Code Quiz of Day

Minimum Conductor Size for Motion Picture Equipment

Feb. 4, 2015

The provisions of Article 540 apply to motion picture projection rooms, motion picture projectors, and associated equipment.

Mike Holt

Conductors supplying outlets for arc and xenon projectors of the professional type shall not be smaller than _____ and shall have an ampacity not less than the projector rating.

a) 12 AWG
b) 10 AWG
c) 8 AWG
d) 6 AWG

See answer and applicable Code reference

The correct answer is: c) 8 AWG

The provisions of Article 540 apply to motion picture projection rooms, motion picture projectors, and associated equipment. As noted in Sec. 540.13, "Conductors supplying outlets for arc and xenon projectors of the professional type shall not be smaller than 8 AWG and shall have an ampacity not less than the projector current rating. Conductors for incandescent-type projectors shall conform to normal wiring standards as provided in 210.24."

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.