Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com> > The two phases TWO phases? > in the standard utility 3 phase Y system are 120 degrees apart. The > two phases in the standard utility delta system are 60 degrees apart. 3 phase Delta is 120 degrees, just as Y. (They can be interconnected with transformers). best dwp