Hi,
To the best of my recollection to answer your question. I was called in for a few problems. One was one of the roof fans wasn't working. As you can see from the picture there probably wasn't a lifetime garauntee on that installation. Also one of his fryers was blowing the breaker constantly...turned out to be undersized feed. I believe there were also some overprotected wires in that panel you see.
Besides the obvious stuff this job should have been wired in MC cable to meet local codes for a commercial building. The outdoor awning lighting around the whole building was done in romex.
What also amazed me is the utility actually installed a meter in this place??? The only thing I remember that they got right was they actually installed a GFI receptacle in the bathroom LOL.