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 . There will be a Com (common) terminal a L1 terminal and a L2 terminal. Two way switching with the old wiring colours-
There are several ways to wire two way switching. Below is the way I like to do it. The way I show allows you to fairly easily add a second two way switch to an existing light switch by simply wiring them together in a certain way. A two way switch(uk) Schematic diagram of old wire colours : Schematic diagram of new wire colours : N.B.
The wiring diagram for a two-way switch starts at the power source and ends at the light bulb. It shows the black hot wire feeding from the switch to the housing where the bulb is attached. A white neutral wire from the power source is shown running parallel to the hot wire, bypassing the switch and intersecting with itself to complete the circuit.
The switches at each end are 1 pole 2 way switches; Any number of intermediate crossover switches may be added to give three or more switching positions. Alternative method of Three Way Switching. This is an alternative deprecated form (see above for the reasons) of the multi way switch wiring: The switches at each end are 1 pole 2 way switches
How to wire a 2 way lighting circuit - In this video I show how to wire a light that can be turned on and off with two different switches. I use simple electrical diagrams to show how to do the
2 way switching means having two or more switches in different locations to control one lamp.They are wired so that operation of either switch will control the light. This arrangement is often found in stairways, with one switch upstairs and one switch downstairs or in long hallways with a switch at either end.