that would really constitute 52 separate answers, with variations from each of the 52 as to specifics. Inasmuch as it's called the NEC here, there is not much of a nationally recognized format for inspections.
Myself, the better jobs include some sort of authority allowing energizing, insuring licesed workers, etc. I really wish it were so universally. The final hookup is usually done where i am by the utlity as they want responsibility for said splice.