Unique Four Way Switch Wiring Diagram

Two wire cable is run from the light to sw1 and 3 wire cable runs between the three switches.

Four way switch wiring diagram. Attach the black and white blue traveler wires entering the 4 way switch box to the in terminals often the top terminals on the 4 way switch black on the left top pole and white blue on the right top pole. The source neutral wire is connected directly to the light fixture and the hot is spliced to the white cable wire running to sw1. Rear view of an old four way switch with copper screw terminals on one side and brass screw terminals on.

At sw1 it s spliced to the white wire running to the 4 way switch box where it s spliced to the white. That is to say that any time you find a 4 way switch there will also be two 3 way switches. The white wire of the cable going to the switch is attached to the black line in the fixture box using a wirenut.

The 4 way is used when you want to control the light or lights from two or more locations. Look at the markings on yours and read the instructions carefully. 4 way switch wiring with light first.

There are 4 places to terminate wire plus a green screw at the top of the. Power from light fixture to light switch. Keep in mind that each light switch will count as two wires when calculating your box fill.

This diagram is a thumbnail. Some 4 way switches may have the in and out pairs opposite each other rather than top and bottom. Basic 4 way switch wiring diagram.

Back side of 4 way switch. A 3 wire nm connects the traveler terminals of the first 3 way switch and the first 4 way switch. This diagram illustrates wiring for a 4 way circuit with the electrical source at the light fixture and the switches coming after.