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#30760 - 10/27/03 10:57 AM splicing grounding electrode conductor
donles Offline
Member
Registered: 04/28/01
Posts: 83
Loc: Pennsylvania
Does any one splice or tap to the GEC?
What do you use? I'm upgrading a duplex with 100 amp panels side by side in the basement.
Rather than run two #6 solid cu from each panel to the ground rods outside, I'd like to run from one panel to the rods. Then run #6 from the 2'nd panel and tap onto the 1'st panel's GEC using irreversible compression-type connectors. I believe this is permitted by NEC 250.64 (C) and (D).

I've checked with 2 supply houses and they evidently do not carry a compression tool or the connectors. Anyone have experience with this?
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#30761 - 10/27/03 12:09 PM Re: splicing grounding electrode conductor
George Corron Offline
Member
Registered: 05/16/01
Posts: 717
Loc: Lorton, Va USA
Donles,
Burndy, Thomas & Betts, and Anderson are the ones that make the tools and materials off the top of my head. All of these can be found by a simple web search.

If you quit that solid habit, you can use a Cadweld, made by erico www.erico.com
These are reusable for a long time, and do not degrade like crimps or split bolts.
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#30762 - 10/27/03 01:27 PM Re: splicing grounding electrode conductor
donles Offline
Member
Registered: 04/28/01
Posts: 83
Loc: Pennsylvania
What is the ballpark cost for Cadweld?

I've found the cost of the T&B tools to be prohibitive for my infrequent use. Although I did see a Penn-Union tool on ebay for what is probably alot less than retail. Minimum bid $99 for a TDM-250 and the auction was winding down.
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#30763 - 10/27/03 02:01 PM Re: splicing grounding electrode conductor
Electricmanscott Offline
Member
Registered: 01/12/02
Posts: 1457
Loc: Holden, MA USA
I normally use a split bolt for this.
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#30764 - 10/27/03 02:26 PM Re: splicing grounding electrode conductor
Ryan_J Offline
Moderator
Registered: 08/19/03
Posts: 1374
Loc: West Jordan, Utah, USA
Split bolts are not irreversible. Perhaps you're thinking of an equipment grounding conductor and not a grounding electrode conductor?
_________________________
Ryan Jackson,
Salt Lake City
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#30765 - 10/27/03 02:37 PM Re: splicing grounding electrode conductor
iwire Offline
Moderator
Registered: 01/05/03
Posts: 4391
Loc: North Attleboro, MA USA
If you do a search on this site for cad welds you will find a thread that talks about one shot disposable cad welds for $5.00 I have not used them but it sounds like a great deal.
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts
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#30766 - 10/27/03 03:40 PM Re: splicing grounding electrode conductor
donles Offline
Member
Registered: 04/28/01
Posts: 83
Loc: Pennsylvania
I looked at Erico's site for the one-shot, inexpensive cadweld splices. Their site isn't the most user friendly. I did come across mold # PG11L for #4 solid to #4 solid taps but no details. I'll have to call suppliers tomorrow.
Thanks.
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#30767 - 10/27/03 04:10 PM Re: splicing grounding electrode conductor
eprice Offline
Member
Registered: 08/07/03
Posts: 64
Loc: North Logan, Utah, USA
Ryan,

Couldn't 250.64(D) be used here, and wouldn't that allow the use of something like a split bolt to make a tap to a second enclosure as long as the GEC to the first enclosure meets 250.64(C) and is not spliced where the tap joins?
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#30768 - 10/27/03 04:24 PM Re: splicing grounding electrode conductor
Ryan_J Offline
Moderator
Registered: 08/19/03
Posts: 1374
Loc: West Jordan, Utah, USA
EPRICE: Thanks! I got so caught up the topic starter's question of how to do it irreversibly that I didn't look at the code. Good catch.

Scott: Sorry!
_________________________
Ryan Jackson,
Salt Lake City
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#30769 - 10/27/03 05:20 PM Re: splicing grounding electrode conductor
donles Offline
Member
Registered: 04/28/01
Posts: 83
Loc: Pennsylvania
Care to expand on that a little?
Meanwhile, I'll consult the code.
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