First run a 2 wire cable from the wall power to the black screw on 1 of the switches. The white neutral from the source is connected directly to the light fixture.
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3 switch light switch wiring. The black and red wires between sw1 and sw2 are connected to the traveler terminals. When wiring a 3 way switch first screw the terminal screws of the new switch until they are difficult to turn. Im moving a light switch to a different wall and have found that the cable from the switch to the light has 3 wires but i dont know why. To wire a 3 way light switch youll need 2 3 way light switches 2 2 wire non metallic cables 1 3 wire non metallic cable and 2 6 inch grounding wires. Connect the two remaining traveler wires to the two brass or light colored screws. Connect the wire marked common to the black or dark colored screw.
The 2 wire source feeds to an adjacent switch for a differ. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light. Either way complete these five steps for 3 way light switch wiring. Wiring a 3 way light switch is certainly more complicated than that of the more common single pole switch but you can figure it out if you follow our 3 way switch wiring diagram. There are a number of configurations that can be used for wiring a 3 way switch. Re wiring 3 way light switch hi guyscould really do with some advice for replacing a 3 way single light switch.
Source 1 comes in at the light fixture and a 3 wire cable is run from there to the switch half on the device. Connect the red and black wires from switch 2 to the remaining terminals. The old switch had four wires going into l1 l2 l3 and l4. Its likely youll also need to replace the existing switch box with a larger one to accommodate the extra wires for the 3 way switch. Connect the ground wire to the green screw. The hot from the source is spliced to the black wire running to the combo and to the input side of the switch.
Turn off the correct circuit at your electrical panel. Connect the wiring at switch 1 attaching the black wire from the power source to the switchs labeled common terminal. Add an electrical box for the second three way switch in the basement. Wiring diagram 3 way switch with light at the end. However it can be done with a little patience and attention to detail. Installing a 3 way light switch is a much more involved process than installing a single pole light switch.
Three wire cable runs between the switches and 2 wire cable runs to the light. Connect the remaining white wires and ground the switch to the switch box. In this diagram the electrical source is at the first switch and the light is located at the end of the circuit.
Gallery of 3 Switch Light Switch Wiring
