Thanks for the answer! I measured voltage between the housing of a usb-cable plugged into my new laptop and the PSU-ground. It was a 275 mV DC difference. I think this should be ok? I'm not able to make the measurmement with my old laptop's USB-port, and there might have been a grounding error there...
The computer and the PSU were plugged into the same double contact with ground connectors. The wall plug that the double contact used was ungrounded.
Best regards
Torbjørn
The computer and the PSU were plugged into the same double contact with ground connectors. The wall plug that the double contact used was ungrounded.
Best regards
Torbjørn