Grounding a gas line

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gregs238

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can you ground a house of a gas line??? I don't think so but, i went to a house today built in 2004 in Marion Co and the only ground there is is a bare #4 going from the meter can to the gas line going into the house...I check the houses around this house and all of them are done the same way... Is this safe...does it need to be grounded with ground rods??
 
A metal underground gas line can't be used as a grounding electrode. (See 250.52(B)).

But, metal gas piping that is likely to become energized must be bonded in accordance with 250.104(B)

Also the house must have a grounding electrode system as specified in 250.50. This section requires that all grounding electrodes as specified in 250.52 that are present must be bonded together and to the grounded conductor at the service disconnecting means to form the grounding electrode system.

Chris
 
Typically you do not ground the gas line with a #4. If the service is 200 amps then a #4 would be required to the water lines. You also need 2 ground rods. The gas lines are bonded thru the egc of the circuit that feeds the furnace or range.
 
Dennis Alwon said:
.......................................... The gas lines are bonded thru the egc of the circuit that feeds the furnace or range.
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Unless it's CSST. Then it's a whole 'nother ball game. :smile:
 
wbalsam1 said:
Unless it's CSST. Then it's a whole 'nother ball game. :smile:
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Yes, we all know that all too well. However if it is counterstrike CSST made by Omegaflex then it does not need additional bonding. Just wanted to complicate the issue
 
As others have said a # 14 may be all that is required to bond a gas line. When lightning strikes it knows not to include any buried metallic gas line in its path. I just know that the 75' of 1 1/4" buried steel pipe out to my gas meter is not as good a GE as my three ground rods. I am not using it as a GE, I just bonded it with a #6 because it was handy.
 
This has become a controversial topic and a lot of local areas are now writing in a requirement to require the gas piping system to be bonded the same as the metallic water lines and sized with Table 250.66. If you don't know for sure, check with your local amendments. :)
 
Gas Piping bonding

Gas Piping bonding

Does the NEC specifically require metal gas piping to be bonded?

Thanks,

Jay
 
wbalsam1 said:
A henweigh must be inserted into the grounding plane. ;)
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I think most everyone is aware of that. :grin:

Roger
 
Dennis Alwon said:
Let him have his fun. What's a henweigh?
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No one else has tackled this, yet, so I'll do it.

The answers:
Bout 2 pounds, plucked.
2 to 10 pounds.
I'll tell ya when it when it gets to my side of the road.
:roll:

ptonsparky said:
I believe lightning is DC so a rectifier should work at least part of the time.:rolleyes:
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Ah, well, there you go! Lightning is DC, and AC and DC don't mix, so you'll have no problem, the DC will just run down the copper pipe until it hits something with AC and turn around...:rolleyes: :D
 
The gas utility in this area has always used a dielectric fitting at the line side of the gas meter to isolate the underground gas piping from the interior bonded gas piping. Not it really does matter as they no longer use metal underground pipe...it is all nonmetallic in this area.
 
gregs238 said:
can you ground a house of a gas line??? I don't think so but, i went to a house today built in 2004 in Marion Co and the only ground there is is a bare #4 going from the meter can to the gas line going into the house...I check the houses around this house and all of them are done the same way... Is this safe...does it need to be grounded with ground rods??
Click to expand...
As far as ive been informed youmay not ground anything to the gas line. Allthough if they have city water you can ground to there cold water line.
 
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