i have a 400 1ph 240v meter box outside with a 3 1/2 pvc conduit with (6) 3/0 cu running to a 6x6 trough inside with two 200 amp panels mounted on the trough power company wants no grounding in there meter box can I tie both net together in the trough and do my bonding in the trough then take a #4 ground up to each panel.