Code Quiz of Day

Listed Cable Suitable for Use Under Raised Floors of ITE Rooms

Feb. 16, 2015

Section 645.5(E) focuses on supply circuits and interconnecting cables placed under raised floors in an information technology equipment room.

Mike Holt

Interconnecting cables under raised floors that support information technology equipment shall be Type _____.

a) RF
b) UF
c) LS
d) DP

See answer and applicable Code reference

The correct anser is: d) DP

Article 645 covers equipment, power-supply wiring, equipment interconnect wiring, and grounding of information technology equipment and systems in an information technology equipment room. Section 645.5 focuses on supply circuits and interconnecting cables. As per 645.5(E)(6)a, "Listed Type DP cable having adequate fire-resistant characteristics suitable for use under raised floors of an information technology equipment room".

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.