Article 300 is one of four Articles that form the basis for applying Chapter 3 wiring methods (the other three are Art. 310, Art. 312, and Art. 314). The requirements of Art. 300 apply to all Chapter 3 wiring methods. However, they don’t apply to the wiring methods for signaling and communications systems, except where there’s a specific reference in Chapter 7 or 8 to a rule in Art. 300. Prior to the 2014 NEC, the title of Art. 300 was “Wiring Methods.” But wiring ...

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