A 7200 to 4160 V three-phase transformer 150 kVA in a supervised location is fed from a feeder tap protected by a three-phase fused safety switch. The transformer supplies power to a circuit breaker in an enclosure. According to NEC 450.3, the maximum size of the circuit breaker in the enclosure is ___ amps.

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Prepare for the Independent Electrical Contractors (IEC) Year 4 Exam. Access flashcards, multiple choice questions, and detailed explanations. Enhance your readiness and achieve your certification!

Multiple Choice

A 7200 to 4160 V three-phase transformer 150 kVA in a supervised location is fed from a feeder tap protected by a three-phase fused safety switch. The transformer supplies power to a circuit breaker in an enclosure. According to NEC 450.3, the maximum size of the circuit breaker in the enclosure is ___ amps.

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