The voltage measured will be a function of the loading on the circuit at any given time. I have a feeling this particular test may just confuse things....
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17 years ago
Tracking RCCB nuisance tripping
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17 years ago
And switching the breakers off will ensure the same zero loading on all circuits.
NT
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17 years ago
Bear in mind that leakage currents will not necessarily add arithmetically. E.g. your 2 mA from the washing m/c (which seems a bit high) is likely to be capacitive and will add in phase quadrature to any resistive leakage current present. So 5 plus 2 makes 5.4 in this case.
Classic intermittent fault behaviour to a tee...