damaged wire insulation?? THHN

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ga1212ett

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hello,
so im sure everyone is familiar with the "sim pull" technology for single insulated conductors, and im sure many have scuffed it up. Am i wrong to think that the most outer, clear part of the jacket is strictly for the sim pull purpose? I managed to peel some back while pulling thhn/thwn-2 4/0 wire, 200 ft run. The wire still passed the megger with 4000m ohms. I am looking to see if anyone can see a reason why the wire would need to be replaced, possibly if that part of the insulation has something to do with moisture protection. I noticed the local inspector feeling the damage as well. I can try to add photos if necessary but im assuming it is clear what I am talking about.
 
ga1212ett said:
I noticed the local inspector feeling the damage as well. I can try to add photos if necessary but im assuming it is clear what I am talking about.
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Yes, what you're talking about is clear. ;)

What was the inspector's conclusion? I personally wouldn't sweat it, looking at it as sacrificial.
 
Someone told me that was the gasoline/oil resistant layer, and not critical except for that.

Dunno exactly what it is, except that it's NOT the insulation. I've pulled plenty of old stuff where the UV has knocked it off for me anyway.
 
The inspector is more in the general construction field so he does not have the expereince to bring it up now, but that wont mean that he wont. I do not blame him for his suspicions though, especially since I don't even know how vital that scuff is. Does anyone have any literature on the lack of importance of the nylon jacket? I have found some on southwire.com but it does not make a definitive difference in the protection layers. As of today the only proof of wire quality I have is the megger results.
This damage is very common as we all know that is why I am interested in the literature for future reference as well.
 
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