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 ...

All questions and answers are based on the 2017 NEC. Underlined text indicates a Code change. Q. What are the NEC requirements for supporting and securing metal-clad (Type MC) cable? A. Type MC cable ...