Gas line grounding?

[d.mcfarland]

Probably looking for an electrician to answer, but anyone can probably confirm with their own setup.

I don't have a connection (bonding wire) from the metal gas line to any electrical ground.

Is it required to make an independent connection instead of just the (hopeful) 120v metallic box connected to the furnace?

 

[mm08822]

Metal systems are required to be bonded, i.e.....bonded to ground.
However there are different various requirements from utilities and even local inspectors.
Some say, no bonding required, others say the appliance cord performs the bond.

CSST requires bonding per mfr instructions using their approved bonding manifold.

Black pipe all by itself is pretty robust for continuity. One or more appliances connected to it is adequate.

 

[d.mcfarland]

Black pipe all by itself is pretty robust for continuity. One or more appliances connected to it is adequate.

So in your opinion a bonded connection from the copper water lines to the black pipe gas line is not needed?

 

[wyliesdiesels]

So in your opinion a bonded connection from the copper water lines to the black pipe gas line is not needed?

gas and water lines should be bonded

how that is accomplished varies

water lines dont have appliances that would establish this bond so they need that bond wire

gas lines on the other-hand can get bonded thru the cord and plug connection of an appliance such as a range or oven as said above by mm08822

how about giving us a bit more detail about what you currently have for bonding of these lines.

Is this propane or natural gas service?

 

[no704]

Setting up a shop I used to run the electrician ran everything and had the gas lines bonded with everything el e. Inspector failed it. Sparky was pissed as it was correct. Removeed bonding from gas lines to make the inspector happy, and put them back as soon as he left.

 

[d.mcfarland]

how about giving us a bit more detail about what you currently have for bonding of these lines.

Natural gas in old black pipe. Only thing it powers is the furnace. Might add a stove/oven as well.

Only bonding is the hot and cold water lines currently.

 

[bluedog225]

Curious why it matters Nat gas vs. propane.

having all metal stuff bonded seems like the right answer. That is, I can’t think of why it’s ever going to hurt you.

And I’m putting in a propane tank this file so I’d like to know.

 

[wyliesdiesels]

Setting up a shop I used to run the electrician ran everything and had the gas lines bonded with everything el e. Inspector failed it. Sparky was pissed as it was correct. Removed bonding from gas lines to make the inspector happy, and put them back as soon as he left.

shouldve asked the inspector for the code reference. bet he had no leg to stand on

 

[wyliesdiesels]

Natural gas in old black pipe. Only thing it powers is the furnace. Might add a stove/oven as well.

Only bonding is the hot and cold water lines currently.

I dont like the idea of bonding thru the flexible metal gas lines so i always just bond the iron pipe.

 

[dscheidt]

I dont like the idea of bonding thru the flexible metal gas lines so i always just bond the iron pipe.

Lots of stuff is hard piped here. (No earthquakes…), so the hvac is probably what’s used for bonding.

 

[no704]

shouldve asked the inspector for the code reference. bet he had no leg to stand on

Wasn’t my call. Little dude with a napolian complex. He was going to make us elevate all the transformers having to pull all new HV lines at serious expense.

 

[mm08822]

So in your opinion a bonded connection from the copper water lines to the black pipe gas line is not needed?

The copper water pipe can be compromised with pex during a repair or modification. The best way is to run the bonding wire for each metallic system back to the electrical panel. This minimizes so many dependencies, either existing or future mods.

If your wiring to the appliance is properly installed and not damaged, then it is probably good enough.

You can always add a bonding wire between the panel and piping system if you want.

 

[Dagny]

All of our propane and propane accessories companies install a dielectric union between the copper underground and the regulator. I believe this is wrong and know of two fires started because of it. Both from lightning strikes. I wasted much time back in the yellow sst days it seems they have corrected the yellow stuff with a braided covering but outside under the ground is a long piece of ungrounded copper pipe leading to a gas tank and quite often located under a large tree.