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Discussion Starter · #1 ·
I replaced a switch that I thought was bad. When I turned power back on and fliked the new switch it sparked but did not trip the breaker. I then checked the old switch because I was at wits end. It check out OK as did the new switch after the direct short issue. I did the check with a continuity meter. Any help appreciated.
 

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The switch was installed in the box with one of the screws touching the side.
or
The ground wire was touching the one of the screws.
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There is a bare spot on one of the wires that was touching the box.
or
 

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pictures? how many wires in the switch box, and what condition are they in; older wiring or newer? Did you do more than simply disconnecting two switch leads on the old, and reconnecting on the new switch?
 

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Master Electrician
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or
the line in and neutral are hooked to the switch
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there is a short in the wiring leaving the switch box
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the load the switch is controlling has a short
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the wiring at the load has a short
or
 
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