The switch just connects the two wires together when it is on. The cable going to the light switch is connected as follows fig 2.
Standard Single Pole Light Switch Wiring Hometips
Wiring diagram of one way switch. If in any doubt on how to proceed consult a qualified electrician. Incorrect installation will invalidate your guarantee. One way lighting circuit using in line switching. A one way light switch is quite easy to wire up. For a 4 way light circuit to work you need two 3 way switches and at least one 4 way switch. As described on the other pages the two switch wires are both live.
In the ceiling light fixture electrical box one black wire from a 3 way switch gets connected to the black load wire on the light fixture. Wiring diagram 3 way switch with light at the end. Read the instructions carefully before commencing installation. One way light switch wiring diagram one way ceiling switch wiring diagram. In the above 3 way switch wiring diagram at each switch the black wire gets connected to the copper or black screw. Three wire cable runs between the switches and 2 wire cable runs to the light.
Two way switch can be operated from any of the switch independently means whatever be the position of other switchonoff you can control the light with other switch. Danger as one of the switch wires will always be live always turn off the power at the consumer unit before replacing a light switch. The red wire from the feed cable is connected to the top terminal the red wire going to. 3 way switch wiring diagram depicting all wires in the ceiling junction box. With a pair of 3 way switches either switch can make or break the connection that completes the circuit to the light. All work carried out should comply with all applicable wiring regulations.
Line diagram of a one way lighting circuit using in line method fig 1.