NM Electrical Inspector (General) Practice Questions - New Mexico CID Electrical Inspector (General) Examination Exam

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Using the 10-foot feeder tap rule of NEC 240.21(B)(1), tap conductors from a 400-ampere feeder must have an ampacity not less than which of the following, in addition to serving the computed load and terminating in a single overcurrent device?

5 percent of the feeder overcurrent-device rating 10 percent of the feeder overcurrent-device rating 25 percent of the feeder overcurrent-device rating One-third of the feeder overcurrent-device rating

Correct Answer:

10 percent of the feeder overcurrent-device rating

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