Thinned Conductor Insulation?

[dinos]

Individual conductor strands are prominently showing in the attached photographs.

Could this be due to a routine manufacturing process, or could it be a defect in manufacturing or resulting from installation (e.g. improper pulling)?

 

[retirede]

I doubt it’s “thinned”. The insulation appears to be somewhat translucent. I have no idea if it’s made that way or the result of environmental conditions.

 

[infinity]

Doesn't look like an issue from the photo just the way it was manufactured.