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 ...
When working with electrical systems, including multi-conductor cables, identification of conductors is an important issue. For example, on a new 480/277V, 3-phase, 4-wire system, the NEC requires you ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback