A contractor wants to install 3/0's through a meter mounted on the detached garage, from the load side of the meter feed a two switch disconnect immediately inside the garage, one 100amp fused switch will feed a panel in the garage with number 3's, and the other 200 amp fused switch will feed a panel in the house with 3/0's. The panel in the house has a main. The 2 switch disco is rated as service equip. The cold water ground connection from the house will be brought out to the garage and terminated in the 2 switch disco. Gnd rod will be installed and terminated in the meter.

Assuming load considerations are ok for the wire size being used, is there anything else that would make this not compliant?