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 ...

Q. Are the electrical wires in a home color-coded for positive, negative and ground? Our wires are brown, blue, and green/yellow. Which ones should we connect to which screws? A. Residential wiring is ...