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Grounding a Plumbing Drain Pipe bobfredonia 06-25-2008
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Posted by on June 25, 2008, 2:36 pm
The building inspector came over yesterday and said that most of my
remodeling looked fine. However he said that I must ground the drain
pipe where it exits the house before going to the septic tank. I
questioned how to do this, and he said to drive two ground rods at
least ten feet apart, connect them together with #6 bare cable, using
ground rod clamps, and connect the cable to the pipe with an approved
clamp. I have called every electrical and plumbing supply store in
the area and no one sells an approved clamp for 4 inch schedule 40 PVC
pipe. When I called the inspector and asked him where to get the
clamp, he got real rude and said it is not his job to do my shopping
and suggested using the internet. I am not finding anything online
either. Where can I get one? (He said I can NOT use a large hose
clamp, which I suggested).

Bob

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Posted by ransley on June 25, 2008, 3:24 pm
On Jun 25, 1:36=A0pm, bobfredo...@yahoo-nospam.com wrote:
> The building inspector came over yesterday and said that most of my
> remodeling looked fine. =A0However he said that I must ground the drain
> pipe where it exits the house before going to the septic tank. =A0I
> questioned how to do this, and he said to drive two ground rods at
> least ten feet apart, connect them together with #6 bare cable, using
> ground rod clamps, and connect the cable to the pipe with an approved
> clamp. =A0I have called every electrical and plumbing supply store in
> the area and no one sells an approved clamp for 4 inch schedule 40 PVC
> pipe. =A0When I called the inspector and asked him where to get the
> clamp, he got real rude and said it is not his job to do my shopping
> and suggested using the internet. =A0I am not finding anything online
> either. Where can I get one? =A0(He said I can NOT use a large hose
> clamp, which I suggested).
>
> Bob

Is drain metal or pvc, plastic pipe does not conduct electricity, you
cant ground Pvc.

Posted by dpb on June 25, 2008, 3:31 pm
bobfredonia@yahoo-nospam.com wrote:
> The building inspector came over yesterday and said that most of my
> remodeling looked fine. However he said that I must ground the drain
> pipe where it exits the house before going to the septic tank. I
> questioned how to do this, and he said to drive two ground rods at
> least ten feet apart, connect them together with #6 bare cable, using
> ground rod clamps, and connect the cable to the pipe with an approved
> clamp. I have called every electrical and plumbing supply store in
> the area and no one sells an approved clamp for 4 inch schedule 40 PVC
> pipe. ...

This makes absolutely no sense.

Grounding is for electrical systems, not plumbing. Electrical ground
used to be required to be tied to _SERVICE_ water entrance as it used to
be it was always metal, but even that isn't so any longer, necessarily.

I'd call the building permit office and request the supervisory person
to clarify the actual requirement and code section supposedly in violation.

--

Posted by M Q on June 25, 2008, 3:59 pm


dpb wrote:

...
> Grounding is for electrical systems, not plumbing. Electrical ground
> used to be required to be tied to _SERVICE_ water entrance as it used to
> be it was always metal, but even that isn't so any longer, necessarily.

Check out 2005 NEC 250.4(a)(4) and 250.104(a)(1).
You need to ground your metallic plumbing.


Posted by dpb on June 25, 2008, 4:42 pm
M Q wrote:
>
>
> dpb wrote:
>
> ...
>> Grounding is for electrical systems, not plumbing. Electrical ground
>> used to be required to be tied to _SERVICE_ water entrance as it used
>> to be it was always metal, but even that isn't so any longer,
>> necessarily.
>
> Check out 2005 NEC 250.4(a)(4) and 250.104(a)(1).
> You need to ground your metallic plumbing.

This is PVC according to OP, which last time I checked wasn't metallic...

--



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