Yeah there are two different sized apartments for this project.This took longer than I thought it would. I kept wondering why we were upsizing one of the sets of feeders to 125 amps, and I couldn't understand.
Bingo! NEC 250.24(A)(1)Sorry, I didn't finish my thought. NEC 250.24(A) requires the grounding electrode conductor to be connected to the grounded service conductor at the service, not in a sub-panel.