Wire insulation damge: when to be concerned?


  #1  
Old 09-03-19, 08:13 PM
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Wire insulation damge: when to be concerned?

During pulling in wire into a 90 degree elbow like this:
https://www.homedepot.com/p/Halex-3-...4407/100111131

I noticed that a 6 AWG stranded wire outer skin was slightly damaged. It append when when squeezing in the loop into place. I t almost seems that there is an outer foil layer and inner insulation. It seems the outer foil only got damaged. I can put electrical tape around it for extra protection. Or redo the pull.....

Just wondering if I should be concerned or not?

P.S. Did not expect inside of elbow be that sharp. Meanwhile, I put FMC Anti-Short Bushings inside.
 
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Old 09-04-19, 12:36 PM
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I would not be concerned if just the outer insulation is damaged.
 
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Old 09-04-19, 02:34 AM
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Don't know all the circumstances involved here, but I would replace the wire because there is no way to determine the degradation of the insulation. Maybe the damaged portion can be cut out and the remaining piece used elsewhere.
 
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Old 09-04-19, 05:27 AM
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Hi, what type of cable is it? Not sure what the foil layer is ,can you post a pic?
Geo
 
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Old 09-04-19, 06:11 AM
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I attached two images: cable wrapper and a sample where I am trying to show outer insulation.

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Last edited by PJmax; 09-04-19 at 04:40 PM. Reason: resized pictures
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Old 09-04-19, 02:56 PM
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I agree. The outer jacket is the pulling cover that protects the insulation from damage.
 
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Old 09-04-19, 04:21 PM
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That is not foil. It is a clear nylon over the insulation.
 
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Old 09-04-19, 04:38 PM
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well, the outer layer it is not clear. It is black.
I could remove the damaged outer layer and see if it cut into the inner insulation.

But sounds like more than likely I am ok.
My other phase did not get damaged. My ground a little bit. But I don't think I should be concerned about ground in EMT.
 
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Old 09-04-19, 04:51 PM
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I would not be removing any more insulation than what is already damaged.
 
  #10  
Old 09-07-19, 06:24 AM
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might be overkill. But I replaced hot wire.
 
 

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