Code Q&A

Q. Can a stranded 12 AWG wire be placed under the screws for receptacles and switches? A. Conductor terminations must comply with manufacturer’s instructions as required by 110.3(B). For example, if the instructions for the device state “Suitable for ...

Mike Holt

Aug. 23, 2005

Q. Can a stranded 12 AWG wire be placed under the screws for receptacles and switches?

A. Conductor terminations must comply with manufacturer’s instructions as required by 110.3(B). For example, if the instructions for the device state “Suitable for 18-2 AWG Solid,” then only solid conductors are permitted. If the instructions do not specify "solid" such as, “Suitable for 18 - 12 AWG,” then either solid or stranded conductors can be used with the terminating device.

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.