Boston Edison used to provide 600 volt DC service for the operation of
> elevators and cranes. I don't know if they still do.
I know Milwaukee, WI had DC available at some point in the distant past. I used to have a water cooler with a DC motor from downtown somewhere.
Upper Michigan had 25Hz (cycles/second at the time) at a number of copper mining operations, if memory serves.
Tom Horne
> "This alternating current stuff is just a fad. It is much too dangerous
> for general use." Thomas Alva Edison
Herb Stein snipped-for-privacy@herbstein.com
[TELECOM Digest Editor's Note: A water cooler with a DC motor is interesting; but did you ever see a _refrigerator_ powered by -gas- rather than -electricity-? I had one of those in a long since for- gotten apartment in Chicago back in the 1960's. No motor of course, no compressor, etc, but it was a refrigerator, freezer, etc, and I think (cannot remember for sure) it was manufactured by 'Frigidaire Company'. Totally silent of course. I have no idea how it worked; if I ever knew, I have since forgotten. PAT]