For permanently connected appliances rated over _____ the branch-circuit circuit breaker can serve as the disconnecting means where the circuit breaker is within sight from the appliance, or is capable of being locked in the open position with a permanently installed locking provision that remains in place with or without the lock installed.
a) 200VA
b) 300VA
c) 400VA
d) 500VA
See answer and applicable Code reference
The correct answer is: b) 300VA
Article 422 covers appliances used in any occupancy. As per the first sentence of Sec. 422.31(B), "For permanently connected appliances rated over 300VA, the branch-circuit switch or circuit breaker shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance or is capable of being locked in the open position."
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.