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."
About the Author
Mike Holt
Mike Holt is the owner of Mike Holt Enterprises (www.MikeHolt.com), one of the largest electrical publishers in the United States. He earned a master's degree in the Business Administration Program (MBA) from the University of Miami. He earned his reputation as a National Electrical Code (NEC) expert by working his way up through the electrical trade. Formally a construction editor for two different trade publications, Mike started his career as an apprentice electrician and eventually became a master electrician, an electrical inspector, a contractor, and an educator. Mike has taught more than 1,000 classes on 30 different electrical-related subjects — ranging from alarm installations to exam preparation and voltage drop calculations. He continues to produce seminars, videos, books, and online training for the trade as well as contribute monthly Code content to EC&M magazine.