Question? There is a 200 amp 240/120 volt single phase service.
This is an exsiting service on a small restaurant. Existing service has an A/C unit and Air Handler with Heat strips. 2 light circuits and 1 Rec. circuit with 4 outlets on it. 1 sign circuit.
How do I come up with the existing load calcuation for the service? And have to add additional another ac unit, air handler, HWH, 15 kitchen circuits and general recs and lighting etc.

What method do I use to get the existing load and what calcuation in the code do I use to determine to new service size?

Thanks,