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Old 01-11-2012, 11:28 AM   #1
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replacing an existing 1-way decora light switch with a dimmer switch


Looking for some help on how to wire a dimmer switch. It's single-pole one way and is housed in a 2-gang box on the same circuit with another single-pole one way switch.

The dimmer has 3 wires - 2 black wires and one green (the ground).

The existing switch that I want to replace has 2 black wires connected to it but no ground. I can see that all the white wires for both switches are marretted together in the back of the box.

So if I remove the existing switch I will have 2 black wires that I need to connect and marrett to the 2 black wires on the dimmer. Does it matter which one gets connected? I can see no identifying info on the sheathing of any of the 4 wires in question.

Secondly, what can I do with the ground wire? Do I have to attach it to the box or can I just clip it off?

Thanks

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Old 01-11-2012, 11:32 AM   #2
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replacing an existing 1-way decora light switch with a dimmer switch


The black wires from the dimmer go to the black wires that were on the existing switch. It doesn't matter which wire connects to which. Are there any ground wires in the box? Is the box metal or plastic?

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Old 01-11-2012, 11:42 AM   #3
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replacing an existing 1-way decora light switch with a dimmer switch


McSteve:
Thanks for the reply. The box is metal and there are ground wires connected to the box already.
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Old 01-11-2012, 11:49 AM   #4
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replacing an existing 1-way decora light switch with a dimmer switch


Alrighty, the ground wire for the dimmer should be connected to the other ground wires in the box.

Theoretically, all the incoming ground wires, a ground wire from each switch, and a ground wire attached to the box should all be connected together. If this isn't the case, you might want to try to correct it while you're in there.
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