Article 310-15(b) of the 1996 NEC Engineering supervision, an engineer states that with his calculations he can use 4-4/0 conductors on a 4 wire wye circuit with a 225 ampere over currant protection. Would this override 310-15 Note #10(c). He has 4/0 copper in EMT in an electric room. And would you rquire the engineer to show his calculations? Thanks Joe