gas line grounding

[afwagner]

Is it ever safe to bond a gas line to the disc. on the outside of a structure .
i have an inspector that wants it bonded for no other reason than " thats what i want".

 

[infinity]

Around here we are not required to provide a separate connection to the gas line. The gas line is bonded through the EGC in the circuit feeding the gas appliance. Nothing further is required.

And as far as having it on the outside, I would ask for a code reference. I'm sure he won't find one.

 

[LarryFine]

i have an inspector that wants it bonded for no other reason than " thats what i want".

Ask him to repeat that to his boss when you refuse.

 

[augie47]

possibly a courtesy call

possibly a courtesy call

often times, in this area, the inspectors will ask for certain grounding/bonding connections to be made at specific loactions when possible (in the event of a gas water heater, the local inspectors prefer a hot/cold/gas bond at the water heater). Normally their request is honored as a courtesy as it aids them in locating the bonding means and often makes little difference to the electrician.

 

[afwagner]

thanks guys

afwagner

 

[chris kennedy]

inspectors prefer a hot/cold/gas bond at the water heater.

Never understood bonding the hot water pipe. It expands then contracts over and over. How well does that clamp stay in contact with the pipe?

 

[stickboy1375]

Never understood bonding the hot water pipe. It expands then contracts over and over. How well does that clamp stay in contact with the pipe?

How big do you think it expands? I've never seen one fall off... :grin:

 

[chris kennedy]

How big do you think it expands? I've never seen one fall off... :grin:

Very good sir,

I have seen the hot water clamp get so loose that nothing more than a sudden burst of gravity will make it fall off.

 

[augie47]

a WHAT ?

a WHAT ?

Very good sir,

I have seen the hot water clamp get so loose that nothing more than a sudden burst of gravity will make it fall off.

what type of instrument would one use to measure the intensity of a "burst of gravity" ??:grin:

 

[chris kennedy]

what type of instrument would one use to measure the intensity of a "burst of gravity" ??:grin:

I measure the bumps on my head.

 

[nakulak]

250.52 B 1 prohibits using metal underground gas lines as grounding electrode. However, 250.104 B says that gas piping attached to a structure that is likely to become energized must be bonded.

We always bond the gas pipes at hvac units and generally (in our area) that is all that's required.
(I've spent time thinking about it and I'm still not sure its a good idea - it just seems that its an invitation for fault current or lightning to energize the gas pipe, but that's jmo !)

 

[stickboy1375]

250.52 B 1 prohibits using metal underground gas lines as grounding electrode. However, 250.104 B says that gas piping attached to a structure that is likely to become energized must be bonded.

We always bond the gas pipes at hvac units and generally (in our area) that is all that's required.

So do I, but only by the EGC for the circuit that may energize the piping.

 

[Cavie]

If you have flexible gas piping involved, you must bond with #6 cu as per manufacturers install instructions.

 

[stickboy1375]

If you have flexible gas piping involved, you must bond with #6 cu as per manufacturers install instructions.

Not really, I didn't install the product, sounds like the guy that installed the product needs to hire someone to bond the #6 as per that products instructions...

 

[stalllingselectric]

I have had an inspector ask me to bond tracpipe and Wardflex pipe , problem i had is finding a fitting and being careful to keep from collapsing the pipe

 

[infinity]

I measure the bumps on my head.

Are you a Phrenologist?

 

[ptonsparky]

I have had an inspector ask me to bond tracpipe and Wardflex pipe , problem i had is finding a fitting and being careful to keep from collapsing the pipe

Do not bond directly to that type of pipe. Use a water pipe ground clamp to the brass fitting or the rigid gas line. It is should be #6 cu and near the point of entrance to the building.

Bonding all the piping systems as required reduces touch potential and if you are in a wet crawl space under a mobile home with an unbonded energized ____ line, your heirs won't really care how lightning affects it.

 

[Dennis Alwon]

If you have flexible gas piping involved, you must bond with #6 cu as per manufacturers install instructions.

Not all manufacturers require #6. Some require the bond to be based on service size (Table 250.66).

 

[ryan_618]

Are you a Phrenologist?

 

[haskindm]

250.52 B 1 prohibits using metal underground gas lines as grounding electrode. However, 250.104 B says that gas piping attached to a structure that is likely to become energized must be bonded.

We always bond the gas pipes at hvac units and generally (in our area) that is all that's required.
(I've spent time thinking about it and I'm still not sure its a good idea - it just seems that its an invitation for fault current or lightning to energize the gas pipe, but that's jmo !)

If the gas line is not bonded and becomes energized, how would the fault be cleared? Forget the fact that this conductive material (gas line) is filled with gas, and imagine it is a waterline. Would you want to bond to it to clear a fault? I believe it is much more dangerous to have an energized pipe with no way to clear the fault than the possibility that this pipe may carry current during a nearby lightning strike. I was called out to check a house one time where the owners were receiving a shock whenever they touched a faucet. Turns out that the Water Heater was faulted (fed with 2-wire romex) and the waterline was NOT bonded. The waterline was energized with no way to clear the fault. Owners became grounding conductors when touching the faucet! Not good....