NEC Questions Practice Test-3
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Free Online Practice Test on NEC Code Objective Questions
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Question 1 of 10
1. Question
The rated ampacity of a 1/0 THWN in a wet location is 150 amperes. If the same conductor is operated at ambient temperature of 400C. What is its corrected ampacity?
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Temperature correction factor of 1/0 THWN Conductor for 40-750 C = 0.88
The corrected ampacity = 0.88 * 150 = 132 amperes -
Question 2 of 10
2. Question
When eight three wire type AC cables are bundled in a raceway of length more than 24 inch. what is the adjustment factor that must be applied?
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Question 3 of 10
3. Question
The flexible cords employed for pool associated motors shall not exceed ………….. feet in length.
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Refer : NEC 680.21 A 5
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Question 4 of 10
4. Question
Whether by receptacle or direct connection the outlets supplying pool pump motors shall be provided with …………………………………… protection
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Refer : NEC 680.21 (C)
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Question 5 of 10
5. Question
When a conduit run passing from a Class I , Division 2 location into a unclassified location must have seal located with …………….. feet of the boundary.
Correct
Refer: NEC 501.15 B 2
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Question 6 of 10
6. Question
If a panel board is supplied by a transformer. The over current device must be located …………. side of the transformer
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Question 7 of 10
7. Question
Which of the following is the maximum rating of a branch circuit that supply the primary of low voltage lighting system power supply?
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Refer: NEC 411.6
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Question 8 of 10
8. Question
A lighting unit is connected on a 20 ampere branch circuit on which a fastened-in place appliance is located. What is the maximum percentage branch circuit rating is permitted on the appliance?
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Refer : NEC 210.23(A)(2)
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Question 9 of 10
9. Question
Which of the following is the smallest size wire permitted for a feeder circuit?
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Question 10 of 10
10. Question
When two or more single phase electric ranges are supplied by a 3 phase , 4 wire feeder, the total load computed is on the basis of ………………………….
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Refer: NEC 250.55