A. A fuse or circuit breaker must be connected in series with each ungrounded conductor [240.15(A)]. Circuit breakers must automatically (and manually) open all ungrounded conductors of the circuit, ...
A fuse or the overcurrent trip unit of a circuit breaker must be connected in series with each ungrounded conductor [NEC Sec. 240.15(A)]. Also, the breaker must open all ungrounded conductors of the ...
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