2 Way Switching
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2 way switching means having 2 or more switches in different locations to control one circuit. They are wired so that operation of either switch will control the light(s).
To achieve 2 way control the usual single switch is replaced with either of the following circuits:
2 Way Switching:
o------------------------------------o
/
------O O------
/
o------------------------------------o
a switch cable run switch b
3 Way Switching:
o---------------o o----------------o
/ \ /
------O X O------
/ \ /
o---------------o o----------------o
a switch cable crossover sw cable switch b
- a & b are the 2 connections that are used in place of the usual single switch
- the switches at each end are 1 pole 2 way switches
- Any number of crossover switches may be added to give 3 or more way switching.
- the cable runs are from one switch location to another
- 3 core & earth cable is usually used for 2 way switch circuits.