Even today, older cities have multiple skyscrapers that generate their own, unique form of electricity .... some even DC. And, no, there is not any 'normal' 120 available in these buildings, even today; I've had at least one service request from such a building.
How do places like that deal with equipment procurement? Surely they can't all have it custom-built, or keep repairing stuff from way back when. And, what about computers and the like? Local xfmrs at each workstation?
