ECN Forum Forums General Topics of the Trade General Discussion Area Bonding galvanized gas lines inside a house

~s~:

Nice shirt!!

further on that Hotone, is that i've noted a number of gas line installs where the CSST is broken by iron pipe T's

so my Q would be, do these iron T's get bonded as well here?

if so, i do believe said bond would need to be accessible

so there's another potential problem (if bonding required) for say, closing up a job where the bonds may be

~S~

~s~:
AS per NEC, as I understand, The 'bonding' is thru the electrical appliances that the gas piping is connected to.

Based on that, the 'bond' throughout the piping system should be mechanically continuous, unless there are and non-metalic joints/connections/fittings. Agree??

well i'm confused Hotone

does the flex constitute mechanically continuos here?

~S~

As I mentioned confusion abounds.
The bond for the CSST at the point nearest entry into the building is for lightning.
The grounded wire to any gas appliance that also has electric, for motors, igniters, etc. provides the required bond for NEC purposes.
Bits or pieces of metal piping in the gas system, Tees, manifolds, fittings do not constitute a piping system and do not need to be bonded.
Usually the gas piping outside the building is not metal. That is another reason for not using the gas line as a grounding electrode.
Remember the CSST bond is for lightning, which can travel through the earth regardless of any metal pipe path.
Note; I was registered years ago, but re-registered when I changed computers.
Alan N. CEI-M # 138

Thanks Al

That clears it up for me

~S~

You also need to remember the "likely to become energized" language in 250.104(B). An isolated section of metal pipe that is nowhere near a source of electricity is not likely to become energized. That is where the AHJ ends up making the final call. It might be nice if there was more guidance on this but the NEC is the size of a small city phone book now

OK, now I'm going to be confused like Sparky...
Lightning is one of the 'un-addressed' issues in my area of NJ. No, we are not 'lightning free', yes we do have thunderstorm activity, but it's kind of a back burner thing I guess.

The CSST IMHO has it's bonding per the DCA note above.

Last plac I remember seeing any kind of lightning protection was at two country clubs I worked at.

That is one thing about living in Florida. We are very aware of wind, water and lightning. It does take a lot of the mystery out of how folks up north have so much damage from a "freak" storm that is a regular occurrence here.
Lightning protection is not really that tough and you can survive direct hits, no matter what the urban legend says. The trick is directing all of that energy into the ground and stopping the shot going toward the house. A gas line is a particularly scary thing if it arcs across a section of plastic. That becomes a BIC lighter with an unlimited gas supply. You certainly want a bond where it enters the house and I would drive a rod there, even if it was just one of those 4' telco rods if I didn't have a pretty good length of metal pipe in the ground. ... but that is just me.

John,

One of the town halls I work at has the lightning arrestor system through out all of the buildings. Here in NJ that inspection ( believe it or not) falls under the Building inspector. I watch the system as they go in and make sure they get the certification for the whole system. I have seen some strange things with lightning. I seen where a bolt of lightning went through the side of an old stucco house and hit an old shotgun laying in the attic. That was all nothing else happened. (Beside the small hole in the stucco where the bolt entered.)