Code Quiz of Day

Control Space Lighting Requirements

April 16, 2015

Branch circuit wiring requirements for machine room or control room/machinery space or control space lighting and receptacles are outlined in Sec. 620.23.

Mike Holt

A separate branch circuit shall supply elevator machine room/machinery space lighting and receptacle(s). The required lighting shall not be connected to the load side of a(n) _____.

a) local subpanel
b) SWD type circuit breaker
c) HID type circuit breaker
d) GFCI

See answer and applicable Code reference

The correct answer is: d) GFCI

Article 620 covers the installation of electrical equipment and wiring used for elevators, dumbwaiters, escalators, moving walks, platform lifts and stairway chair lifts. Branch circuit wiring requirements for machine room or control room/machinery space or control space lighting and receptacles are outlined in Sec. 620.23. As per the second sentence in 620.23(A), "Required lighting shall not be connected to the load side of a ground-fault circuit interrupter."

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.