In the 480Y/277-volt, 3-phase AC, 4-wire building or other-structure electrical-power distribution systems, the 3-phase line voltage is ___ volts; the lower single-phase neutral voltage is ___ volts

Multiple Choice Questions Electrical MCQ
1

In the 480Y/277-volt, 3-phase AC, 4-wire building or other-structure electrical-power distribution systems, the 3-phase line voltage is _________ volts; the lower single-phase neutral voltage is _________ volts.

A) 480; 480
B) 277; 480
C) 277; 277
D) 480; 277

Show Answer

Answer:D

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