Overall Diversity in huge commercial kitchen

I do not think that there is a simple answer to this, it depends on the type of appliances and the expected pattern of use.

A total supply of 315 amps strongly suggests three phase as single phase supplies that big are rare. Is the connected load 300 amps per phase, or 300 amps single phase. An induction cook top often has a similar loading to radiant rings, but the AVERAGE  of several induction cookers will tend to be less as they heat so quickly and therefore run for a shorter time.

A fast food takeaway could if busy have numerous heavy loading appliances in almost continuous use, in which case allowing 75% of the connected load might be prudent.

A table service restaurant with each meal cooked to order might have a more moderate actual loading. Consider as an example, table 6 order four main meals of say steaks and vegetables. The peak loading of a grill and say six boiling rings can be considerable, but is unlikely to be continuous.

The next table might not order for some minutes. And even if a coach party arrive, are there enough waiters to take two dozen meal orders at once, and enough cooks to prepare many meals at the same time. Probably not, in which case allowing say 50% of the connected load should be ample.

Thanks

Its obviously not an easy and simple answer...I know this

That is why I laid it out to a community of engineers & technically capable people who may have enountered similar situations in the past

I just digged into the on site guide diversity tables and although there is no similar example in there, i found one that is for a small hotel kitchen which uses 100% of the biggest load + 80% of the second biggest + 60% of the rest

Using this rule the 300A were diversified to 200A approx which is 67% diversity

Cheers

Thanks

Its obviously not an easy and simple answer...I know this

That is why I laid it out to a community of engineers & technically capable people who may have enountered similar situations in the past

I just digged into the on site guide diversity tables and although there is no similar example in there, i found one that is for a small hotel kitchen which uses 100% of the biggest load + 80% of the second biggest + 60% of the rest

Using this rule the 300A were diversified to 200A approx which is 67% diversity

Cheers