Bonding Structural Metal to Feeder Panel??

[jclint07]

Hope everyone had a great Thanksgiving!

Scenario- 10,000 square foot metal building with (6) commercial tenant spaces divided up inside. Each tenant space has a 200A Feeder Panel, with seperate equipment grounding conductor sized & installed properly.

Is bonding to the building steel NOT required at any of the (6) Feeder panels, if bonding to the structural steel was done at service equipment (250.104 C)?

 

[pete m.]

If the bonding to the steel was already accomplished at the service equipment then I know of no reason to bond it again at the feeder panel locations.

Pete

 

[jclint07]

I've come across installations where it has been both ways. Metal structure bonded once at service equipment AND bonded again at each seperate feeder panel, which I assume the "more the merrier".

So as long as EACH of these feeder panelboards contain a seperate equipment grounding conductor, bonded to it's enclosure, no additional bonding to pipes, structural steel, gas lines, etc is required, but is allowed correct?

 

[Cow]

Sure, you can do it.