1 Gang, 2 Gang & 3 Gang 1 Way Switch Connection | How to Wire Light Switch

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What is a 1 gang 1-way switch?
For example, when a switch is a one gang one-way switch, it means there is one switch on the plate. It's likely to acquire more,

There are two terminals in a one way light switch. When the switch is on, both terminals are connected together.

Typically, these terminals will be marked COM and L1 (sometimes L1 and L2). Although technically, it doesn’t matter which way round you connect the wires, it is best to stick to convention and connect the permanent live (from the supply) to COM and the switched live (to the lamp) to L1.

This is the most common type of switch and is used where a light is controlled from a single switch (although you will often see a two-way switch used, with one terminal left unused).

This is fairly obvious, but when the switch is ‘on’ the COM and L1 terminals are connected together. When ‘off’ they are not.

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What is 2 gang 1-way switch?
They are sometimes called rockers, throws or dimmers, depending on how they operate, but still, they just refer to the number of light switches on the plate. ... A 1 gang switch will control a single lighting circuit, and with a 2 gang switch, you can control two lighting circuits, and so on.

You don’t see these as much nowadays 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 faceplate.

Each of the gangs (or switches) (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. Each gang is a single discreet switch.

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What is a 3 gang 1-way switch?
It is possible to get more, but it is very uncommon to have more than three in a domestic setting – this would be called a 3 gang switch. ... A 1 gang switch will control a single lighting circuit, and with a 2 gang switch, you can control two lighting circuits, and so on.

This format of light switch has three discreet switches on a single faceplate. Basically, this is three Single gangs 1-way switches on a single faceplate.

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).

Each of the gangs (or switches)(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. Each gang is a single discreet switch.

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