Schematic 2 Way Light Switch Wiring. At the load switch box the black wire of the two wire load cable gets connected to the copper or black terminal on the three way switch. 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.
When wiring a 2 way switch circuit all you re really doing is controlling the power flow switching off on to the load a light lamp outlet ceiling fan etc now a typical circuit will contain a 3 wire cable known as romex. For simplicity the earth wire is not shown in the above diagram. If you need to know how to wire a two way switch then this is the place to start.
The cable consist of a black wire a white wire and a bare copper wire.
Light switch wiring diagram shows electrical power entering the ceiling light electrical box and then continues to a wall switch using a 3 conductor cable. Two way switching 3 wire control new cable colours here we a have a schematic fig 1 which makes it easy to visualise how this circuit works. Your lighting circuit must have an earth cable terminating in the switch back box and also at the switch plate if it is metal. If you need to know how to wire a two way switch then this is the place to start.
