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I have three way switches and what to replace them but when...

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Question by tone
Submitted on 11/8/2003
Related FAQ: Electrical Wiring FAQ (Part 1 of 2)
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I have three way switches and what to replace them but when i looked at the older ones there are 2 termials on the bottom and one on the side,the new ones i purchased have 2 on the left side and 1 one the right,how do i know which wires go where?


Answer by Jack
Submitted on 3/31/2004
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     Actually the switches are the same.  The single screw is usually the common terminal and the others are travelers.  Three way switches work together in this way; the first switch powers the second which brings power to the light or outlet.  You can begin to check the switch by turning off the AC current to the switch to remove it. You could use a continuity tester on the old switch upon removal.  Check to see which of the three terminals is the common terminal and which are the travelers. Power to common, travelers connect and then common to light or outlet.  

Jack Berky

 

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