Bonding gas line

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J-R

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Anyone here ever been told they had to bond gas line where it enters house? Inspector is requiring a full sized grounding electrode conductor sized in 250.66 table for a gas line. I have never heard of this before and even though not required I bonding the gas line with the #6 from inter system bonding terminal??
 
The only time you would bond the gas line with a grounding conductor from your service is if there is CCST type flexible gas line also attached to the metal gas line. And that would only be required to be #6.
Otherwise it is effectively bonded by the branch circuit grounding conductor that attaches to the equipment that is also attached to the gas line ex. a furnace.

Gas code does not allow you to treat a gas line as a grounding electrode, even if it were to be metallic underground to your home. Although the process of bonding in itself would create this condition it' s just not recognized as a grounding electrode.

If anything maybe the inspector is recommending it be bonded in the event in the future there could be CCST flex line installed, still #6 is all that's needed.
 
Yes forgot to mention the ccst and do agree it should be bonded which is why I grounded it with #6 but I don't understand him wanting it bonded where it enters house it should be able to be bonding anywhere after the ccst connection correct?
 
That would be it then. Infinity I appreciate the info it looks like I can bond this to the grounding electrode conductor at the water meter as long as it's an irreversible connector then
 
J-R said:
That would be it then. Infinity I appreciate the info it looks like I can bond this to the grounding electrode conductor at the water meter as long as it's an irreversible connector then
Click to expand...


Why do you think it needs to be irreversible?
 
Also if you bond to the intersystem bonding terminal you could get tagged for it since that device is not rated for for that use.. Bogus I know but it has been question. The issue is that the nec requires ---
Consist of a set of terminals with the capacity for connectionof not less than three intersystem bonding conductors.
Click to expand...
so when the bond for the gas pipe is installed that often reduces the connections to 2... at least the ones I have seen only have 3 places. Easy fix is to add another intersystem bonding block
 
Load Side

Load Side

Bonding of CSST needs to be done on the Load Side (GFCI get it) of the Gas Meter. If Gas Meter is on outside of house it needs to be done on exterior with exterior rated and bonding clamps. Or on the inside of the house as close as possible to the entry piping. Bond to any grounding electrode available. (Many incoming water services are PVC so do not count)
 
I've dealt with this issue a lot in my neck of the woods. What I have discovered is the gas code changed and we can now bond it on any point of the gas system. It's spelled out pretty well in a tech bulletin on this website:

http://www.csstsafety.com/CSST-solution.html

When I dug into it I found that early editions of the 2015 National Fuel Gas Code (NFPA 54) state the following:

7.13.2.1 The bonding jumper shall connect to a metallic pipe or fitting between the point of delivery and the first downstream CSST fitting.


The revised edition of that same publication that came out sometime later states that same code as the following:


7.13.2.1 The bonding jumper shall connect to a metallic pipe, pipe fitting, or CSST fitting.


Obviously the revised edition doesn't state a location so it is taken as we can bond at any point on the system. I have confirmed this with a couple gas inspectors.
 
Also, watch out for bonding the Gastite brand directly on the brass fitting... They require a specific bonding clamps made by Erico. It's pretty frustrating to send someone back out to a finished project to just change a bond clamp out to a different brand...
 
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