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Introduction to the NEC

Definitions

Where Terms are Defined

Article 100 defines terms that have a special meaning in the NEC (that have "definitions essential to the proper application of this Code") and are used in more than one Article, such as the term branch circuit.

A modification of this general statement is Section 500.2 where terms are defined for the purposes of Articles 500 through 504 and 510 through 516.

Terms that are used in only one Article are defined in that Article. For example, fire alarm circuit is used and defined only in Article 760.  Specific Articles may use and include terms extracted from related codes and standards, but they are defined in those Articles.

The NEC does not define terms that are used in the Code in the same way they are in general usage. Nor does it define commonly defined technical terms, such as voltage or current, which are part of the basic terminology used with an electrical system or technical terms that are defined in related codes and standards.

NOTE: This is an unformatted excerpt from our online fire protection training library.

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