Lutron Maestro dimmer wiring question

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Old 08-10-09, 04:01 PM
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Lutron Maestro dimmer wiring question

I just purchased two Lutron Maestro single pole dimmers to replace old light switches. They work perfectly, except im not sure if its grounded to anything. The old switches had no ground wire, so maybe the ground was built into the hot or neutral wires? Heres few pictures to help. Thanks in advance!





 
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Old 08-10-09, 04:08 PM
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The bare copper colored wires in the box are your grounding wires. Connect the greens to them making sure that the contact area between the wires is clean of the paint or popcorn spray finish.

Grounds are never built in to the hot or neutral wires.
 
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Old 08-10-09, 07:08 PM
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So according to the picture, would it be the set of wires with the twistcap in the back of the box? Sorry for all of the dumb questions, Im a complete noob when it comes to anything electrical. Thanks pcboss!
 
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Old 08-10-09, 07:31 PM
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Possibly, I can't see enough detail to tell. You are looking for a group of bare copper colored wires to connect the green grounding tails to. If that is what is in the twist cap, remove the cap and add the 2 grounding tails and replace the cap.
 
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Old 08-10-09, 07:44 PM
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Well they are both groups of bare copper colored wires. The only real difference I can spot between the two is that the group of wires on top are coming in from a outside of the box, whereas the group of wires on the bottom are connected to each other within the box, such as the hot or neutral wires are connected here. Hope this can help.




 
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Old 08-10-09, 07:54 PM
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Do not attach to either of those groups of wire that you removed the caps from.

You want the entire length of the conductor to be bare. Look at the back of the box. It looks like 3 are against the back. These should all be spliced together and to your new tails.
 
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Old 08-10-09, 08:00 PM
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Oh, okay. Now how exactly should I ground the wires to the three in the back?
 
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Old 08-10-09, 08:37 PM
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Correct. The ground wires have no insulation on them.
 
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Old 08-10-09, 09:19 PM
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Originally Posted by bovice View Post
Oh, okay. Now how exactly should I ground the wires to the three in the back?
All 3 would get twisted together similar to the ones that have caps on them already. There should be some method securing them together already. If it is a twist-on cap you could just add the 2 tails from the dimmers and replace the cap.
 
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Old 08-10-09, 11:48 PM
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ground crimp

you'll see the grounds in the back of the box, they have a copper crimp connector are are bare wires. remove the crimp and connect the green wires to the bare copper with a wire nut, pre twisting the ground wires and the 2 ground wires from the dimmer with a pair of pliers before you wire but them secure
 
 

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