Yes it would in fact be two separate service sources to the same generator from 2 separate buildings. The main house with a 400 amp service is about 200 feet from the detached garage. The original detached garage was supplied power from the house via a 100 amp sub-panel, this garage houses the 43KW generator and supplies emergency backup power to the residence and detached garage. Now the owner had an addition attached to the detached garage, this addition exceeded the capacity of the 400 amp service on the house so it could not be supplied power from the original sub-panel in the detached garage. Following so far?? This is an 18,000 sq ft single family residence, dad,mom,and 2 sons.
As to the second question of 2 separate services feeding the same building... technically yes. The original detached garage supplied from a sub-panel powered by the house panel, and the addition to the detached garage powered by a new 200 amp service.
230.2 C 2 and 230.2 C 3 were originally offered as suffient cause by the local authority according to the owners documentation.
The main reason for the contact with the owner was the lack of a generator maintenance program. The usage of the garage housing the generator is what has opened this can of worms.
