I want to add a dimmer switch to one of the switch locations. This allows you to control a load from other locations in addition to the 2 locations that a 3 way circuit provides.
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How to wire a four way switch diagram. The 4 way is used when you want to control the light or lights from two or more locations. For circuits that control lights from two locations only check the wiring diagrams at this link. I have a four way switch set up like your diagram shows and it works great. How can i wire a 3way dimmer switch to one of the switch locations. To wire a 4 way switch start by turning off the circuit breaker for the room youre working in. Then connect the black wire coming from the fixture to the black wire going to the first 3 way switch.
How to wire a 4 way switch. First of all we need to go over a little basic terminology on switches. This diagram is a thumbnail. Wiring a 4 way switch with light at. Included are a 4 way dimmer switch diagram and an arrangement that can be used to control room lights from four different locations. To view it at full size click on the diagram.
A four switch configuration will have two 3 way switches one on each end and two 4 way switches in the middle. In the diagrams below the first switch 3 way common terminal connects to line voltage. The dimmer switch now acts like a master switch. Four way switch wiring instructions inside the switch packaging it is possible to bring all of the wiring into the ceiling light electrical box and wire your 3 ways and 4 ways from there. The first switch 3 way travelers brass color connect to one pair of the second switch 4 way travelers black or brass color. The white wire of the cable going to the switch is attached to the black line in the fixture box using a wirenut.
This 4 way switch diagram 1 shows the power source starting at the left 3 way switch. Check here for 4 way switch troubleshooting and help with 3 ways switches here. A 4 way switch wiring diagram is the clearest and easiest way to wire that pesky 4 way switch. It can get crowded with so many wires in the ceiling box so you must use a larger size electrical box to be code compliant. Next connect the white wire coming into the box to the white wire on the fixture. Wiring a 4 way switch is simply adding a switch to an already existing 3 way switch circuit.
I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects. Click here to access note. This 4 way switch diagram 2 shows the power source starting at the fixture. For complete instructions on wiring a basic 4 way switch see our wiring a 4 way switch article. I replaced one of the three way switches with a 3 way dimmer switch.