Light Switch Electrical Wiring Diagrams. This diagram illustrates wiring for one switch to control 2 or more lights. Circuit electrical wiring enters the switch box the black wire power in source attaches to one of the switch screw terminals.
L and n indicate the supply. When l1 is on l2 would be off. It includes instructions and diagrams for different varieties of wiring strategies as well as other items like lights windows and so on.
The 4 way switch has four terminals.
If you are based in the usa. Light after switches power at the switch. The source is at sw1 and 2 wire cable runs from there to the fixtures. Light switch wiring diagram multiple lights home electrical wiring light switch wiring electrical wiring.