Equipment for General Use (NEC 400) Practice Questions-1
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Free NEC 400: Equipment For General Use Practice Questions-1
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Question 1 of 10
1. Question
1 pointsWhich of the following is the minimum approved wire size that is permitted for a device which is permanently attached to the building?
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Refer : NEC 402.6
( Fixture wires shall not be smaller than 18 AWG)
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Question 2 of 10
2. Question
1 pointsThe dust breaker shall not be installed on …………………….
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Refer : NEC 408.36 (C)
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Question 3 of 10
3. Question
1 pointsIf a 20 amp branch circuit supplies only 120 volt cord and plug type window air conditioner cannot have full load rating of which of the following?
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Incorrect
Refer: 440.62 (B)
When one window air-conditioner is supplied by a branch circuit then maximum full load rating 80% of branch circuit rating
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Question 4 of 10
4. Question
1 pointsA Transformer vault doorway that is protected with automatic sprinkler, water spray shall have a minimum fire rating of ………………….
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Question 5 of 10
5. Question
1 pointsEven if the Ground Fault interrupter protection is provided for impedance heating elements, What is the maximum transformer secondary voltage permitted?
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Question 6 of 10
6. Question
1 pointsFixed outdoor electric deicing and snow melting equipment shall be considered as ………………
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Question 7 of 10
7. Question
1 pointsWhich of the following is an allowable ampacity of an 10 AWG fixture wire?
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Refer : NEC Table 402.5
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Question 8 of 10
8. Question
1 pointsWhich of the following is the nominal voltage of lead-acid cell?
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Refer : NEC 480.2
Nominal battery cell voltages
Lead-acid cell = 2 volts
Alkali cell = 1.2 volts
Li-ion cell = 4 volts
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Question 9 of 10
9. Question
1 pointsWhich of the following is a 300 volts motor disconnecting means?
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Question 10 of 10
10. Question
1 pointsWhich of the following is not a rating of a branch circuit used for electric space heaters installed in dwelling family unit?
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Incorrect
Refer : NEC 424.3
Branch circuits used for fixed electric space-heating equipment shall be rated 15, 20, 25, or 30 amperes.