Code Q&A: Lockable Disconnecting Means

NEC guidelines on lockable disconnecting means

Jan. 22, 2015

Q. When the Code requires lockable disconnecting means, what does this mean?

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A. Where the Code requires that a disconnecting means is lockable in the open position, the provisions for locking must remain in place whether the lock is installed or not [110.25].

Exception: Locking provisions for cord- and plug-connected equipment don’t need to remain in place without the lock installed.

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.