>When we moved in two years ago there was an intermittent earth fault, so we had everything checked then. They found the earth fault, it was a loose connector i

>When we moved in two years ago there was an intermittent earth fault, so we had everything checked then. They found the earth fault, it was a loose connector inside a T junction I believe. If there was one, there may be others. I've located several loose junctions in my attic (on my bathroom electric strip heaters). They were easy to spot because of the discolored insulation. At my own home my connection to the electrical grid also had such a fault (a corroded junction on one phase). It was an intermittent but persistent fault and I am surprised that I didn't ruin more electrical stuff before I found it. >I'm more inclined to believe it is caused by the crappy wiring system that is standard in my country, where there is not a neutral lead and a live one, but two live ones with a phase shift. Sorry, I shouldn't have assumed you were in North America.