How To 4 Way Switch Wiring Diagrams. Connect terminals 234 5 on the existing socket to terminals 234 5 on the new socket. In the diagrams below the first switch 3 way common terminal connects to line voltage.
Each pair of traveler terminals should be wired to the traveler wires from one of the 3 way switches in the circuit. In the diagram above splices are made and a three conductor cable is installed between all the switches. Place all the 4 way switches between the two 3 way switches.
The white wire needs to be re identified as a hot conductor because it is not being used as a neutral in this installation.
How to wire 4 way switch diagram. The white wire of the cable going to the switch is attached to the black line in the fixture box using a wirenut. I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects. If more than three switches are needed simply place more 4 way switches between the three way switches.