With a standard 2 way dimmer a single switch controls a single light.
2 way switch wiring with dimmer.
In the diagram below a 2 wire nm cable supplies power from the panel to the dimmer box the black line wire connects to the common terminal of the 3 way dimmer a 3 wire nm connects the travelers of the dimmer to the travelers of the 3 way switch traveler wires are interchangeable on each switch.
Two dimmers may be installed to control one or more lights as long as the dimmer switches are compatible with each other such as one being the master and the other being the slave.
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Connect the ground wire from your dimmer to a green or bare copper wire in the wall box.
This means that it is the only control for the light.
A standard single pole dimmers 2 way or three way dimmers.
With a three way dimmer you can control a light from 2 different locations.
But if you re replacing a three way switch with a three way dimmer label the common wire it ll be labeled on the old switch when you remove the old switch so you can connect it to the common terminal on the dimmer.
Next set up the three way dimmer switch wiring.
For this you ll need one three way dimmer and one three way switch.
Remove 3 4 inch of casing from the end of the house wires and the dimmer switch wires if needed.
Here are the steps for wiring a three way dimmer switch.
Some switches are called two way switches.
If you don t have this circuit you ll need to rewire with the standard red white black and green or brown.
In some systems the green wire might be copper or brown.
If the house wires are bent use a wire stripper to cut off the twisted ends.
Identify the light circuit turn it off and tag it with a note before working with the dimmer switch wiring.
3 way switch wiring diagrams do it yourself help throughout 2 way dimmer switch wiring diagram image size 502 x 330 px and to view image details please click the image.
Technically two way switches are called three way switches.
It doesn t matter if you reverse the two switch wires to a single pole dimmer.
You ll notice four colored wires.
Red white black and green.
Dimmers come in two basic wiring configurations.