grounding type recepticle to a grounded box. A. a neutral conductor B. main bonding jumper C. equipment bonding jumper D branch circuit
C. equipment bonding jumper
Informational notes ( I-notes) in the national electric code are ___. A. optional B. mandatory C. explanitory information (not mandatory) D. legally binding
C. explanatory information (not mandatory)
In NEC 210.52 (A)(1), the 6 foot rule for spacing recepticles applies to all the following areas of a house, except for ___. A. master bedrooms B. recreation rooms C. hallways D. dining rooms
C. hallways
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. A. 0 B. triple C. single D. double
C. single
The largest conductor permitted in 3/8 Flexible conduit is ___ awg. A. 14 B. 12 C. 16 D. 10
D. 10
Arc fault requirements for dwelling units are found in section ___. A. 210.8 B. 210.15 C. 210.11 D. 210.12
D. 210.12
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. A. 25 B. 15 C. 20 D. 30
D. 30
The minimum demand for an electric clothes dryer in a residential load calculation is ____ watts A. 3000 B. 2000 C. 1500 D. 5000 E. 6000
D. 5000 watts
A nipple contains four 6 awg THW copper current carrying conductors. The ampacity of each conductor would be ___ amperes. A. 52 B. 44 C. 55 D. 65
D. 65
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 ___. (22].55) A. 8 kW B. 9.5 kW C. 12 kW D. 7.8 kW
D. 7.8 kW
If the equipment terminals are listed for 75 degree C, what size THHN conductors are required for a 50 ampere circut? A. 6 awg B. 10 awg C. 8 awg
D. 8 awg
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. A. green B. gray C. yellow D. orange
D. Orange
Which of the following could be used in a concrete slab? A. LFMC B. ENT C. Schedule 40 PVC D. all of these E. none of these
D. all of these
the authority having jurisdiction has the responsibility ___. A. for enforcing the NEC B. for approving equipment installations C. for granting special permission D. all of these E. none of these
D. all of these
The cross sectional area of a 4 AWG bare copper conductor is ___ cmils. A. 16510 B. 52620 C. 66360 D. 26240 E. 41740
E. 41740
Live vegitation, such as trees, may support overhead conductor spans. True or False?
False
