Q. What are the Code rules for the connection of in-sink waste disposal units when using a flexible cord?
See answer below.
A. As outlined in Sec. 422.16(B)(1), a flexible cord is permitted for an in-sink waste disposal unit if:
(1) The flexible cord has a grounding‑type attachment plug. Exception: A listed in‑sink waste disposal marked as protected by a system of double insulation isn’t required to be terminated with a grounding‑type attachment plug.
(2) The flexible cord length is at least 18 in. in length and no longer than 3 ft.
(3) The receptacle must be located so as to protect against damage to the flexible cord.
(4) The receptacle is accessible.
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.