My home is covered by a tt earth system. I was recently doing some groundwork and discovered that my earth cable had come disconnected from the rod. This did not seem to effect the wiring in the house. I took the oportunity to replace the rod with a new one. The problem is that when i reconnected the earth cable to the rod my 100ma breaker trips and won't reset as long as the rod is connected. It works ok when the cable is disconnected. This seems to me that my home now has no earth cover. Am i wrong and has anyone any suggestions as to what may be the problem and how to rectify this?