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Red Seal Construction Electrician

Category - Construction Electrician

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12 AWG copper wire has been used to wire a NEMA 14-30R receptacle. What is the maximum size of breaker permitted for the circuit?

15 A
20 A
30 A
50 A

Explanation

Answer: B. Explanation: While the receptacle is rated at 30 A, the maximum ampacity of #12 AWG copper from Table 2 is 20 A, which dictates the maximum breaker size.

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