The problem with this is that if there is a ground fault on the service entrance feeder, at the service disconnect, it would be a high impedance fault and may not clear, because it would be using earth as the fault return path and this is a violation of NEC.That's interesting. If it's single phase i'd use a 3 pole breaker? Would 1 of the poles of that breaker get the neutral? Would i then use a splice through breaker style connection to feed the bus bar? If not, how would i make the connections? Is this totally NEC and AHJ acceptable?