Way Switch Wiring Diagram. A two way switchuk schematic diagram of old wire colours. And this is what you will need for 3 way switch wiring.
Each pair of traveler terminals should be wired to the traveler wires from one of the 3 way switches in the circuit. 4 way dimmer switch wiring diagram. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box.
Take a closer look at a 3 way switch wiring diagram.
The way i show allows you to fairly easily add a second two way switch to an existing light switch by simply wiring them together in a certain way. And this is what you will need for 3 way switch wiring. 4 way switch wiring diagrams this 4 way switch diagram 1 shows the power source starting at the left 3 way switch. If you need multiple lights attached to this system just connect them together white wire to white wire and black to black.