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Residential Wiring Final Exam Review Questions and Answers
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Residential Wiring Final Exam Review Questions and Answers
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Residential Wiring Final Exam ReviewQuestions and Answers
A(n) _______ is the circuit conductors between the final overcurrent device and the
outlets.
open circuit
branch circuit
feeder circuit
service conductor - Answer -branch circuit
The circuit conductors between the service equipment and the final branch circuit
overcurrent protection device is a(n)
open circuit
branch circuit
feeder circuit
service conductor - Answer -feeder circuit
When doing service entrance calculations, 1 volt-ampere equals
1 joule
1 watt
1 ohm
1 mil - Answer -1 watt
Which of the following is not permitted to be connected to a small appliance branch
circuit?
Refrigerator
Electric clock
Gas stove
Kitchen lighting fixture - Answer -Gas stove
If cables are bundled together for more than 24 inches and the total number of current
carrying conductors exceeds ____________, the ampacity of the conductors must be
derated.
2
3
4
5 - Answer -3
, When doing a standard service entrance calculation, if a residence has 4 fixed
appliances, a demand factor of _______% is applied to the total load of these
appliances
50
75
80
100 - Answer -75
When doing a standard service entrance calculation and applying the demand factor to
the total load of the general lighting load, the small appliance circuits, and the laundry
circuit, the first _____ volt-amperes are computed at 100%
2000
2500
3000
4000 - Answer -3000
A 200 ampere rated panel is designed and manufactured to accommodate ____ circuits
30
40
42
any of the above - Answer -any of the above
Which of the following loads does not require a grounded circuit conductor?
2 wires, 120V
3 wires, 120/240V
2 wires, 240V
none of the above - Answer -2 wires, 240V
All of the following types of branch circuits are found in residential wiring except:
general lighting
laundry
large appliance
small appliance - Answer -large appliance
According to section 310.15(B)(7) in the NEC, the minimum conductor size for a 200-
amp residential service entrance is ______ Cu or _______Al
4 AWG; 2 AWG
3 AWG; 1 AWG
2 AWG; 1/0 AWG
2/0 AWG; 4/0 AWG - Answer -2/0 AWG; 4/0 AWG
According to section 310.15(B)(7) in the NEC, the minimum conductor size for a 300-
amp residential service entrance is ______ Cu or _______Al
2 AWG; 1/0 AWG
2/0 AWG; 4/0 AWG
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