Bonding a gas pipe outside of a building?

[J.P.]

At high school gym two new A/C, heat units went in for the gymnasium. They ran a whole separate plastic underground line and meter for the units.

The pipe runs along the wall doesn't get close to our electrical pipe and goes into the units we are supplying power to.

Should I bond the gas pipe? It never penetrates the wall. It doesn't cross our elec pipe.

If I do bond it....is the wire sized off the service entrance conductors for the main service ( 500A parallel 250s)? Or will the # 6 equip ground that is in the A/C disconnect ( 125A #1 ) suffice?

It may be a clear cut issue for some of you, but for me I could go three ways........

 

[Dennis Alwon]

Look at 250.104(B) and see if that helps

 

[J.P.]

Pretty clear, I should have looked at the code book. But I left it at the shop and didn't have one handy.

So #6 it is.


Thanks.

 

[K8MHZ]

Just to be clear, is the gas pipe going to be bonded outside and it's certain there is no dielectric union isolating the inside gas pipe from the outside pipe?

 

[J.P.]

This gas line is COMPLETELY separate from the gas in the building. Has it's own meter and everything. I saw them laying the plastic underground from the gas main out by the road.