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Code Quiz: Definition of Voltage to Ground

May 7, 2015
What does voltage to ground really mean?

As per the definition in Art. 100 of the 2014 NEC, what is the voltage to ground value on a circuit in a 480V ungrounded system.

A)  240VAC

B)  277VAC

C)  480VAC

D)  208VAC

Find the Answer

Answer: C

For ungrounded circuits, “voltage to ground” is defined as “the greatest voltage between the given conductor and any other conductor of the circuit.”

Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at [email protected].

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Steven Owen

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