4 Way Diagram. The black line wire connects to the common terminal of the first 3 way switch. Typical 4 way switch wiring nm cable in the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box.
This is the wiring for a dimmer in a 4 way circuit. The black line wire connects to the common terminal of the first 3 way switch. 4 way switch wiring diagram a 4 way switch wiring diagram is the clearest and easiest way to wire that pesky 4 way switch.
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Three wire cable runs between all the switches and 2 wire cable runs to the light. Three wire cable runs between all the switches and 2 wire cable runs to the light. A four switch configuration will have two 3 way switches one on each end and two 4 way switches in the middle. I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects.
