Simple 4 Way Switch Diagram. This diagram is a thumbnail. The schematic diagram below shows how all four way switches are wired.
In some countries the four way is called an intermediate switch. The 4 way terminals are labeled in and out two of each. Four way switch wiring schematic.
The wiring diagram further down depicts another choice of wiring method.
In the diagrams below the first switch 3 way common terminal connects to line voltage. The other pair of the second switch 4 way travelers connect to one pair of the third switch 4 way travelers. In the diagrams below the first switch 3 way common terminal connects to line voltage. The switch can be used to control the electricity supplying lights from three locations.
