Light Wiring Diagrams

Single gang 2 way light switch

A two way light switch has three terminals and is quite like a sigle way switch but now the ‘off’ position can be utilised also.

Some brands of switch may have slightly different labeling on the terminals (such as C L1 L2 or even L1 L2 and L3).

This type of switch is used where two switches control the same light, such as at the top and bottom of a stairway. You can use it as a one way switch, by using the COM and L1 terminals only.

single gang switch face

single gang switch face

Single gang two way light switch

Single gang two way light switch

Switch mechanism

Two way light switch mechanism

Two way light switch mechanism

In position 1 (when the switch is down or ‘on’), COM and L1 are connected together (just like the one way switch). In position 2 (when the switch is up or ‘off’), COM and L2 are connected together.

There is never a connection betweeen L1 and L2.


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