While it doesn't excuse the original crappy work, I can nearly guarantee that most of the mess here was caused by a re-roof job. Nobody called an electrician to get conduits out of the way and then reinstall them. I see it all the time.
Greg, that's not a bad guess...but the truth of the matter is that this resturaunt- once notorious in this town for mixing dog food in its' dishes....grew from a small house to a thriving business, with many additions along the way. The wiring you see was all done, as you see it, by the HVAC/ refrigeration guy. What sleepers you see are glued in place, left from a prior install, and not used when the lines were run again.