In all cases, sized for the respective load as calculated in Article 220. Your query almost makes me believe you think that the feeder and service are connected together. In case that is what you think we are saying, we are not. Loads are kept separate. You'd have feeder loads and you'd have service loads.
know I do not think that the loads are connected together I see clearly that the KV is being distributed through two separate supplies.
What I am exploring is this.
If the same building is supplied by a feeder only you calculate the load based on 220 you come up with a min. conductor size.
If you supply the building with a service you calculate the size of the service conductors. based on 220
if by design choice you supply this building using this feeder and service concept, looking at new construction first.
Are you saying that the service calculations only have to include the article 220 loads supplied through the service and you can exclude the article 220 loads supplied by the feeder in the service calculations. If so where do I go to in article 230 to find that provision?
And also if by design choice I supply the building with a service and a feeder and calculate the feeder size, can I exclude the load supplied by the service from the feeder calculations and if so where in article 215 do I go to find this provision