Blog

A ______ conductor that carries only the unbalanced current from other conductors of the same circuit shall not be required to be counted when applying the provisions of 310.15(C)(1).

A separate overload device used to protect continuous-duty motors rated more than 1 hp shall be selected to trip at no more than _____ percent of the motor nameplate full-load current rating if marked with a service factor of 1.16.

The maximum rating or setting of an inverse time breaker used as the motor branch-circuit short-circuit and ground-fault protective device for a single-phase motor is _____ percent of the full-load current given in Table 430.248.

How many conductors in a junction box shall be counted for one single pole switch, one three-way switch, three internal cable clamps, and three grounding conductors?

If the secondary voltage of a delta/delta transformer is 120/240V, the high-leg voltage-to-ground (or neutral) is approximately _____.

Conductor derating factors shall not apply to conductors in nipples having a length not exceeding _____

Which is the highest rated FLC of the following?

Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so _____.

The size of the grounding electrode conductor for a single separetely derived system must not be smaller than that identified in _____, based on the area of the largest derived ungrounded supply conductor.

A delta-connected three-phase alternator is driving a wye-connected resistive load. The alternator output voltage is 240 V. The load resistors are 12 ohms each. What is the phase current in the alternator?