Flexible Cords and Fixture Wires ( NEC 450) Practice Test
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Free online practice test on Flexible cords and Fixture Wires (NEC CODE 450) Objective Questions.
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Question 1 of 8
1. Question
1 pointsFlexible cord or cable cannot be used in place of permanent wiring.
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Question 2 of 8
2. Question
1 pointsWhen eight 16A current carrying conductors are grouped in to a flexible cord. What is the allowable ampacity of each conductor?
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Refer : NEC Table 400.5(A)(3).
For 7-9 conductors the adjustment factor is 70%
So allowable ampacity = 16 * 0.7 = 11.2 amperes
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Question 3 of 8
3. Question
1 pointsWhich of the following places the flexible cords cannot be used?
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Question 4 of 8
4. Question
1 pointsThe over current devices for flexible cords or cables must not be rated …………………………..
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Question 5 of 8
5. Question
1 pointsWhich of the following is the minimum size of fixture size that can use for wiring control circuits?
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Refer NEC 402.6
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Question 6 of 8
6. Question
1 pointsWhat is the allowable ampacity of a 10 AWG Fixture wire?
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Refer NEC Table 402.5
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Question 7 of 8
7. Question
1 pointsUnless it is permitted the conductors cannot be used for the following wiring?
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Question 8 of 8
8. Question
1 pointsWhen 5 current carrying conductors are equipped in the flexible cord, which percentage of rated ampacity is allowed for each conductor?
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Refer: NEC Table 400.5(A)(3).
Allowable percentage for 4-6 conductors is 80%