A Class 1 circuit is that portion of the wiring system between the load side of the overcurrent device (or power-limited supply) and the connected equipment [100]. Article 725 of the National ...
Article 725 of the National Electrical Code (NEC) provides the requirements for “Class 1, Class 2, and Class 3 remote-control, signaling, and power-limited circuits.” The title of Art. 725 includes ...
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Understanding Electrical Wire Color Codes

First on the electrical wire color code is black. “Black wires are most used as ‘hot’ wires in residential systems,” says ...