Normally youll see a red wire in places you would expect a ceiling fan. When you see a red wire in a light switch box it can mean two things.
Switch With 2 Black 2 White 2 Ground And 1 Red Wire
Red wire light switch. Turn on your power and test the switches. The exact purpose of a red wire for a light fixture can vary. But in places like a bathroom or a wall light if you see a red wire its a good bet that the red wire is the wire thats connected to the light switch. Except in rare cases it is a hot wire or a switched hot wire. Attach the red wire from the light fixture to the nut at the top left of the switch. Push both switches into their boxes and secure them with screws at top and bottom.
In my friends case the solution was simple if not intuitive. Or it could be the red wire is the wire going to the fixture and the black wires are the live wires. So the red wire is probably the one you want. Connect the bare copper wire to the green nut at the bottom left of the switch. Well cover the easier scenario first. The wall switch typically when a ceiling fan is installed the red wire is most commonly used for the light and the black is commonly for the fan motor.
It could be there is or once was a three way switch in play. The red wire as a spare wire when a ceiling fan is not installed this spare red wire is insulated with electrical tape or capped off with a wire nut. Check the wire with a non contact voltage tester with the power and. Red wire on the light fixture step 1 turn off the power to the light circuit then check the wires with a voltage tester to verify there is no voltage reading.
Gallery of Red Wire Light Switch
