Code Quiz of Day

Identification of Grounded Conductor

June 8, 2015

Grounded conductors ______ and larger can be identified by distinctive white or gray markings at their terminations.

a) 10 AWG
b) 8 AWG
c) 6 AWG
d) 4 AWG

See answer and applicable Code reference

The correct answer is: d) 4 AWG

Article 200 provides requirements for the use and identification of grounded conductors. As noted in Sec. 200.6(B)(4), An insulated grounded conductor 4 AWG or larger shall be identified at the time of installation by a distinctive white or gray marking at its terminations. This marking shall encircle the conductor or insulation.

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.