A commonc l1 and l2. Each of the gangs or switches above in fig 2 of which there are three work like this fig 3.
This diagram shows two switches in the same box with a separate 120 volt source feeding each.
2 gang 2 way light switch wiring diagram. Some brands of light switch may have slightly different labeling on the terminals such as c l1 l2 or even l1 l2 and l3. In position 1 when the switch is down or on com and l1 are connected together just like the one way switchin position 2 when the switch is up or off com and l2 are connected together. Two way switching allows you to control a light from two locations.
3 way light switch wiring 2 wire system this switch arrangement is basically two two way switches on a single face plate. A two way switch has 3 terminals. To switch from two locations youll need 2 two way switches and wire them together in a particular way.
You can use it as a one way switch by using the com and l1 terminals only. This is very useful in a number places particularly hallways and stairs. You dont see these as much now days as many manufactures only make 2 gang 2 way light switches that serve the same purpose you just dont use the third l2 terminal on each gang however i thought we would include it just in case you come across one.
Wiring a two way switch. This type of light switch is used where two switches control the same light such as at the top and bottom of a stairway. Wiring two switches in one box with 2 sources.
Three wire cable is supplying the source for the switches and the black and red wires are each connected to one switch.
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