It seems the broader issue is with gas piping generally, as it may have higher than expected impedance. I note that threaded connections, even with black pipe, are typically treated with (non conductive) sealants.

I've seen at least one gas fire result from a confluence of an ungrounded appliance with a ground fault to black pipe gas connection (IR heating likely damaging thread sealers); another in which fittings merely glowed red from a poor service ground and lost service neutral that resulted in excessive current through gas piping despite bonding.

Both events occurred in aged electrical systems installed under older NEC rules and which, due to ravages of time and poor maintenance, were not as robust as a new installation might be. I imagine that appropriately safe installation of any new product needs to be predicated on the way it might behave in an environment with such older installations, and appreciate the input from a electrical engineering perspective.

My plumber is planning to install a short section of CSST as the particular installation would be difficult otherwise. Since it is in my own home, my plan is to bond the appliance, gas fittings and my copper water line with #6 Cu, all liberally coated with an appropriate antioxidant compound.

Very interesting, we need to find a way to insulate the CSST from the equipment so no current will flow it, The equipment should be allready

Didn't this test also test the black wrapped? If it's the same type of line with a black wrap and a coaxial bond. According to the Texas study it didn't matter I it was yellow or black.

In my area, the practice of using the yellow CSST is no longer approved. Contractors are now using a black jacketed version that according to mfgr specs doesn't need bonding.

Mike,

This article, which I have read several times still doesn't address if grounding the manifold due to the gas system not being bonded to earth (plastic line) would help bleed off the lighting strike. I have seen first hand that lighting jumped into or out of a csst line to a grounded furnace duct and proceeded to catch a joist on fire. I feel with having 38 years of electrical experience that grounding would be better than nothing. I understand the low voltage (120V) studies, but that situation is more rare than the lighting.