Based on the 2017 NEC
Q. What are the NEC branch circuit rating requirements for individual appliances?
See the answer below.
A. (A) Individual Circuits [422.10]. The branch-circuit ampere rating for an individual appliance isn’t permitted to be less than the branch-circuit rating marked on the appliance [Sec. 110.3(B)]. The branch-circuit rating for motor-operated appliances must be in accordance with Sec. 430.6(A) and Sec. 430.22. A branch-circuit for an appliance that’s a continuous load must be rated not less than 125% of the marked ampere rating of the appliance [Sec. 210.19(A)(1)].
Branch circuits for household ranges and cooking appliances can be sized in accordance with Table 220.55 and Sec. 210.19(A)(3).
(B) Circuits Supplying Two or More Loads [Sec. 422.10(B)]. Branch circuits supplying appliances and other loads must be sized in accordance with the following:
• Cord-and-plug-connected equipment must not be rated more than 80% of the branch-circuit ampere rating [Sec. 210.23(A)(1)].
• Equipment fastened in place must not be rated more than 50% of the branch-circuit ampere rating, if the circuit supplies both luminaires and receptacles [Sec. 210.23(A)(2)].
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.