Hey have I missed something. I put a 100a service on a barn/shop in a neighbooring county.Home owner had all permits of coarse. Well the service is back to back but I installed pvc between meter base and panel AJH tells home owner I must have 4 wire because of pvc.. to bond around the pvc pipe he provided no reference?I put a call in to him this am but haven`t recieved call back.