3 Phase in the kitchen??

Hi
A little advice appriecated
I have a induction hotplate I am going to install in my new kitchen, it comes configured for a single phase 45 amp supply but has an option for it to be connected 3 phase 240 volt. I would preferr to have it as a 3 phase connection as this will better distribute the load across the supply rather than wacking 45 amps on one phase.
Anybody know of any reason/regulation (in WA) why I shouldn't do it this way , 4core and earth 2.5 orange circular and it's own 20amp 3 phase breaker should do th e job

Cheers


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