From: arl_123234@hotmail.com   
      
   Hello, all.  As most portable consumer-grade AC generators don't have   
   their grounds (frame and ground prongs on their mounted AC outlets)   
   bonded to their neutrals, I was wondering what useful function having a   
   3-prong U-ground outlet on the genset performs (other than mating with   
   appliance and extension cords).  In a residence having the neutrals and   
   green (grounding) wires connected together at the service entrance   
   ensures that hot wire-to-exposed metal frame appliance faults (assuming   
   appliance is using a 3-wire cord) will trip the appropriate panel   
   breaker/fuse.  This would not appear to be the case when using the   
   portable generator.  I'm only assuming that the generator is servicing   
   3-wire plugged-in appliances.  I don't think it's a shock issue outdoors   
   if a hot-to-ground fault in the appliance occurs, it may continue to   
   function normally until it's subsequently plugged into a   
   residential/commercial AC power outlet.   
      
   Of course the equivalent action in the residence could be had by bonding   
   the generator's neutral to its frame ground.  Your time and comment is   
   greatly appreciated.  Sincerely,   
      
   --   
   J. B. Wood	            e-mail: arl_123234@hotmail.com   
      
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