Perfect Dimmer Switch Two Black Wires

Mike master electrician replied 10 years ago.

Dimmer switch two black wires. Traveler wires are interchangeable on each switch. 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. The easiest and safest way is to use a multimeter to test for current.

Two blacks and a green ground wire. A two way dimmer switch has three wires coming out of the back. Two black wires and one red wire.

It s essential that you determine which black wire is hot before proceeding. In the diagram below a 2 wire nm cable supplies power from the panel to the dimmer box. Black means hot white signifies neutral and green indicates ground.

Turn off power and connect the corresponding wires from the junction box with the insteon wall switch an cap them with wire nuts. I have a ge dimmer switch that went bad. I bought a new dimmer switch it has 2 black wires and 1 green wire and the wall box has one white and one black wire.

The old one had three wires coming out of the back of the switch. However if you need to rewire a light switch or a plug socket you may occasionally come across two black wires. The red tests at 120 v 20v for one black and answered by a verified electrician.

The black line wire connects to the common terminal of the 3 way dimmer. Mike master electrician. Which wire goes with what.