I agree with reno, it sure looks like each phase has it's own private conduit!!
Too bad such clean workmanship is fouled up by such an error!
As for the AHJ missing it, it's not impossible. As was explained to me, the AHJ (intentionally or otherwise) will tend to make the depth of his/her inspection based on the workmanship of the site. Really neat work would tend to get an inspection not subject to the "fine-tooth comb." Not-so-neat work would make for a deeper inspection to see if there are issues hidden within. Still, one would hope the AHJ in this case is aware of a little thing called induced current!
Gregg, I too am wondering how you could possible correct this and keep the site on-line. When you figure it out, please share (and maybe post "after" pics?)
My original thought was to correct the genny side first, transfer to genny power then fix the utility side. But one small (sarcastic)
flaw with my idea is that the load side connections left alone would make for a phase-to-phase short if left as-is? And of course, how would you correct the load side if it had to stay fed? Hmmmm...
How about making temp hook-up directly from utility side to switchgear, (at 1600 amps no small feat), correcting the transfer switch then re connecting?
Wow. Now I remember why I stick with cinema stuff.