Four Wire Switch Diagram. One is the source cable providing incoming power. Notice on the wiring diagram that of the 10 prongs spade connectors called termianls on the back four 4 make the rocker switch lights function while the remaining six are used for the electromechanical switching contacts.
How to wire a light switch. To wire a 4 way switch start by turning off the circuit breaker for the room youre working in. The source hot wire is connected to the common on sw1 and the neutral wire is spliced through directly to the light fixture neutral terminal.
When the switch is on the black wire is connected through the switch.
For a device controlled by a switch like a light fixture the switch breaks the black hot wire. Most people will instead bend the lug to contact the back of the pot and solder it into place. In this diagram power enters the fixture box. As a homeowner you will likely need to replace a light switch many times and paying an electrician is not optimal when you can do it in just a few minutes.