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National Electrical Code

Chapter 8 of the NEC

Jan. 5, 2021

Requirements pertaining to communications systems

Chapter 8 of the National Electrical Code (NEC) includes half a dozen articles pertaining to communications systems, such as radio and television equipment [810], network powered broadband [830], and premises powered broadband [840]. Article 800 contains general requirements for five types of systems. Some highlights include:

Mechanical execution of work [800]. This includes the often-repeated (in the NEC) “neat and workmanlike manner” plus specifics that apply to communications systems. You will also find a General Requirements section in each of the other five Chapter 8 Articles. In those cases, General Requirements provides scope and definitions plus installation requirements specific to the equipment covered by that article.
Different requirements apply to cables entering buildings, cables within buildings, and cables underground.
Clearances exist, mainly to keep these signal voltage conductors and equipment away from power conductors and equipment.
Tables throughout Chapter 8 detail which cable types can be used in a given application and other important information. Article 840 is the only one without tables.
Communication system grounding must be bonded to the main power bonding to prevent flashover and shock hazard.

About the Author

Mark Lamendola

Mark is an expert in maintenance management, having racked up an impressive track record during his time working in the field. He also has extensive knowledge of, and practical expertise with, the National Electrical Code (NEC). Through his consulting business, he provides articles and training materials on electrical topics, specializing in making difficult subjects easy to understand and focusing on the practical aspects of electrical work.

Prior to starting his own business, Mark served as the Technical Editor on EC&M for six years, worked three years in nuclear maintenance, six years as a contract project engineer/project manager, three years as a systems engineer, and three years in plant maintenance management.

Mark earned an AAS degree from Rock Valley College, a BSEET from Columbia Pacific University, and an MBA from Lake Erie College. He’s also completed several related certifications over the years and even was formerly licensed as a Master Electrician. He is a Senior Member of the IEEE and past Chairman of the Kansas City Chapters of both the IEEE and the IEEE Computer Society. Mark also served as the program director for, a board member of, and webmaster of, the Midwest Chapter of the 7x24 Exchange. He has also held memberships with the following organizations: NETA, NFPA, International Association of Webmasters, and Institute of Certified Professional Managers.