There is a utility Xformer and we have 8 sets of 500kcmil conductors to the service disconnect about 50' away. The HRG is located by the Xformer and it has a 8AWG neutral to the Xformer XO terminal and from the load side of the resister a green wire (factory sized) to a grounding bar. From the grounding bar we bonded the Xformer casing. We didn't pull any supply side bonding jumpers with the service conductors to the service equipment. Isn't this a violation? Doesn't there need to be a connection from the Xformer case to the service equipment enclosure? If a fault took place in the Xformer on one phase then the service equipment on another phase then the earth would be the only thing between the two enclosures conducting the fault current to trip the OCP. The 500s were installed in PVC by the way