Finding what a switch controls

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Old 03-30-15, 09:34 AM
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Finding what a switch controls

Is there any tricks to find out what a "dead" switch controls? In my house I have several switches which seem to do nothing. They do not seem to control receptacles or obvious lights. They are definitely LIVE.
 
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Old 03-30-15, 10:17 AM
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They are definitely LIVE
How do you know? If you used a non contact tester you don't know for sure. Is there a cable coming into the box that when disconnected using a multimeter reads ~120v between black and white?
 
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Old 03-30-15, 10:34 AM
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The most common reason I've seen for a 'dead' switch is a switched receptacle - either still switched and no one knew about it or no longer switched but the wires just disconnected and the switch left to fill the place in the box.
 
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Old 03-30-15, 11:54 AM
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Adding to what Stickshift said. Sometimes someone replaces a half switched receptacle and doesn't remove the tab. You might look for receptacles close to the switch that has more then 4 wires (two cables or two cables, one with a red ).
 
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