A 3 wire cable between the two switches and another 2 wire cable from switch 2 over to the light fitting. We have a 2 wire cable on the incoming power supply. Finally as the ceiling box is metal we will run a ground wire from the ground screw in the box and connect this to the ground wire connector in switch box 2. Then we run a ground wire from switch box 2 to the ground wire connector also. We connect the next ground wire between the wire connector of switch box 1 and a wire connector in switch box 2. To provide some safety we run a ground wire from the incoming supply and connect this into a wire connector in switch box 1.Then we run a ground wire from the ground terminal of switch 1 and connect this to the ground wire connector. Then we run the final white wire from the wire terminal of switch 2 over and through the ceiling box and to the light fitting which will complete the circuit. We then connect from this wire connector and run the white wire to a wire connector in switch box 2. Now for the incoming neutral, we run that into a wire connector which would sit within the switch box for switch 1. Then we run the black hot wire from the common terminal of switch 2 over into the ceiling box and into the light fitting.Then we take the red traveler wire and run that from the right traveler terminal of switch 1 over to the right traveler terminal of switch 2. We then run the black traveller wire from the left traveler terminal of switch 1 and over to the left traveler terminal of switch 2. See YouTube video for animation of working circuitįrom the incoming power supply, we take the black hot wire and connect this into the common terminal of switch 1.