> Can't remember the reason why, but the voltage between 
>2 phases (RMS Value) is the single phase RMS value * 1.732

Wether it is star or delta connection, the voltage between 
any two phases will be Vrms(Sin(a) + Sin(a + (2pi/3))) 
which would look to come out to about 1.732 when a = pi/2 
(i.e. Sin(a) = 1).
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