In previous post,we look out about two way switch for stairs. But there's a problem when your house have too many stairs. If you have too many stairs it's hard to control the lights because it's take time to come upstairs and down stairs. So the solution for this problems is by using intermediate switch. This switch allows you to turn on and off the light. It's locate between 2 two way switches. so while you go upstairs or downstairs, you can use intermediate switch to turn off the light.
Intermediate switch have 4 connection . This switch don't have common because it doesn't require power,the switch job is to switch off the light between two switches. it has L1,L2,L3, and L4. so the wiring is simple to wired the connection.
There's two way to wired the switch. one are wired in straight and other are wired in cross.
In order to use the switch let's look out the picture below shown.
When the intermediate switch is Off,the bulb will light up by S1 On and S2 Off.
To switch off the bulb by intermediate switch,the switch must O,so the bulb will not light up as the picture shown below.
The symbol for this intermediate switch is :
Now the problem is Solve for so many stairs.Now you can play with the three switches to turn on and off the light
is the switch looped already or it needs looping?
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