Code Quiz of Day

Testing Your Cable IQ

Sept. 30, 2014

Do you know the allowable cable types for this type of installation?

Type _____ cable is a factory assembly of insulated conductors under a nonmetallic sheath for installation in cable trays or raceways.

a) NM
b) TC
c) SE
d) UF

See answer and applicable Code reference

The correct answer is: b) TC

Do you know the allowable cable types for this type of installation? Article 336 covers the use, installation, and construction specifications for power and control tray cable (Type TC). This type of cable consists of "a factory assembly of two or more insulated conductors, with or without associated bare or covered grounding conductors, under a nonmetallic jacket."

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.