Sizing a generator

[Kopper]

When sizing a generator must equipment that is started manually be used to determine the size of the generator as indicated by 702.4(B)(2)(a)&(b) The standby source shall be capable of supplying the full load that is transferred by the automatic transfer equipment. Article (b) continues and says this: Where a system is employed that will automatically manage the connected load, the standby source shall have a capacity sufficient to supply the maximum load that will be connected to the load management system. or can that equipment be left out of the sizing equation as it will not start automatically?

 

[kingpb]

All loads that will be connected to the generator, whether automatically transferred or manually added needs to be considered in the generator load sequencing.

 

[JoeStillman]

If by "manually started" you mean magnetic contactors with stop/start buttons, then I would say it's ok to take each load as its own step. You won't have a person standing by each starter waiting to start them all at the same moment. The "automatic management of the connected load" in this case is done by the sealing contacts of the starters that are in parallel with the start buttons.

If they are H-O-A switches or some other kind of manual starter though, they will all try to come on at once when the ATS throws to generator and you should take them all as one step in the gen sizing.