A single _____ shall not be used for more than one branch circuit, one multiwire branch circuit, or one set of feeder conductors except as allowed elsewhere in the Code.
a) equipment grounding conductor
b) neutral conductor
c) grounding electrode conductor
d) bonding conductor
See answer and applicable Code reference
The correct answer is: b) neutral conductor
Article 200 focuses on the use and identification of grounded conductors. As outlined in Sec. 200.4, "Neutral conductors shall not be used for more than one branch circuit, for more than one multiwire branch circuit, or for more than one set of ungrounded feeder conductors unless specifically permitted elsewhere in this Code."