I have a service with 20 elevators, HVAC motor loads, lighting, and general receptacles. I find it unlikely that all elevators will operate simultaneously. Given this, can NEC section 220-21 be applied to the elevators for sizing the main service OCPD? As a basis, I would like to use the factors given in table 620-14? I know this table is allowed for feeders, but could it be used as a basis for a diversity factor for sizing the service OCPD?