Favorite Light Switch Black Wire

The connected wire feeds the other loads and the disconnected wire is the light feed.

Light switch black wire. The switch simply interrupts the current so it doesn t matter to which. This is the wire that provides the 120 volts of power to your switch from the power company. The source hot wire is connected to a switch terminal and the other terminal is connected to the black cable wire.

Notice the black wire is the only wire that we are controlling through the 2 way switch. Wiring a one way switch. If the light doesn t turn on then it s the other way around.

The other terminal is marked as l1 and is the output to the light fixture. If the switch that was there is a standard light switch with two brass screws on it and one green screw you can connect the red wire to either of the brass screws. If you have a ground wire connect the ground wire to the green screw.

The light will either turn on or it won t. At the light the white wire connects to the neutral terminal and the black wire connects to the hot. The common is for the live wire that supplies the input voltage to the switch.

Here a single pole switch controls the power to a light fixture. It is usually a black wire. The neutral wire from the source is spliced to the white cable wire and continues on to the light.

Connect the black wires to the switch terminals. Connect either of the other two black wires to the other screw on the switch. Connect the black wire to the other brass screw.