How to Install a Dimmer Switch

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How to Install a Dimmer Switch

Build.com

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Step 1 of 11

Since you're working with electricity, cut the power at the junction box.

Step 2 of 11

Remove the switch plate.

Step 3 of 11

Unscrew the old light switch.

Step 4 of 11

Cut both black wires that are attached to the old switch.

Step 5 of 11

With the wire cutters, strip the black wires about a half-inch down.

Step 6 of 11

Connect the copper wire from the wall's junction box with the green wire in the new dimmer switch. Connect the existing black wires from the junction box with the black wires in the dimmer switch.

Step 7 of 11

Top these connections off with wire caps.

Step 8 of 11

Place the wires back in the junction box.

Step 9 of 11

Install the new dimmer switch.

Step 10 of 11

Attach the new switch plate.

Step 11 of 11

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You're Done

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Build.com

Chico, CA

bld.cm/XMe66U

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Phillips screwdriver

Wire cutter

Its also important to note that not all lighting fixtures are "dimmer" friendly.

Erwin Palomar 5 months ago

Oh, the switch is a supply, screws, wire caps. I'm guessing that may be all, but I wouldn't know having never done this before. But seeing all of those things in the supply list, even if they seem like no-brainers to some, would be helpful to someone like me. I just feel more comfortable and confident taking on a project if EVERYTHING is outlined very clearly.

Alexandra Mott 5 months ago

Hi Alexandra. This project is quite simple and doesn’t require too many supplies. What other supplies were you thinking?

Build.com (author) 5 months ago

Thank you for your comment, Michael. In addition to the previous comment, since older homes don’t have ground wires, you’d just need to cap off the green wire.

Build.com (author) 5 months ago

If there are two switches, then install 2 dimmers. You could tie 2 switches into one but would risk running too much wattage through the switch and burn it out. Most switches are rated at 300-600 watts. Also, if you go down to 1 switch you'll have an empty light switch space to cover up.

Brent Holland 5 months ago

This is not a complete guide. What happens if there are two switches? Also, what happens in an older house?

Michael Zucker 5 months ago

It seems like a handy guide but I think I might find it an easier, more comprehensive guide to follow if it featured a more complete supplies list!

Alexandra Mott 6 months ago

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I think it's important to note here that the green/copper wire is the ground, older homes may not have a ground wire and it this case you just cap off the green wire on the dimmer switch.

Brent Holland 5 months ago

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