We are thinking of building an ADU (Auxiliary Dwelling Unit, or "in-law suite") in our backyard.
The planned ADU's square footage will be 852 square feet. It will be 70 ft away from the main house, which is 1045 sq. ft.
We submitted our plan, but it didn't pass. This is because of the main service, which is 100 amps. The inspector told us to install a 400 amp main, to service the back house.
We would like to know which rule in the NEC the inspector is referring to. Can you tell us?