Eigenvector posted for all of us...
I don't top post - see either inline or at bottom.

I asked that very same question to the people I shoot with at the range -
all of them either are instructors for gas service or perform field repair
services for the gas company. Every single one, all 3 of them, said "DON'T
DO IT!!!!" shortly followed up by "Mind if we come by this week to INSPECT
your service??"

The gas company protects its own piping, if you must use ground wires to
plumbing - use your cold water tap. Better yet save your pennies like I am
and get grounded service. If I keep saving my extra money I might be able
to afford it within the next 20 years - but's that's only if everything else
in my life goes perfectly.

Hey, good luck!!!!
--
Tekkie