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#179393 - 07/10/08 02:38 PM Two questions and where to find the answers - NEC
bwise121 Offline
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Registered: 09/11/03
Posts: 114
Loc: Sacramento, CA USA
1. Assume a house has a ufer and the water and gas are done in plastic or the flexible gas pipe. Neither are metal, do we still have to bond them?

2. Protecting the main grounding electrode conductor with conduit, etc. pertains to what sizes of conductor?

Thanks,
Byron
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#179394 - 07/10/08 03:53 PM Re: Two questions and where to find the answers - NEC [Re: bwise121]
gfretwell Offline


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Registered: 07/20/04
Posts: 9039
Loc: Estero,Fl,usa
If the interior piping is plastic how would you bond it?
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#179396 - 07/10/08 04:32 PM Re: Two questions and where to find the answers - NEC [Re: gfretwell]
bwise121 Offline
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Registered: 09/11/03
Posts: 114
Loc: Sacramento, CA USA
the stubs under sinks are copper. But I really don't see any point in doing so...just asking.

Thanks
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#179400 - 07/10/08 05:29 PM Re: Two questions and where to find the answers - [Re: bwise121]
gfretwell Offline


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Registered: 07/20/04
Posts: 9039
Loc: Estero,Fl,usa
It is not really a code issue but I would still bond a steel sink to the EGC of the counter receptacles via the copper piping. I couldn't cite a code section tho. I have a stainless counter top and sink in my kitchen and it is bonded to the cooktop EGC (no neutral load) and receptacle EGCs.

If you have a disposal it is probably bonding a steel sink.

... but I am a bonding freak. The steel in my driveway is bonded.
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#179403 - 07/10/08 07:59 PM Re: Two questions and where to find the answers - NEC [Re: bwise121]
sparkyinak Online   content
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Registered: 07/08/07
Posts: 1307
Loc: Alaska
Originally Posted By bwise121
1. Assume a house has a ufer and the water and gas are done in plastic or the flexible gas pipe. Neither are metal, do we still have to bond them?

Nope, how?

Quote:
2. Protecting the main grounding electrode conductor with conduit, etc. pertains to what sizes of conductor?

All of them. 250.64
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#179407 - 07/11/08 06:42 AM Re: Two questions and where to find the answers - NEC [Re: sparkyinak]
Jim M Offline
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Registered: 08/10/01
Posts: 457
Loc: Chestertown, MD, USA
I believe that there are bonding requirements for the CSST? flexible gas lines. These may come from the piping manufacturer, not the NEC.

After looking found this.
http://www.toolbase.org/pdf/techinv/csst_lightningconcerns.pdf


Edited by Jim M (07/11/08 06:43 AM)
Edit Reason: added pdf link
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#179408 - 07/11/08 09:30 AM Re: Two questions and where to find the answers - NEC [Re: Jim M]
Gregtaylor Offline
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Registered: 03/02/05
Posts: 212
Loc: Boise, Idaho, USA
I think Sparky's answer is oversimplified. It's never wrong to protect them with conduit as long as a steel conduit is choked on both ends, but 250.64 (B) certainly says that there are situations where a grounding electrode conductor size 6 or larger may not require conduit as a means to physically protect it. Guys?
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#179410 - 07/11/08 04:31 PM Re: Two questions and where to find the answers - NEC [Re: Gregtaylor]
sparkyinak Online   content
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Registered: 07/08/07
Posts: 1307
Loc: Alaska
When not subject to physical damage. A common issue I see in unprotected grounds is exposure to weed whacking and brushing around the ground wire.
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