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 ...

A. The requirements of Sec. 300.22 apply to the installation and uses of electrical wiring and equipment in plenum spaces for environmental air. (C) Plenum Spaces for ...

All questions and answers are based on the 2017 NEC. Underlined text indicates a Code change. Q. What are the Code rules regarding wiring installed in ducts specifically fabricated for environmental ...