Famous Light Switch 2 Red Wires 1 Black Ideas. Web why does my light switch have 2 black wires and 1 red wire? One of the black wires is probably the line and the other carries power to some other device on the circuit;
Then, the second hot wire will connect to the top terminal screw. Web i’m trying to install a ge aux switch and when i opened up my existing switch, i see two red wires and a black wire. Cap it with a wirenut or use.
