Impressive 3 Red Wires In Light Switch

Turn off the power at the breaker or fuse box.

3 red wires in light switch. The light is controlled by 3 switches based on the information provided by my wife which i believe is correct that must be what the other wires are for. The old switch was attached with two blacks inserted into the back of the switch. Or it could be the red wire is the wire going to the fixture and the black wires are the live wires.

We ll cover the easier scenario first. Never work on a light switch with the power on. Hi all i am replacing my single pole light switch and noticed when i removed the old switch that there are three black wires coming from the box.

Of the three black wires only one of them is hot. A set of hallway lamps with switches on each end of the corridor the red wire is often a feed between the switches. If you have a fixture s controlled by two or more switches ex.

For a three way circuit. Just like any loop in loop out radial circuit the switch cable from the ceiling rose contains two wires a permanent live and a switched live. When you see a red wire in a light switch box it can mean two things.

Cable d fig 2 is a three core and earth this is the 3 wire control that links the two light switches together. And if you don t know which breaker controls the light you. This is cable c below one wire connects to l1 and the other to l2 on the top switch.

One other common use of the red wire. But first let s get my disclaimer out of the way. Single pole switch with 3 black wires.