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How to control One Lamp from three different places? (by using two, 2-Way switches and one intermediate switch)

 How to control One Lamp from three different places by using two, 2-Way switches and one intermediate switch?You may read about intermediate switch.
What is Intermediate switch, its construction, working principle and using in different wiring(lighting etc) circuits?

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How to control One Lamp from three different places
OR in more simple way...
How to control One Lamp from three different places
You may read about intermediate switch.
What is Intermediate switch, its construction, working principle and using in different wiring(lighting etc) circuits?

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