Hey guys, hope I didn't upset anyone! Thanks for the answers

The closest thing I could relate it to in Australia is some times we have centre tapped control transformers that come out with 2 55v legs and one 0v in the centre (I would assume both 55's are out by 120 )
This gives us 110v between them , but generally we make one 55 leg the neutral and earth it as other wise we have a 'live' neutral of 55v all the time

this picture is similar to a question I am trying to answer, if it makes it easier to understand .....so will both formulas work?
I got 4.7A using the 3 phase formula
(don't have a scientific calculator on me right now to work out the other!!)
[Linked Image from img.photobucket.com]


[This message has been edited by Sparkee (edited 03-11-2006).]

[This message has been edited by Sparkee (edited 03-11-2006).]