I’ve been traveling around the world. It is 50 / 50 of the socket is properly grounded —-anywhere in the world. I get a tingling zap on the wrist when not properly grounded. The charger also gets hot and sparks.
only two prongs of which make it through. Usually the regulation as I understand is that it's fine if you can prove the case can never get in contact with anything electric, for most laptops that's just being made of plastic.
Just take an apple charger and a multimeter, try to find a path to ground from the computer side, I'll wait. Plugs have regulations on how they can be built which are different from how they must be connected.
The big recess above the pins is what encases the button of the charger and provides grounding if it includes metal strips. Assuming the charger itself has a metal button.
In the EU a grounded cable has been the default forever (I have a grounded cable from my 2010 MBP which I use as travel cable for my 2021 MBP)
Which makes it non-compliant in the UK, and no doubt elsewhere too. I don't understand how Apple (hardly a small fly-by-night!) continues to get away with it.
That should not happen with a well designed power supply. It sounds like Apple cut some corners "for design reasons", or some shortcut to make it cheaper to manufacture.
