Existing 400Amp panel, Main Lug 3P, 120-208vOLT with a High Leg, Total of breakers in panel is 2-150Amp 2Pole, and 4-200Amp 3Pole breakers in it. Is it legal or does it have to have a means of a disconnect??? Feed from CT Cabinet located 10' away. All breakers are Controlling Sub Panels thru out a warehouse and None of them have any Main breakers as well..