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Old 01-18-2011, 10:08 PM   #1
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LP Gas line bonding


Finishing up my electrical on new house. Do I have to bond the gas pipe for the LP furnace to the concrete encased electrode (Ufer)? The furnace and Ufer stub are in the crawl space. The reference I have says the bonding wire size is based on the electrical feed to the furnace which is a 15 amp circuit. My LP supply is fed to the house underground by copper line. From the second regulator (the one on the house) gas is fed into the crawl space with yellow plastic covered flexible pipe. There is an iron tee for a take off to the tankless water heater and another tee for the kitchen stove. The line ends at the furnace where it connects to 1/2 black iron pipe. What needs bonding?

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Old 01-18-2011, 10:12 PM   #2
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LP Gas line bonding


ask your inspector.

The gas line is supposed to be considered to be bonded through the egc of the circuit that serves the appliance BUT I have had more than one inspector require me to bond the grounding electrode system to the piping including one that required a bonding jumper around any meter or pressure regulator.

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Old 01-18-2011, 11:23 PM   #3
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LP Gas line bonding


Your yellow flexible piping is called CSST and is required to be bonded by the manufacturer due to its tendency to have small holes blown out of the thin side wall from indirect lightning strikes. This article should sum it up for you.

http://www.toolbase.org/pdf/techinv/...ngconcerns.pdf
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Old 01-19-2011, 08:21 AM   #4
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Stubbie, very interesting reading. Thanks for the link.
NFGC and the NEC have separate interests in this area so I guess the best thing is to talk to my electrical inspector and find out what he expects.
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Old 01-19-2011, 08:41 AM   #5
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Originally Posted by a7ecorsair View Post
Stubbie, very interesting reading. Thanks for the link.
NFGC and the NEC have separate interests in this area so I guess the best thing is to talk to my electrical inspector and find out what he expects.
HHmm, not sure where but I think I heard that somewhere.

Gas lines are one area the inspectors around my area seem to not be able to come to a consensus about. I have had totally opposite directives given me in nearly identical situations. I have kind of given up trying to keep ahead of who is going to order what this week so I simple ask the inspector what he is going to require.

I do what I know, or believe to be correct and then add whatever they want. It's easier than arguing about it. The cost to implement whatever they require is generally a minimal cost, relatively speaking, so it isn't that big of a deal.
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Old 01-19-2011, 09:21 AM   #6
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LP Gas line bonding


It almost looks to me like the person who installs the CSST should do the bonding....
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Old 01-19-2011, 09:36 AM   #7
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I found the answer in MN builing codes not the electrical codes
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Old 01-19-2011, 10:21 AM   #8
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Originally Posted by a7ecorsair View Post
It almost looks to me like the person who installs the CSST should do the bonding....
I'm not sure I want the plumber trying to figure out bonding but I understand where your coming from. Personally I just would not use the stuff, ease of installation is one thing but I don't like the idea of pin holes in my gas piping and then trust bonding to prevent that from happening with lightning strikes. My experience with lightning is it seems to have a mind of its own regardless of what us mortal humans seem to think.

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