The standard single-phase AC service is normally rated 120/240-volt, 3-wire.
In terms of voltmeter measure, the line voltage of _________ volts can be measured only between the ungrounded busses or from circuits supplied from the two ungrounded busses.
The neutral voltage of _________ volts can be measured between either of the ungrounded busses or from any circuit conductor connected to one of the ungrounded busses and the common grounded neutral bus.
A) 120; 240
B) 240; 240
C) 120; 120
D) 240; 120
Share your understanding of this question with the correct explanation.