I am looking at sizing a whole house generator. My question is. Would I have to include the load for an outbuilding that is used primarily as a work shop, and has a hot tub? (2008 NEC) 702.5(B)The calculations of load on the stand by source shall be made in accordance with Article 220 or by another approved method. What would another approved method be in figuring a total service calculation? The way I see it, that building and it's associated equipment are part of the total service load figure. I have a generator rep telling me that only the loads that the owner want to include have to be figured in sizing the unit and service rated switch.I have installed smaller units 8,11KW etc that utilize 10/12 circuit transfer swith panels but never had to figure for whole house scenario with service rated switch. I asked if he was referring to a load management type switch and he said no. Any help appreciated.