Thanks to all.
Evad, yes I did check with a DMM. It was 240V.
I will be there later this week and will have the chance Saturday to spend a little time tracing it out. Scott35 and Redsy, I'll report back on the transformer setup.
This whole factory complex is slated to be razed in about a year, so there's no reason to fix it--I just want to understand it!
BTW, one part of this complex has some cold storage warehouses that are still active. I'll see if I can get some shots of the motors running the ammonia compressors--beautiful late 1940s art deco GE units, running on 2kV. Also the old PBX switch--old 1A2 system in a cabinet 7 ft high, 12 feet long, three feet deep; dozens of step-by-step relays and miles of neatly dressed wires!
Best reagrds,
Cliff
