The annexes relate to referenced standards, examples, and calculations. These tables regard conduit, conductor, and cable properties, among other things. This chapter covers additional requirements for these systems, which include radio, TV, and telephones/cellphones.
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Special conditions involve the installation and use of alarms, emergency systems, security systems, card access control systems, and closed circuit TV (CCTV). Electrical equipment that falls under this category includes signs, machinery, transformers, distribution boards, switchboards, and circuit breakers.
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Examples include temporary installations, boat yards, marinas, mobile homes, and agricultural buildings.
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These buildings concern unique environments that pose a high risk to multiple people. General-purpose electrical equipment includes heaters, switches, receptacles, and cords. This includes cables, conductors, wiring devices, and others. Chapter 3: Wiring Methods and Materials.There are many ways to cover and protect wires, such as using industrial cable protectors and wire coverings that prevent damage from heat, moisture, and dust. This covers the general definitions and rules for electrical installations (markings, connections, voltages, etc.).
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Its introduction establishes the general purpose, information, and scope of the Code. The NEC is comprised of an introduction and nine chapters, as well as annexes and an index. Any revisions to the NEC typically involve the addition of new articles, which address evolving technology and establish new corresponding codes.
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These articles provide an explanation and other information for the specific code number. For example, the article on code 710, Stand-Alone Systems, is located in the seventh chapter of the NEC. However, it is broken down into chapters, and each code article’s number corresponds with the chapter it is based in. The NEC can be dense the 2014 edition was about 1,000 pages long. What’s Included in the National Electrical Code? When it comes to something as important and potentially hazardous as the use of electricity, it’s a good thing to have licensed professionals all on the same page. Knowledge of the NEC is an integral part to the electrical industry, and is currently the most definitive-and universally adopted-set of guidelines for electrical installation that protects the safety of people and property. People who pursue becoming a licensed electrician will learn the Code as part of their classroom education and as part of their on-site apprenticeship. There are a total of 54 editions of the Code, and while the 2017 NEC edition is the most current, a new 2020 edition is upcoming.Įvery electrician must be familiar with the standards set forth by the NEC and be capable of putting them into practice.
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The National Fire Protection Association (NFPA) has conducted administration over the National Electrical Code since 1911 the Code is currently an aspect to the NFPA’s National Fire Code Series as an important proponent for self-regulation and safety.
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The Code has been published since 1897 with new revisions released once every three years it is consistently reviewed and updated, with input from active electrical professionals, to incorporate constant changes in safety and technology.