I got a dry tumbler and a washing machine that give off shocks when touched on the inner barrel.
I'm in Europe 230AC 3 phase 50Hz but no ground(old house) ground is connect to neutral at main panel going around the main HPFI breaker.
With high impedance DMM I measure 120V between each machine inner barrel and water pipe. Between them I measure 200V. All at 50Hz. Putting meter in low impedance I measure 4V between them and 2V to water pipe. Taking some cobber wire and connecting to washer and then tabbing the dryer I can throw small sparks.
If I turn off the power on the wall socket all measurements go to zero.
The machines are not grounded at the wall socket.
My first guess was capacitive coupling from the main breaker panel that is right next to the machines but I'm not so sure when all goes to zero when I turn off the power and I can throw continuous sparks when on.
Thank you for any help!