On October 31, THETechnoid(a)home.com wrote:
  Last weekend I aquired a system/36 model 5360.  Have
not powered it as
 yet.  The plug does not fit either of my dryer sockets but is marked
 250vac, 20amp.  Is this a three-phase machine?  If so I think I am in
 trouble..... ;-) 
  Does the plug have three prongs or four?
            -Dave McGuire