White Wire to Black Wire?

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Old 08-16-08, 11:00 AM
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Red face White Wire to Black Wire?

I'm remodeling my bathroom and I'm moving a light switch. I need a longer length of wire so I went to replace the Romex wire. I disconnected the light in my closet to get at it, and lo and behold there is a nuetral wire connected to a hot wire. i.e. white tied to black. I have never seen this before. Everything seems to work OK but this seems dangerous. The circuit includes lighting for several rooms in the house as well as closet lights connecting to automatic door switches. Is there EVER a reason to connect a white wire to black wires?
THANKS!!!! rashbaugh
 
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Old 08-16-08, 11:09 AM
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EVER a reason to connect a white wire to black wires?
Yes. This is how switch loops are done. Best practice is to recolor the white wire black (or red) or mark with colored tape but it often isn't done. A switch loop caries power to the switch on one conductor and back to the fixture on the other.

Side note: The white wire may also be used as one of the two hots on a 240 volt feed such as to a portable AC receptacle or a heater.
 
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