Salon master Artist supply

[ses]

I have been asked to install a supply for the above which has 3 4kw imersion heater elements and needs 3 x 20amp supplies.

The salon has a 3 phase supply but am i right in thinking that the supplies to imersion heaters need to be all fed from the same phase?

My thinking being that if they all share one tank full of water if fed from 2 different phases they would go bang if turned on together by shorting across the phases? Or not?

 

[UNG]

Don't see why it cannot be fed with a three phase supply as you can get three phase immersion heaters