Outer covering on large conductors?


Old 06-07-19, 02:54 PM
Thread Starter
Join Date: Jan 2019
Posts: 67
Received 0 Votes on 0 Posts
Outer covering on large conductors?

Do larger guage wire have a protective outer layer over the insulation like you see on regular thhn/thwn wire? (im refering to the clear (thermoplastic?) outer layer that gets nicked up when you pull wire).

I have service entrance conductors that look split. 3 individual conductors not a cable, I assume 8awg or 6awg. They are only a few years old. I dont see bare copper though under the split and it looks an outer later is curling in the sun or was split/nicked when pulling.

unfortunately my photo is poor.
Attached Images  
Old 06-07-19, 03:00 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,943
Received 44 Votes on 42 Posts
Sometimes they do, sometimes they don't. The conductors the power company use tend to not have a nylon sheath, but the polyethylene insulation is quite thick and durable. If the electrician who installed your service used THHN there will be a nylon sheath, but if they used XHHW or USE there likely won't be. From what I can see in the pictures, your service drop and drip loops look normal and are in OK condition.
Old 06-07-19, 03:08 PM
Thread Starter
Join Date: Jan 2019
Posts: 67
Received 0 Votes on 0 Posts
Thanks, Im pretty sure its THHN, i doubt they used anything above and beyond the minimum required.
Old 06-07-19, 04:33 PM
Tolyn Ironhand's Avatar
Group Moderator
Join Date: Nov 2007
Location: United States
Posts: 13,802
Received 252 Votes on 220 Posts
That is just the nylon coating on the conductors splitting. It is not an issue.
Old 06-08-19, 05:30 AM
Join Date: Mar 2010
Location: USA
Posts: 4,291
Received 109 Votes on 101 Posts
deleted ....................................

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: