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.

How To Connect A 2 Way Switch With Circuit Diagram
Wiring diagram of one way switch. Wiring diagram 3 way switch with light at the end. One way lighting circuit using in line switching. Line diagram of a one way lighting circuit using in line method fig 1. As described on the other pages the two switch wires are both live. Three wire cable runs between the switches and 2 wire cable runs to the light. In the above 3 way switch wiring diagram at each switch the black wire gets connected to the copper or black screw.
With a pair of 3 way switches either switch can make or break the connection that completes the circuit to the light. The red wire from the feed cable is connected to the top terminal the red wire going to. Read the instructions carefully before commencing installation. One way light switch wiring diagram one way ceiling switch wiring diagram. The cable going to the light switch is connected as follows fig 2. For a 4 way light circuit to work you need two 3 way switches and at least one 4 way switch.
The switch just connects the two wires together when it is on. If in any doubt on how to proceed consult a qualified electrician. 3 way switch wiring diagram depicting all wires in the ceiling junction box. All work carried out should comply with all applicable wiring regulations. Incorrect installation will invalidate your guarantee. 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.
A one way light switch is quite easy to wire up.