Antenna conductors for amateur transmitting stations attached to buildings shall be firmly mounted at least _____ in. clear of the surface of the building on nonabsorbent insulating supports.
a) 1
b) 2
c) 3
d) 4
See answer and applicable Code reference
The correct answer is: c) 3
Article 810 covers the installation requirements for radio and television equipment. As noted in Sec. 810.54, "Antenna conductors for transmitting stations, attached to buildings, shall be firmly mounted at least 3 in. clear of the surface of the building on nonabsorbent insulating supports, such as treated pins or brackets equipped with insulators having not less than 3-in. creepage and airgap distances. Lead-in conductors attached to buildings shall also comply with these requirements."
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.