Hi @oduday can you elaborate how you would calculate demand per phase?
Making some assumptions to try to understand... and you can point to the error in my understanding:
As an example, if the connected receptacle load is
Phase A: 11kVA
Phase B: 10kVA
Phase C: 9kVA
Total: 30kVA
Referring to the OOTB demand factors (100% of the first 10KVA, 50% of the remaining), the resulting demand per phase would be:
Phase A: 10.5 kVA
Phase B: 10 kVA
Phase C: 9 kVA
Total: 29.5 kVA
However, looking at the panel in aggregate, the demand ends up being 20kVA (100% * 10kVA + 50% * 20kVA)... so the demand load and current is about 2/3 the connected vs. looking at the phases individually. However, one can't simply take such a factor (the 2/3) and apply to each phase because someone could do this:
Phase A: 15kVA
Phase B: 15kVA
Phase C: 0 kVA
Resulting Demand:
Phase A: 12.5kVA
Phase B: 12.5kVA
Phase C: 0 kVA
Total: 25kVA
The above 2nd scenario likely bad design, and computing the load per phase isn't going to solve that for you.. but something else helping you see the total load balance per load classification might (?).
Perhaps it isn't receptacles primarily that you have concern about... whatever additional info/example you can provide can help us understand more about this request.