ECN Forum Forums General Topics of the Trade General Discussion Area to bond or not to bond?

According to Art. 250.104(b), as several of you have stated, the gas pipe is required to be bonded, however, the equipment grounding conductor can be used for this purpose.


That is how I've always understood it. Whether the furnace/ boiler is wired in E.M.T. or MC cable, the EGC is sufficient to bond the gas piping in the house.

In BC, we must bond the gas line.

A few years back I was installing a service on a new mobile home. The gas company had installed their line (metal) from the street, and capped it off without a meter. The gas installer hadn't yet run the pipe out from the furnace. Rather than making a 2nd trip back to bond the inside gas line, I decided to bond the incoming line from the street....ended up getting an irate call from a foreman at the gas company saying it was a big NO NO to bond their line as they run a small current through their old metal lines for corrosion. The meter has an isolation point so by bonding on the "load" side of the gas meter, the bond is isolated from the "line" side.