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

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A 10-horsepower, 460-volt, three-phase induction motor is supplied by a branch circuit. Using NEC Table 430.250 and 430.22, what is the minimum conductor ampacity, and what is the maximum inverse-time circuit breaker permitted by Table 430.52 before any exception?

14 amperes ampacity and a 20-ampere breaker 17.5 amperes ampacity and a 35-ampere breaker 28 amperes ampacity and a 70-ampere breaker 14 amperes ampacity and a 15-ampere breaker

Correct Answer:

17.5 amperes ampacity and a 35-ampere breaker

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