Hi Joe
I realize that you are trying to be helpful, but I dont want to study motors in general. I would like to get Data, or some technical information that defines the reason that 3 phase motors can deliver only 2/3 their name plate rated HP. As you might have noted, I have conducted a rather extensive project here to measure and record HP delivered by 3 phase motors connected to single phase. Since my data shows that there is no justification for *me* to state that a 3 phase motor needs to be limited to 2/3 its name plate rating. When guys like Spehor post -- I listen!
Jerry