A four way switch is added when there are more than two switch locations operating the same light.

Four way switch wiring.

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. Then connect the black wire coming from the fixture to the black wire going to the first 3 way switch. Two wire cable is run from the light to sw1 and 3 wire cable runs between the three switches. How to wire a 4 way switch. You would just continue from one 3 way switch box with the 14 3 three conductor cable two colored traveler wires a white neutral and a bare or green ground wire in and out of each four way switch box. This diagram illustrates wiring for a 4 way circuit with the electrical source at the light fixture and the switches coming after.

Next connect the white wire coming into the box to the white wire on the fixture. Conventional 4 way switch wiring. In some countries the four way is called an intermediate switch. I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects. The source neutral wire is connected directly to the light fixture and the hot is spliced to the white cable wire running to sw1. Power from light fixture to light switch.

To wire a 4 way switch start by turning off the circuit breaker for the room you re working in. Do you need a 3 way switch wiring diagram. After that connect the black wire from the fixture to a red or white wire leading out of the box to the first 3 way switch. 4 way switches have four terminals each with two pairs of travelers one set usually black and one set usually brass color. A four switch configuration will have two 3 way switches one on each end and two 4 way switches in the middle. Four way switch wiring schematic.

At sw1 it s spliced to the white wire running to the 4 way switch box where it s spliced to the white. Wiring a 4 way switch is simply adding a switch to an already existing 3 way switch circuit. First of all we need to go over a little basic terminology on switches. This allows you to control a load from other locations in addition to the 2 locations that a 3 way circuit provides. The red and black wires are connected to the four way. When you re done with all the wiring wrap any exposed wires with.

The black line wire connects to the common terminal of the first 3 way switch. How to wire 4 way light switch and intermediate switch in this video we explain how four way intermediate switching works to connect a light fitting which i. 4 way switch wiring with light first. A 4 way switch wiring diagram is the clearest and easiest way to wire that pesky 4 way switch. A 3 wire nm connects the traveler terminals of the first 3 way switch and the first 4 way switch.