In a new home out in the country the customer tells me that whenever the rural electric supplier has an outage on his line he experiences random tripping of AFCI breakers. The service is a 200 A meter pedestal with a 200A main and an additional space. A properly sized grounding conductor was ran about 100 ft with the feeder to the house. In the house panel the neutral is bonded to the can. there is an footing ground and a driven ground rod also. I am wondering if removing the bonding screw and putting all grounds on a grounding bar would correct this problem. I have no idea what nature of faults the power company is having. They seem to be pretty frequent. Does anyone have any other ideas as to what could cause random tripping of AFCIs?