ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Square D "All-In-One" Panelboard
by gfretwell - 02/18/20 07:38 PM
15 amp outlets removed due to cell phones
by mbhydro - 02/13/20 11:38 PM
2020 code
by shortcircuit - 02/11/20 04:30 PM
Anyone use rubber amalgamating tape?
by gfretwell - 02/06/20 11:17 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (Scott35), 87 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Insulated cover for Split bolt #176509 04/04/08 02:24 PM
Joined: Nov 2001
Posts: 75
Bill39 Offline OP
I've got a project where we're going to use split-bolts (Kearny's) to make some joints up and I don't want to tape them up (area is indoor & dry). Who makes those insulated plastic "clamshell" covers for that purpose? Or what is another trade name for them? I couldn't find it on

It's been awhile since I've needed these and I can't
remember the manufactuer or what they were called.


Work Gear for Electricians and the Trades
Re: Insulated cover for Split bolt [Re: Bill39] #176510 04/04/08 03:11 PM
Joined: Jan 2005
Posts: 315
luckyshadow Offline

Why not use the ones made by Polaris? They have the insulation on them already and have openings to insert the conductors and and an opening to insert the allen wrench for tightening. They can be ordered for just about any size and any number of conductors. We use them a good bit and they are better then taping and removable covers.
go to

Re: Insulated cover for Split bolt [Re: luckyshadow] #176511 04/04/08 04:42 PM
Joined: Nov 2001
Posts: 75
Bill39 Offline OP
I'd prefer to use something like those but I believe split bolts are about the only thing that will work in this case.

The main conductor runs straight thru the wireway and cannot be cut. So I need to just strip off the insulation and slip the split-bolt over it and connect my tap conductor.

Those Polaris connectors do look nice though.

Re: Insulated cover for Split bolt [Re: Bill39] #176514 04/04/08 06:45 PM
Joined: Jul 2004
Posts: 9,439
gfretwell Offline

Greg Fretwell
Re: Insulated cover for Split bolt [Re: gfretwell] #176530 04/05/08 11:09 AM
Joined: Jun 2007
Posts: 301
JValdes Offline
I very rarely use split bolts anymore, but here is how I insulated them. First wrap with varnish cambrick, glue side up. Then turn and wrap with glue side down. The reason is then if you have to cut off the insulation, it will come off in one peice. Next scotch elect. tape, then the fabric tape. Use plenty of each.
Sure am glad they have made life easier for us now. The split bolt still has its place, but very few places. Yours could be one. I am not familiar with "Kupletap".

Re: Insulated cover for Split bolt [Re: JValdes] #176533 04/05/08 12:07 PM
Joined: Jul 2004
Posts: 9,439
gfretwell Offline
That is a brand name for one of these

Google comes up empty so either I am spelling it wrong or this is the new name

Greg Fretwell
Re: Insulated cover for Split bolt [Re: gfretwell] #176535 04/05/08 02:24 PM
Joined: Feb 2003
Posts: 687
Active 1 Offline
This maybe what your looking for. Aluminum parallel or tee gutter tap connectors and also the insulating covers. Duel rated for cu or al, sizes from #14 to #500. With many configurations of 1 thru 4 taps and taps being parallel or 90 of the taped conductor. This one if from penn-union copp. The tapped conductor fits inside with a cover set screw seperate that slides on top (like you see on some meters).

A few examples:

Re: Insulated cover for Split bolt [Re: gfretwell] #176537 04/05/08 05:45 PM
Joined: Jul 2007
Posts: 1,335
sparkyinak Offline
Originally Posted by gfretwell
This style of connectors has been around for years. I have a site up here and that it riddled with these type of conncectors. They have teeth that bite into the wire. I do not like how they make contact the wire. They appear to have minimal surface contact and damaging to the strands. there has been a few connectors ther have failed over the years. Not a good thing.

I typically use a good ol' fashion split bolt. I put a layer of cheap tape sticky side up. Then I wrap the split bolt with mastic pad the rap the pad tightly with a good quality tape. If the split bolt needs to be removed, all you have to do is run the utility knife down the side of the split bolt and the covering peals back like a bananna skin and just as easy. I have never had a failure with this type of setup.

I have also used the Polaris for the first time just a few months ago. They are little spendy but make for a quick splice so the added cost may be warranted. The only problem with them is the are very limited on the wire size so on a service rig, you have to carry more of them then split bolts in order to cover a same range of wire sizes. Tapping different size conductors are difficult too with Polaris connectors unlike with a split bolt and you do not have to cut the cable.

"Live Awesome!" - Kevin Carosa
Re: Insulated cover for Split bolt [Re: Bill39] #176540 04/05/08 06:31 PM
Joined: Sep 2005
Posts: 421
togol Offline



2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Portland, Oregon, United States
Posts: 404
Joined: March 2007
Show All Member Profiles 
Top Posters(30 Days)
dsk 11
djk 6
Admin 3
Popular Topics(Views)
263,486 Are you busy
198,572 Re: Forum
187,488 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3