If a set of plans as been reviewed and approved by the (AHJ), and most items on the plans exceeds the mimimun requirements of the NEC. for example the plans shows a 1200 amp service..but from your load calculations an 800 amp service will work,...the plan shows a #2/0 grounding electrode conductor(exothermic welded to ground rods,...but you decide to use a #6 and use mechanical connections .The inspector turns to job down because "the work was not done according to the approved plans" Question : is it the inspector duty to only enforce the NEC minimum requirments, and not beyoung that ?