Quote:
Originally Posted by Lightning
The lightning system was grounded to the gas lines in two places - on the attic manifold and on the homeowner's side of the exterior gas meter.
|
In the United Sates, nothing must be grounded to a pipe. Grounding to a cold water pipe is insufficient and now dangerous grounding - a code violation. Ground connections to gas pipes (to remove a fault current) vary with each gas company.
Pipes connect to single point earth ground (a dedicated wires) to 'remove' current from that pipe. So that current faulted into a pipe has a safer, more conductive, and dedicated connection to safety ground.
And yes, I said safety ground; not the other (earth) ground.