I picked up some work for a local fireplace store bonding the gas lines on installation. They have been installing them for years but only recently failed for a missing gas bond to the black pipe. I had already done several bonds for the tract pipe but apparently they had no idea that a bond is required for the black pipe. It actually works out good, now they call me on every installation to do the bond.
The black pipe can be bonded anywhere on the pipe. It may be at the service, furnace, water heater, crawl space, attic, etc. Is there a way to check for bonding that is not easily visible. Can I do a simple continuity test, hot to ground? If the pipe runs against something that is grounded, the meter would show ground but it is not truly bonded. It would still be a permit and a service call, but would save the work.
How are these fire places operated? Where/what is the final gas connection? What is the final gas termination?
If any of these items are cord and plug connected,then they are bonded thru the EGC. If they are hard piped into a unit,that is hard wired IE: furnace,boiler etc..They are bonded thru the EGC or the water piping.
I see no need nor does the code making panel for additional bonding.
I believe he ids talking about bonding the yellow flex pipe to the black pipe. If you are connecting this to the grounding electrode it is no longer a bond but a ground. This is a violation in most gas companies eyes. The do not want any of there piping carrying stray voltage to ground. Aloose connection gets moved and boooom!
Is there a way to check for bonding that is not easily visible. Can I do a simple continuity test, hot to ground? If the pipe runs against something that is grounded, the meter would show ground but it is not truly bonded.
If you do a simple continuity check it will probably read that is connected to a grounded body. However, it may be just TOUCHING the water pipe. The easiest way which i am sure you already know, is connect the cold/gas/hot pipes at the water heater which can be visually verified.
Some of local AHJ require bonding of the gas pipe with at least a #6.