Occasionally when carrying out rcd testing with a metrel 3100 I have had failures which upon investigation have been caused by me inadvertently leaving a piece of equipment connected to the cct the readings being x1=156 x5=>40 unplug or disconnect the piece of equipment and the readings return to normal. This as happened on various installations and the equipment that was found to be in cct always has a motor (fridge ect) Has anyone else experienced this problem?
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