i dunno, but i hunted this down:

first see Nameplate Data Key:
http://www.grainger.com/Grainger/sta...ptdatakey.html

for more of a menu of motor types,explore the ac and dc link from:
http://www.grainger.com/Grainger/wwg...tml?type=motor

with more at:
http://www.lmphotonics.com/vsd/vsd_01.htm

and
http://en.wikipedia.org/wiki/Adjusta...speed_d rives


dean wrote:
And is there a way that I can tell just by looking at the motor in a
shop?

Thanks

Dean