Kva 3phase demand calc

[bigspark17]

Hello all, looking for a bit of advice not been asked to fill in a new power supply for dno for a commercial premesis before. Do i put 70kva for a 3 phase supply that equates to 100A 3 phase head?
Usually on single phase i put 18.4kva for 80 supply and they always provide 100A head.
Thanks in advance

 

[BXB]

That should be fine to put down if you are after a 100A 3 phase head. When I deal with WPD a 100A 3p supply is normally referred to by them as 69kVA supply (sometimes 70kVA depending on who I talk to).