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

Thank you for visiting one of our most popular classic articles. If you’d like to see updated information on this topic, please check out this recently published article, Requirements for the ...

This answer is based on the 2017 NEC. A. Exposed Type NM cable must closely follow the surface of the building [Sec. 334.15(A)]. Nonmetallic-sheathed cable must be protected from physical damage by ...