Generator transfer switch

[LarryFine]

Answer: Because when the switch is in the ultility position, it IS carrying the whole load of the house! Just because the generator can't supply the full load doesn't reduce the amps through the switch when the thing is selecting utility. You would need a 350-amp transfer switch even with a 1 amp generator, unfortunately.

That points out a major advantage of splitting the service into genny-supplied and non-genny-supplied panels. Smaller ATS and easier to control loading.