Connect the wire marked common to the black or dark colored screw. A three way switch is designed to work in tandem with another three way switch to allow you to control a fixture from two different locations.
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Understanding Three Way Wall Switches
Connecting a 3 way switch. Its likely youll also need to replace the. When wiring a 3 way switch circuit we will be using a 3 wire cable known as romex coming from the source such as the breaker box. Run a black wire from the new switch to the power source. Add an electrical box for the second 3 way switch in the basement. Regardless of what 3 way switch wiring diagram youre following youll need to use a 3 wire cable to connect the two 3 way light switches. So what you should see if you have correct 3 wire electrical cable romex is a black power white neutral and now a 3rd red wire.
Either way complete these five steps for 3 way light switch wiring. For this reason it doesnt have onoff markings because it can turn off the power when it is both up and down depending on the orientation of the other switch. While standard single pole switches have two screw terminals on one side of the switch plus a third green grounding screw terminal connected to the metal strap three way switches have three screw terminals plus a ground screw. Connect the ground wire to the green screw. Then a 4 wire cable going between the two 3 way switches and then a 3 wire cable going from the switches to the load. This might seem intimidating but it does not have to be.
Flip the switch on and electricity flows. With these diagrams below it will take the guess work out of wiring. Converting a single pole switch to a 3 way. 3 way switch wiring diagram. One of the screw terminals is a darker color than the other two terminals. Screw your two boxes and light fixture into place then gather your supplies.
Its likely youll also need to replace the. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. Connect the two remaining traveler wires to the two brass or light colored screws. Head to your fuse box and make sure there is no power coming to the room youre currently working in. The darker terminal is known as the common connection of the switch. Take a closer look at a 3 way switch wiring diagram.
Use the black wire in the top 2 wire conductor to attach the switch to the source. Turn off the correct circuit at your electrical panel. Dont attach the traveler wires to the common screw since. When wiring a 3 way switch first screw the terminal screws of the new switch until they are difficult to turn. Flip off power in the room youre working. Before you even start wiring you want to get the fixtures.
The screw is typically on the bottom of the switch.
Gallery of Connecting A 3 Way Switch
