NEC Questions Practice Test-2
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Free Online Practice on NEC code Questions – 2
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Question 1 of 10
1. Question
A 2/0 THWN conductor is placed in a dry location where the ambient temperature is 450C. What is corrected ampacity of the conductor?
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Ampacity of 2/0 THWN conductor in dry location = 195 A ( NEC Table 310.15 (B)(16))
Correction Ampacity at ambient temperature 450 C = 0.87 (NEC Table 310.15(B)(2))
Correrted Ampacity of conductor = 0.87 * 195 = 170 Amperes -
Question 2 of 10
2. Question
Which of the following locations Type AC cable cannot be used?
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Refer : NEC 320
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Question 3 of 10
3. Question
When a single generator is used to supply emergency load plus other loads, a single transfer switch can be sufficient to use.
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Refer : NEC 700.5 (D)
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Question 4 of 10
4. Question
Mutli-wire branch circuits shall be permitted in class I division I locations.
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Refer: NEC 501.40
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Question 5 of 10
5. Question
Proper Grounding in electrical circuit limits …………….. and protects the circuit.
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Question 6 of 10
6. Question
The branch circuits that are connected to luminaries of dwelling units shall have maximum voltage of ………………
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Refer : NEC 210.6 A
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Question 7 of 10
7. Question
The ampacity of the branch conductor that supplies a power supply to the motor which has FLC of 25 amperes is ……………
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Conductor ampacity = 125% of FLC = 1.25 * 25 = 31.25 amperes
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Question 8 of 10
8. Question
Branch circuits and feeders to motor controllers, driving machines shall not exceed of…….. volts
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Refer : NEC 620.3(A)
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Question 9 of 10
9. Question
What is the maximum ampere rating of a power supply feeder of mobile homes?
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Refer: NEC 550.10
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Question 10 of 10
10. Question
Dispensing devices for liquefied petroleum gas shall be located not less than …………….. feet from any dispensing device for Class I liquids
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Refer : NEC 514.3(B)(2)