Light Wiring Diagrams

3 gang 1 way light switch

This format of light switch has three discreet switches on a single face plate. Basically this is three Single gang 1 way switches on a single face plate.

The only place you would use such a beast is if you had three lights (or sets of lights) in a single room each controlled by one of the single switches. This arrangement is not common, you are most likely to find a 3 gang 2 way switch used (this will do the same job but you will have spare L2 terminals on each gang that you would not need to use).

Triple gang switch face

Triple gang switch face

Triple gang one way light switch

Fig 2: Triple gang one way light switch

Switch mechanism

One way light switch mechanism

One way light switch mechanism

Each of the gangs (or switches) above in Fig 2 (of which there are three) work like this: when the switch is ‘on’ the COM and L1 terminals are connected together. When ‘off’ the COM is connected to nothing.

There are no connections between the two gangs in Fig 2. Each gang is a single discreet switch.


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