2 Way Light Switch Wiring 3 Core. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light. Wires consisting of a line a load a neutral a pair of travelers and two 3 way switches.
If you are trying to troubleshoot a 3 way switch operation you will need to identify the function of each wire. Two way lighting circuit using three core earth cable line diagram of a two way lighting circuit using junction boxes fig 1. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light.
All three way switch and 2 way switch wiring diagrams have the same basic components.
A two way switch has 3 terminals. All three way switch and 2 way switch wiring diagrams have the same basic components. All earth wires should connect to the earth terminal in the switch back box and if you are using metal switches there must be a loop from this earth terminal to the one on the switch plate see note a on. Each of the gangs or switches above in fig 2 of which there are two work like this fig 3.
