All true - but what about the DW which trips the RCD when it is plugged in but not switched on? ... and don't forget that exactly the same happens when the DW is plugged into different sockets, on different circuits, via an extension cable. That sounds to me like a either a fault in the DW's flex/plug, or a N-E fault within the DW, coupled with it only having a SP switch - but, in either case, the problem would be 'with the DW'. What's wrong with my reasoning?a phone charger has no earth connection, which might be relevant, and a current draw in the region of 0.03A, which might also be relevant.
Kind Regards, John