All questions and answers are based on the 2017 NEC. Underlined text indicates a Code change. Q. What is the NEC requirement on grouping circuit conductors together? A. Conductors of the same circuit ...

How do you identify ungrounded conductors in branch circuits supplied by DC systems? The 2014 NEC added nearly half a page of text to address this question [210.5(2)]. The requirements apply to DC ...

Wire color codes play a vital role in ensuring safe and correct electrical connections. They help distinguish between hot, neutral, and ground wires, which are identified by colors like black, red, ...

First on the electrical wire color code is black. “Black wires are most used as ‘hot’ wires in residential systems,” says master electrician Allyson Saling with Frontdoor home services app. “Hot or ...