George:
First question I have is when did the utility start supplying a 400 Ampere meter enclosure? Second, are the lugs in the meter enclosure rated for more than 1 conductor? Based on the reply to these questions I think that the bonding requirements of 250-66 should be based on the 400 Ampere service as supplied by the utility. Expand on this and imagine 6 main breaker panels and a fire pump installed on this service. Knowing you I surely would not want to be the inspection after that one.
