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 ...

I'm preparing to run CAT5e through my crawlspace and through some walls. I'd like to do it to code if I can. I'd like to know what is required before I buy materials (to figure out if I need plenum ...