For interconnected electric power production sources, a permanent _____, denoting all electric power sources on or in the premises, must be installed at each service equipment location and all interconnected electric power production sources.
a) label
b) plaque
c) directory
d) b or c
See answer and applicable Code reference
The correct answer is: d) b or c
Article 705 covers installation of one or more electric power production sources operating in parallel with a primary source(s) of electricity. As per Sec. 705.10, "A permanent plaque or directory, denoting all electric power sources on or in the premises, shall be installed at each service equipment location and at locations of all electric power production sources capable of being interconnected."