ECN Forum Forums Code Related Discussion NEC & other Code issues Bonding Metal Piping 250.104 (B)

Hi,
I am looking for the requirement for bonding the copper water lines to and from a hot water heater to the main disco, and the bonding required for gas lines..I also have sprinkler lines.

250.104 (B) seems to cover some of this but I recall my inspector making me bond to both copper lines from the water heater and then a bond to the gas meter piping..

thanks

greg

I have had this discussion many times and it has been pointed out, the code does not specifically require a bond around the water heater or any other non-conductive fixture.
You can get there with the word "systems" by saying all of the pipe in the system needs to be bonded using the jumpers defined in 250.104 but you still have guys arguing the other side.

Greg,

We are having the big big fight again about bonding gas pipe or not bonding gas pipes here in NJ. The National Fuel Code (which is adopted here) states that the gas line must be bonded. I don't have the exact words nearby but, we are suppose to run a bonding conductor from the customer side of the gas line/meter to the grounding electrode of the electrical system. (The ground rods.)

I don't see much gas here. I am not sure what they are doing but I am for bonding everything metal.
I bonded my stainless counter top and the back splash.

I hear some interesting theories on bonding

The main thing is, not every groundING conductor goes without passing some current

So you bond the gas pipes, and say they land the gas bottle (think rural area) in proximity to your meter & mbj

Methinks you fellas can visualize the circuit .....

~S~

Any piece of metal connected to the electrical system, intentionally or unintentionally, will carry some current.
There is no way to stop it.

Sparky,

We had a problem with voltage getting on to gas piping several years ago in one of my towns. The gas co. was there to change out the meter and when the tech open up the gas pipe, there was a spark. The tech went nuts and blew the whistle. There were police, and fire dept. and utility people all around the area in minutes.

I think the problem was the neutral broke loose. There were no ground rods, the city water ground clamp was either bad, loose, or missing, so the ground was carrying the neutral load, right back on the gas piping system.

There is discussions around this area with bonding of CSST piping. CSST is Corrugated Stainless Steel Pipe, it is that flex yellow pipe or trac (track) pipe which is black colored. Some people think it has to be bonded at the fittings and some don't. Some also think the bond wire should parallel the CSST and some say no it doesn't.

yeah i know Greg

the poco guys tell me the closer i am to a substation, the more i can expect it too....

~S~

Oh great....

and i can just image them all pointing to me

"there he is!, git 'em "

~S~