Since the power comes from the light, you will need to transfer this power to the second switch.
Connect the ground wire from the new cable and the power cable from the light with a wirenut.
A three-way switch allows you to turn a light on or off from two different switches.
Connect the ground wire from the power source, the ground wire to the light, and the ground wire from the new cable to the ground terminal on the first switch.
Also, if you don't have a voltage detector, buy one so you can check for live wires and avoid hazardous shocks.
How do u wire a three way light switch
The wiring method will depend on whether your power goes to the switch first or the light first.
You find the breaker box, locate the breaker that controls the lights for the room you are working on.
If the circuit breaker is 20 amps rather than 15 or the existing wire is 12 gauge, use size 12-3 cable.
Off power at the main circuit breaker panel before unhooking the existing switch, then check the wires with a voltage detector to verify that the power is off.
The second electrical box to the wall and wire a three-way switch, following figure b.
How do you wire up a three way light switch
If the tester shows current, check the service panel and turn off another circuit that powers the switch.
(you may have to pry the box away from the stud slightly to create space for the blade.
Wire screw - this is located on the left side of the switch, and is a different color than the two traveler terminals.
Other switches, you won't see on and off markings on the toggle, since either switch can control the light.
It covers running new electrical cable and connecting both switches, and replacing undersized electrical boxes.
Connect the white wire on both ends of the new cable to the left traveler terminals on each switch.
An existing two-way switch to a three-way switch and run new wire to the second switch location.
You must use this type of cable to ensure correct voltage and the number of wires.
Controlling a light from two switches is a bit more complicated than first meets the eye, especially if you're dealing with finished walls.
Connect the ground wire from the new cable to the ground terminal on the second switch.
You'll need two of them, one to replace the existing switch and another for the new switch location.
With these, you'll have the convenience of turning a light on and off from two spots.
Three-way switch allows you to turn a light on or off from two different switches.
Connect the wires to screw terminals by slipping the looped wire under the head of the screw.
Categories home and garden home improvements and repairs electrical maintenance electrical wiring and safety switches.
Replacing any 3-way switches that are broken, turn off the power at the breaker box.
Wire terminals - these are located on each side of the switch towards the top of the switch.
This article, we'll show you how to run a new electrical cable and connect the two switches.
You will likely need larger boxes than you already have if you are replacing a regular single-pole switch.
Off power to the existing switch, unscrew it from the electrical box and pull the switch out of the box.
And unhook any wire connections that are inside the existing box (wires that weren't connected to the switch).
Three-way switches are useful for large rooms with multiple entrances, but require a bit more wiring than a standard,.
This Home Depot guide provides information on how to install a 3-way switch in your home.
The two wires you unhook from the old switch and the three wires you'll add from the new 14-3 cable are the only wires you need to work with.
Three-way switches are useful for large rooms with multiple entrances, but require a bit more wiring than a standard, single-pole switch.