"stryped" wrote in message
...

-is there a reason to run the second sub from the main panel rather
-than the 1st sub panel?

Yes, you want your load to come through the 200 amp main breaker if you have
a 200 amp meter can and service. Connecting up stream or bypassing the 200
amp main could allow you to overload the service.

-Do I need a disconnect on top of having a panel in the attached garage
-with a main breaker? Where would I put it, on the outside of the
-building?

I'm not certain what the codes say, but a disconnect on the outside of your
main service panel could be a good idea just before you go underground. When
you come up to the new service, a fused disconnect shouldn't be necessary if
you come through the wall, and immediately in to your new panel. If you
cannot locate your new main panel, just inside the wall from your service
entrance, then yes, a fused disconnect would be a must.