As I'm reading all these very interesting replies, I'm remembering a studio I'm associated with that did an expansion earlier this year, prior to my going there to work on a project
I was having a very $$$ compressor I'd just purchased shipped direct to the studio from the dealer for use on the project...
Then the studio owner told me of the troubles they were having with the equip in the new control room: weird behavior, etc. etc.
After some investigation, turned out their electrician had wired the room's A.C. outlets for the gear INTO THE LIGHT DIMMERS
I got off the phone and had the shipment re-directed to my home base; I could only imagine what other wiring "surprises" were waiting for my new comp to be plugged into