A bit of an aside but I was given an ancient mains filter I tested it and got 2.5 nF between live an neutral and half that value from each side to earth also oddly just over 2Megohms neutral to earth and to high to read on live to earth anyhow befor plugging it into the mains I calculated worst case leakage and at 240 volts it just over a milliamp now I know it won't be that much because the neutral has no voltage on it but it seems that the 1 Megohm limit for installation resistance is sensible because not even the most sensitive RCD will be troubled by that and no watt hour meter will register it so really a win win I think
A bit of an aside but I was given an ancient mains filter I tested it and got 2.5 nF between live an neutral and half that value from each side to earth also oddly just over 2Megohms neutral to earth and to high to read on live to earth anyhow befor plugging it into the mains I calculated worst case leakage and at 240 volts it just over a milliamp now I know it won't be that much because the neutral has no voltage on it but it seems that the 1 Megohm limit for installation resistance is sensible because not even the most sensitive RCD will be troubled by that and no watt hour meter will register it so really a win win I think
