Code Q&A

Oct. 9, 2008

Our utility requires a nonfused disconnect upstream of the meter and service disconnect for certain services. Is this legal?

Mike Holt

Q. Our utility requires a nonfused disconnect upstream of the meter and service disconnect for certain services. Is this legal?

A. Yes, meter disconnect switches that have a short-circuit current rating (SCCR) equal to or more than the available short-circuit current can be installed ahead of the service disconnecting means. A meter disconnect switch must be capable of interrupting the load served [230.82(3)]. Electric utilities often require a meter disconnect switch for 277/480V services to enhance safety for utility personnel when they install or remove a meter.

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.