Split Bolts on Overhead lines

[ldahl]

Does anyone know if the NESC previously restricted the use of split bolts on overhead lines? If so, can you direct me to it or at least give me an explanation as to why the shouldn't be used? Thanks! (First-time user to this site!):-?

 

[steve66]

Welcome to the forum.

I really don't know the answer to your question. But I wonder if split bolts would be rated to carry the tension and weight of suspended wires.

Steve

 

[cadpoint]

Wow, I read up a little on google about your subject using "NESC-Split bolt", IE the term that I choose as a search term.HERE

Seems alot of AHJ's, both state and national have writen papers, killing it's usuage. Overhead it still seems allowed!

I thought everone were using irreservable compression or polaris type connections.


Any was...
First off the NESC is governed by IEEE , You can get there by using THIS

Here is a search at that site for "limit split bolt"

Using either Google, Standards.IEEE.org/nesc, use your description and search their sites using single or combinations of words separated by a dash - enjoy.

 

[wirenut1980]

I searched through the NESC 2007 and could not find anything specifically not allowing split bolt use. It says the connectors need to be able to handle the tension of the wires weight, weight of ice, and also tension caused by wind, which I am guessing none are rated for that. Compression splices are commonly used on slack spans, and automatic splices are used where there is tension on the conductor. I believe the code section is NESC Rule 261(H)(2).

 

[Don S.]

Thomas & Betts lists numerous split bolts for overhead line work on their site. I don?t think they would still be made if nobody was using them.