Property management called about a gas leak in the csst piping. there was no bonding and lighting punctuured a hole in the pipe. Now they want it bonded. It is a pool house feeding a boiler for the pool heater. Does my #6 need to go back to the service in the main building or can I take it to the 200amp sub in the basement? I don't know if the sub panel has a ground rod. Thanks.
Here in NJ you have to take a ground clamp on the customer side of the gas pipe back to the grounding electrode of the electrical service. That means to me, you can connect to the #4 cu wire at the ground rod, or hit the inter-system grounding point of the electrical service. I believe there are a few more options, but these are the easiest to follow.