Three Way Light Switch Diagram. Line voltage enters the light fixture outlet box. Making them at the proper place is a little more difficult, but still within the capabilities of most homeowners, if someone shows them how.
Note that these diagrams assume that you're following all recommended practices for safe installation of electrical circuits. The white wire of the cable wiring is. Three-way switches allow for controlling a light fixture from two separate locations, these are usually used at the top and bottom of a flight of stairs or at two different entrances to a room.
This is to benefit guests (so they don't hurt Some smart switches use wireless or power-line signaling.
Making them at the proper place is a little more difficult, but still within the capabilities of most homeowners, if someone shows them how.
You use two three-way switches to control the light, and wire it up as shown below: In this diagram, a normal piece of wire comes from the fuse panel to the Three-way wire(which includes red, black and white wires) runs from the switch on the left to the switch on the right, with the white wire carrying. Certain (most) switches are required, and required switches must turn on a light and give usable light. They are always installed in pairs and use special wiring connections.