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Code Q&A: Dwelling Unit Standby Generator Requirements

March 9, 2022

Test your knowledge of the NEC.

Courtesy of www.MikeHolt.com.

Based on the 2020 NEC.

Q. What are the Code rules for disconnecting means and emergency shutdown of standby generators in one- and two-family dwelling units?

See answer below.

A. For other than cord-and-plug-connected portable generators, an emergency shutdown device must be located outside the dwelling unit at a readily accessible location [Sec. 445.18(D)].

This rule aligns with similar emergency shutdown dwelling unit requirements for services to be located outside in a readily accessible location per Sec. 230.85.

These materials are provided to us by Mike Holt Enterprises in Leesburg, Fla. To view Code training materials offered by this company, visit www.mikeholt.com/code.

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.