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Two way switching | wiring a two way switch


Connection of a two way (double) lighting system

A two way lighting system is a system which can control a lighting point from two positions. In the connection of this system, two 2-way switches are required to control the lighting point from the two positions.
Let’s now look at how the terminals of the 2 way switch looks like and how it is used. 
It has 3 terminals (COM, L1, L2) see the figure below. One switch at position 1 and the other at position 2.
Two way switch and terminal
Two 2 switch showing it's terminal

Connection

Now let’s look at the connection.
From the above diagram, connect the COM of Switch 1 to the live, then L1 and L2 of Switch 1 connected to L1 and L2 of Switch 2. Then connect the COM of switch 2 to one terminal of the lamp and the other terminal of the lamp to the neutral and you are done with the connection.
two way switching
Connection of a 2 way lighting system
Now let’s see how it operates to put on the lamp.

  •   Pressing any of the switch puts ON the lamp. In our case we press S1
two way lighting
2 way switching lamp ON
  Pressing again any switch puts it OFF. For example we have pressed S2
2 way switch

      Pressing the other switch puts it ON.
two way switch

      Pressing any again puts it OFF.
wiring a two way switch

So we see that we can put ON and OFF the lamp at any of the two positions.
A two way switch can also be of double gang (two 2 way switches in a single structure). See the figure below

Double gang two way switch
Double gang 2 way switch

Boom, you can now connect a two way lighting system. For any worries, Leave your comment.

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