Can someone please shed some light on Amp requirement for Antminer S9...

From the data provided - for one Antminer S9 the power requirement would be in the region of 5.6 AMP on a 220V supply. Would this requirement of 5.6 AMP decrease if you are running a three phase supply?
Does the three phase make a difference at all or is this supply only relevant to machinery that would utilize and rely on three phase?

Is there any benefit to having three phase?

Struggling to get my head around 5.6AMP supply per rig... For 50 rigs the supply seems huge!

Thanks you for your feedback in advance.