Wiring 4 Way Switch Diagram. For complete instructions on wiring a basic 4 way switch see our wiring a 4 way switch article. Two wire cable is run from the light to sw1 and 3 wire cable runs between the three switches.
I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects. Keep in mind that each light switch will count as two wires when calculating your box fill. A 3 wire nm connects the traveler terminals of the first 3 way switch and the first 4 way switch.
Keep in mind that each light switch will count as two wires when calculating your box fill.
Basic 4 way switch wiring diagram. Basic 4 way switch wiring diagram. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. This diagram is a thumbnail.
