With a pair of 3 way switches either can make or break the connection that completes the circuit to the light. 2 way light switch 3 wire system new harmonised cable colours 2 way switch 3 wire system old cable colours 2 way switch two wire control three way switching.

Diagrams And Help On Uk Electrical Wiring
Uk 2 way light switch wiring. A one way light switch has two terminals which is a common marked as com or c. To switch from two locations youll need 2 two way switches and wire them together in a particular way. Two way switching allows you to control a light from two locations. To switch from two locations youll need 2 two way switches and wire them together in a particular way. The other terminal is marked as l1 and is the output to the light fixture. The common is for the live wire that supplies the input voltage to the switch.
Wiring a one way switch. 3 way light switching new cable colours 3 way light switch old cable colours 3 way light switch using a two wire control. Connect the line brown wire coming from the light together with the 3 coreearth cable black wire in to the l1 terminal of the two way switch. Two way switch can be operated from any of the switch independently means whatever be the position of other switchonoff you can control the light with other switch. This cable consists of three cores brown grey and black which are all line colours and an earth wire. Wiring a 3 way light switch.
There is a chance that if your house has these old wiring colours the switch drops may be from a loop in loop out radial lighting circuit done with junction boxes rather than ceiling roses as shown in fig 2. For wiring a two way switch 3 coreearth cable is used. There will be a com common terminal a l1 terminal and a l2 terminal. Two way switching with the old wiring colours. The switch wiring is all the same but the switch wire cable c leads up to a different set up. Two way light switches are required for two way switching these can be identified by looking at the terminals on the back of the switch.
A commonc l1 and l2. The next length of the twinearth cable will run from the light to the first two way switch. Wiring a 3 way light switch is certainly more complicated than that of the more common single pole switch but you can figure it out if you follow our 3 way switch wiring diagram. A two way switch has 3 terminals. This is very useful in a number places particularly hallways and stairs. 2 gang 2 way light switch wiring diagram uk.
In position 2 when the switch is up or off com and l2 are connected together. Wiring a two way switch.