electro-Physics: 17.3409 volts

[William Donzelli]

>  >> Old elevators. Lots of old elevators.
> 
>  Patrick> And, lots of not-so-old elevators. 
> 
> Some machine tools, too.
> 
> I remember seeing a large planer -- 12 foot stroke, roughly -- that
> used a DC motor for the bed drive.  The idea was that you would get
> the back & forth motion of the bed by throwing the motor from forward
> into reverse or vice versa at each stroke endpoint.

I think the original question concerned devices that were originally made
to hook up to the DC grid.

Many old DC elevators still in use were upgraded with motor-generator sets
years ago, but as designed, they were just "plugged-in to the DC outlet".

Yes, there is such a thing - it looks very odd. The old elevators,
however, did not have them. They were generally hard wired with a
disconnect, like most large AC machines these days.

William Donzelli
aw288 at osfn.org