Here Goes Nothing...

[plugwash]

split phase is mainly used where three phase isn't practical (usually due to only wanting to run two HV wires rather than 3) but you wan't quite a lot of power.

its much easier to make a cable with 3 active conductors of which any single conductor will have a max of say 200A and a maximum total of 400A than a cable with two active conductors capable of carrying 400A each.

 

[supersparks]

im sure i already answered why they use split phase

 

[plugwash]

450v /3 = 150v
150 x 1.73 = 259.5v

being that 1.73 is the square root of 3

Is that what you were saying???

the phase-phase voltage is always

times the phase-neutral voltage

so the phase-neutral voltage is the phase-phase voltage devided by

don't you even know that to reverse multiplication you use division?!

 

[mapj1]

Supply two houses with the same cable thickness as one.

 

[Lectrician]

Or a row of houses in the sticks.