No _____ shall be attached to any terminal or lead so as to reverse designated polarity.
a) grounded conductor
b) grounding conductor
c) ungrounded conductor
d) grounding connector
See answer and applicable Code reference
The correct answer is: a) grounded conductor
Chapter 2 of the NEC focuses on wiring and protection methods. The use and identifcation of grounded conductors is outlined in Art. 200. As per 200.11, "No grounded conductor shall be attached to any terminal or lead so as to reverse the designated polarity."