melted WHITE wire and nut

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  #1  
Old 02-04-00, 07:37 AM
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What would cause the WHITE wire and nut to burn (melt)in one junction connection of a grounded GFI circuit?
 
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  #2  
Old 02-04-00, 04:13 PM
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There are two possible reasons.
1. A loose connection will generate a lot of heat and will melt down a wirenut.
2. If this is a shared neutral, one of the breakers of the shared pair got put on the same 120 volt side of the panel, thus causing your neutral to carry a 40 amp potential load. This will generate heat over a wire that should only be carrying 20 amps.
3. Even if not a paired circuilt, if it is reaching max load and has been for some time and for long periods when in use, it will tend to burn out if any other conditions aggravte it, such as being loose.
A loose connection occurs because of heat expansion, either current or atmosphere. It is a cycle that if it is getting hot, it breaks down, and less and less current is carried, thus causing it to heat up even faster until meltdown.

 
  #3  
Old 02-05-00, 01:21 PM
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hello most common cause of wirenuts melting is loose connections or over sized breakers. usually if its due to an oversized breaker both the hot and the nutural will be like that, due to the wires carrying more load then they shuld. 1 other possabilty is that u have a bad gfi if its only the 1 connection id be willing to bet its a loose connection causeing the problem.
 
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