gas line spark

[djr363]

while removeing a gas union from a furnace, there was a spark (the gas was off), what is the cause of this

 

[bob]

Re: gas line spark

The gas pipe is either making contact with the water pipe or it has intentionally been bonded to the water pipe and is acting as a return path for current.

 

[ramsy]

Re: gas line spark

Bootleg/false grounds, (Tiing G-N) at appliance electrical outlets, can also provide objectionable-neutral current paths along anything connected to the case or frame of the appliance, including water, gas lines, or people, if those lines make contact with main bondings or earth.

 

[mark480]

Re: gas line spark

Bob, your comment is the reason why many electricians are uncomfortable with bonding the gas line to the grounding electrical conductor or water pipe, article 250.104 I am not disagreeing with you, I find that electricians have different opinions on this sub. I would like all of yours .thanks