Im working in a hog barn that is 4000 sq ft. They keep getting struck by lightning and losing expansive electronic controllers. The manufacturer had me install surge protectors on the individual controllers, but they have not taken care of the problem. I believe the bldg is taking the strikes and the surge is getting to the controllers through the communication wires going out to the equipment from the controller. Ive suggested lightning rods but the farmer is not convinced this will help either. He is losing thousands of dollars with every lightning storm we get and so far no one localy has been able to help. Any suggestions would be great. Oh yeah the bldg sits in the middle of an open field 500 ft from anything.