wire pull damage?


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Old 04-28-15, 08:36 AM
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wire pull damage?

What occurs when wire gets nicked when pulling thru metal conduit?
 
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Old 04-28-15, 09:04 AM
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The insulation can become damaged that may cause short circuits.
 
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Old 04-28-15, 09:08 AM
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A small knick in the outer clear nylon insulation is pretty much unavoidable and is of little consequence. A knick through the thickness of the insulation and into the metal is enough damage to replace the wire. It can short out to other wires or to the conduit. Best case the breaker trips, worst case it arcs a hole through the pipe or melts adjacent wires and lights something on fire. In the case of an exterior conduit it can allow water into the wire which will eventually corrode it.
 
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Old 04-28-15, 09:27 AM
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thx for explanations.

I had pulled wire for a circuit 6 months ago. I had a real hard time pulling and pushing the wire thru. I got the job done and everything is working as its intended, but its always stayed on my mind on how hard of a time I had.

Fear of the unknown I guess.

Short of buying a megger, what can I do to rest easy?
 
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Old 04-28-15, 09:53 PM
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Short of buying a megger, what can I do to rest easy?
Realize that damaged wires don't grow. They're made. And when they're made, they announce their presence as soon as load is applied.

Short version: If it hasn't blown up by now it should be good for decades.
 
 

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