Wiring A Light Switch With 3 Sets Of Wires

A switch interrupts the hot leg of the circuit so it has terminals only for black wires and ground.

Wiring a light switch with 3 sets of wires. The black hot wire connects to the far right switch s common terminal. Twist the two copper wires in the first box together and attach them to the ground nut on the switch. Later in the evening i noticed the router turned off so i tested the voltage at the outlet and got some voltage but way less than 120. When you re wiring decorative light switches such as chrome or stainless steel etc you ll find that the switch will also have an l2 terminal which means it s a two way switch.

I was changing an old ceiling light fixture with a new one. The terminals are brass. In this diagram power enters the fixture box. Turned off the breaker and discovered 3 sets of wires going to the outlet.

This 3 way light switch wiring diagram shows how to do the light switch wiring and the light when the power is coming to the light fixture. The other terminal is marked as l1 and is the output to the light fixture. While the light works it won t switch off at the switch only at the breaker. To wire a 3 way light switch you ll need 2 3 way light switches 2 2 wire non metallic cables 1 3 wire non metallic cable and 2 6 inch grounding wires.

I took out a light fixture in the basement with the intent of installing a new one which ive done before and i come across 3 sets of wires 3 black 3 white and 3 ground wires i didn t take a pic or mental note of how it was wired to the old fixture and now i m confused. 3 way switch wire diagram power to light fixture. First run a 2 wire cable from the wall power to the black screw on 1 of the switches. Removing the old fixture i discovered 3 black wire 3 white wires and a ground.

You connect the black wire from the power source to one of these brass terminals the line terminal and the black wire going to the light fixture to the other which is the load terminal. Because the electrical code as of the 2011 nec update requires a neutral wire in most new switch boxes a 3 wire cable runs between the light and switch. 2 whites and 1 black backstabbed into the outlet and the other white and 2 blacks tied together with a wire nut. The red and black are used for hot and the white neutral wire at the switch box allows for powering a timer remote control or other programmable switch.

Every time i turn the switch on the breaker trips. This is an updated version of the first arrangement. The common is for the live wire that supplies the input voltage to the switch.