Appliance Branch-Circuit Overcurrent Protection

Article 422 covers electrical appliances used in any occupancy.

March 10, 2015

If a protective device rating is marked on an appliance, the branch-circuit overcurrent device rating shall not exceed ___ % of the protective device rating marked on the appliance.

a) 50
b) 80
c) 100
d) 115

See answer and applicable Code reference

The correct answer is: c) 100

Article 422 covers electrical appliances used in any occupancy. As noted in Sec. 422.11(A), "Branch circuits shall be protected in accordance with 240.4." If a protective device rating is marked on an appliance, the branch-circuit overcurrent device rating shall not exceed the protective device rating marked on the appliance."

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.