Pick the diagram that is most like the scenario you are in and see if you can wire your switch. 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.
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3 way light switch wiring diagram uk. Three way switching schematic wiring diagram the circuit consists of a two way switch at each end top and bottom switches in fig 2 and an intermediate switch in the middle. Wiring diagram 3 way switch with light at the end in this diagram the electrical source is at the first switch and the light is located at the end of the circuit. The black and red wires between sw1 and sw2 are connected to the traveler terminals. This 3 way light switch diagram shows connections when the power comes into the first switch on to the second switch and then on to two or more lights switched by the 3 way circuit. This cable consists of three cores brown grey and black which are all line colours and an earth wire. Three wire cable runs between the switches and 2 wire cable runs to the light.
This might seem intimidating but it does not have to be. Take a closer look at a 3 way switch wiring diagram. Connect the line brown wire coming from the light together with the 3 coreearth cable black wire in to the l1 terminal of the two way switch. Interested in a 4 way switch wiring diagram. All three switches are connected together by a three core and earth control cable. 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.
Wiring a three way switch happens with the use of the 3 coreearth cable. With these diagrams below it will take the guess work out of wiring.