Branch Feeder Circuits Questions and Correct
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Quiz: According to the NEC®, the ampacity of branch circuit conductors
must be derated when there are more than how many current-carrying
conductors in a raceway?
Ans: 3
Quiz: Air conditioning overcurrent protective devices can never exceed what
percentage of the motor-rated load current or the branch circuit selection
current (whichever is greater)?
Ans: 225%
Quiz: Conductors must be derated when installed in conduit
Ans: on or above rooftops
Quiz: Continuous loads are calculated at what percentage of the maximum
current rating of the overcurrent device?
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, Ans: 80%
Quiz: For a given load and length, the branch circuit voltage drop should not
exceed
Ans: 3%
Quiz: For resistance welders, the rating for the overcurrent protection
device should not exceed what percentage of the primary current rating of the
welder?
Ans: 300%
Quiz: Show window lighting is calculated at 200VA per linear foot plus
Ans: 125%
Quiz: The allowable ampacity for eleven No. 12 THHN copper conductors in
a cable must be adjusted by
Ans: 50%
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