- Placerville, CA, USA
- Retired PV System Designer
Code requires the bonding to both ends of the ferrous conduit for a GEC, which may have to carry lighning related high amplitude, high frequency current without developing a high offset voltage.AFAIK he is correct on needing to bond both ends if it is a ferrous conduit. If you don't it turns into an inductor when carrying current. The idea is to keep impedance as low as possible.
There would also be a problem with unbalanced current carrying wires in a ferrous conduit, but bonding is not an option there.
But the OP is talking about a gas pipe bonding conductor. There is a potential safety issue for lighting induced voltages, but the conductor is not part of the GES, and not covered by the specific Code requirements for a GEC.
The bonding is a good idea, but not required.