Grounding Electrode Requirements at Separate Building or Structure

The grounding and bonding rules for buildings or structures supplied by a feeder(s) or branch circuit(s) can be found in Sec. 250.32 of the 2011 NEC.

May 15, 2014

A grounding electrode at a separate building or structure shall be required where one multiwire branch circuit serves the building or structure.

a) True
b) False

See answer and applicable Code reference

The correct answer is: b) False

The grounding and bonding rules for buildings or structures supplied by a feeder(s) or branch circuit(s) can be found in Sec. 250.32 of the 2011 NEC. As noted in the Exception in 250.32(A), "A grounding electrode shall not be required where only a single branch circuit, including a multiwire branch circuit, supplies the building or structure and the branch circuit includes an equipment grounding conductor for grounding the normally non-current-carrying metal parts of equipment."