Ecmweb 7824 Nec Logo 2013
Ecmweb 7824 Nec Logo 2013
Ecmweb 7824 Nec Logo 2013
Ecmweb 7824 Nec Logo 2013
Ecmweb 7824 Nec Logo 2013

Tip of the Week: The Basics of Chapter 4 in NFPA 70 (NEC)

Oct. 19, 2015
Chapter 4 covers general equipment, but there may be some overlap with special equipment covered in Chapter 6

The first four chapters of the NEC apply to all installations, except as modified by Chapters 5, 6, 7, and 8. The requirements for “equipment for general use” are in Chapter 4.

This equipment is in contrast to the “special equipment” covered in Chapter 6. The difference can seem somewhat arbitrary. It makes sense that motors, so ubiquitous, would be considered ”for general use” [430]. But why is fixed outdoor electric de-icing and space-heating equipment covered in Chapter 4 [426] while elevators, which have a much wider range of application (at least geographically) are covered in Chapter 6 [620]?

The best solution to this question is to simply realize that equipment is covered in either Chapter 4 or Chapter 6, with the former being dedicated to general use equipment and the latter to special use equipment, but there may be crossover. In other words, if you don’t find your equipment in one of these chapters, try the other.

Most types of equipment covered by Chapter 4 clearly belong there, without question. These include:

  • Flexible cords and cables
  • Fixture wires
  • Switches
  • Receptacles
  • Luminaires
  • Transformers
  • And, of course, motors
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.

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