Light Wiring Diagrams

2 gang 1 way light switch

You don’t see these as much now days as many manufactures only make 2 gang 2 way light switches that serve the same purpose (you just don’t use the third L2 terminal on each gang), however I thought we would include it just in case you come across one!

Basically, this is just two single way switches on one face plate

Double gang swith face plate

Double gang switch face plate

Double gang one way light switch

Fig 2: Double 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 two) 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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2 gang 2 way light switch

This switch arrangement is basically two two way switches on a single face plate.

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

Double gang swith face plate

Double gang switch face plate

Double gang two way light switch

Fig 2: Double gang two way light switch

Switch mechanism

Two way light switch mechanism

Fig 3: Two way light switch mechanism

Each of the gangs (or switches) above in Fig 2 (of which there are two) work like this (Fig 3): 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 are no connections between the two gangs in Fig 2. Each gang is a single discreet switch.

Just to be different:)

The terminals on your switch may be a little different to those shown above but rest assured they function just as described above but the terminal pins are in different positions. You may see the following:

double gang two way light switch terminal variation 1

double gang two way light switch terminal variation 1

double gang two way light switch 3

double gang two way light switch terminal variation 2


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2 gang intermediate light switch

The intermediate light switch is used where three or more switches control one light and used in conjunction with two two way light switches to achieve this. It is effectively two single gang intermediate switches on one face plate.

Double gang swith face plate

Double gang switch face plate

Double gang intermediate light switch

Fig 2: Double gang intermediate light switch

Light switch mechanism

Intermediate light switch mechanism

Fig 3: Intermediate light switch mechanism

Each of the gangs (or switches) above in Fig 2 (of which there are two) work like this (Fig 3): There are four terminals, usually L1, L1 and L2, L2. In one position, L1 and L2 are connected in pairs. In the other position, alternate pairs are connected.


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