It only takes a minute to sign up. I'm replacing yet again my bathroom dimmer switch. The old switch had 3 wires: 2 black and one green. The two black wires were attached to the wires coming out of the wall and the green wire was attached to nothing. Can I attach the new switch somehow?
How to install a smart light switch
How to Install a Dimmer Switch | how-tos | DIY
The simple answer for a typical two-way dimmer switch is black on the dimmer goes to the black wire in the wall, the other black on the dimmer goes to the white wire in the wall and the green wire on the dimmer goes to the bare copper wire in the wall. A two-way dimmer switch has three wires coming out of the back. Usually, two wires will be black and one will be green. However, it might have one red, one white and one green or one black, one white and one green. When installing your dimmer, remember electricity flows into it on one side and out on the other side. If your dimmer has two black wires, the orientation doesn't matter. If there are different color combinations, attach red or black to the black wire in the wall or whichever wire is hot has power.
How to Install a Single-Pole Dimmer Light Switch
A dimmer switch is a light switch that regulates the flow of electricity to a light through use of a dial, slider, or some other control that operates internal circuitry. While older-style dimmers used a mechanical resister dimmed lights by dissipating excess current through heat, modern dimmers are electronic devices that actually interrupt the current many times each second to limit current flow to the lights The switch can turn the light on, shut it off, or set the illumination for any range of brightness in between. For most do-it-yourselfers, it is a fairly simple task to install a single-pole dimmer switch, which controls a light fixture from a single wall switch. There are also three-way dimmers, designed when you want to control lighting from two switch locations.
How to install a Dimmer switch. Wiring a Dimmer switch is as simple as Wiring a 2-way switch. If you're just replacing an already existing 2-way switch, then your objective should be as easy as swapping the wires from one switch to the other.