Three Way Wiring Diagram. Black live or hot wire green ground wire white neutral or common wire red terminal wire two 3 way switches. This might seem intimidating but it does not have to be.
A very common type of 3 way electrical diagram is when the power supply wire moves from one switch to the second switch and finally terminates at the fixture. Three way switching schematic wiring diagram. Three wire cable runs between the switches and 2 wire cable runs to the light.
A 3 wire nm connects the traveler terminals of the first and second 3 way switch together.
All three switches are connected together by a three core and earth control cable. Just draw the cables from the distribution board db or junction box connect the black wire to the dimmer or switch and then to the bulb. A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. And this is what you will need for 3 way switch wiring.