Generator Building Grounding

[Jennie1220]

I have a question about grounding a second building.

The first building contains:
-Meter and CT Cabinet
- A 480v EBU (enclosed circuit breaker)
-An ATS switch
-480v panel (this panel feeds the 480v panel in the second building)
-Transformer
-120v panel

The second building (30' away) contains:
-Generator
-480v panel
-Transformer
-120v panel

To me both buildings need their own grounding electrode because of 250.32(A). But that is not how the engineer has it on the plans. According to the drawing the only grounding electrode is off the ECB. What am I missing?

Thanks for the help

 

[W@ttson]

I would say the second building needs its own GES based on 250.32. As said elsewhere in this forum, the ground electrodes at the second building are for lightning, surges, and similar events.

 

[Jennie1220]

I would say the second building needs its own GES based on 250.32. As said elsewhere in this forum, the ground electrodes at the second building are for lightning, surges, and similar events.

Just not sure why the engineer didn't draw it that way.