My guys recently installed a back up generator and ATS on an 800 amp 3 phase 120/208 volt switch board. The client only wanted certain loads from the switchboard to energize during an outage. So what they did is took all of the breakers for the loads to be served from the generator and moved them to the bottom of the bussing in the switchboard. They cut the bussing above said breakers and tapped it with conductors rated at 800 amps and ranto the ATS which is rated at 800 amps and then ran conductors rated at 800 amps from the ATS back to the other half of the cut bussing. The project was inspected and approved by the AHJ. recently another EC saw the installation and raised a huge red flag tto the client and AHJ saying the install is not correct. Does anyone have any opinions on this? Code sections?