Code Quiz of Day

Protecting Cellular Metal Floor Raceways

June 18, 2015

Inserts for cellular metal floor raceways shall be leveled to the floor grade and sealed against the entrance of _____.

a) concrete
b) water
c) moisture
d) all of the above

See answer and applicable Code reference

The correct answer is: a) concrete

Article 374 covers the use and installation requirements for metal floor raceways. As noted in Sec. 374.10, "Inserts shall be leveled to the floor grade and sealed against the entrance of concrete. Inserts shall be of metal and shall be electrically continuous with the raceway."

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.