Re:Teardown of the Apple's A1243 Keyboard
by kube-system on Friday February 12, 2021 @01:56PM
(#26117123)
Usually when electronic devices have a metal housing, they're tied to ground. Getting shocked could be a sign of a wiring issue in the building. Ground should be at zero electrical potential.
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Re:Teardown of the Apple's A1243 Keyboard
by dangrie158 on Friday February 12, 2021 @02:25PM
(#26117511)
The tingling you may feel is absolutely normal. Most devices (Mac minis and MacBooks while connected to the charger) don‘t even connect to PE (only 2 connectors on the plug).
The tingling comes from some leakage across the transformer isolated primary/secondary but is so small that it’s not dangerous.
That’s also completely unrelated to static discharges that zap you once you touch something that can equalize the potential
Re:Teardown of the Apple's A1243 Keyboard
by kube-system on Friday February 12, 2021 @02:46PM
(#26117757)
The post on the AC adapter (that the duckhead or extension cable slots into) is earthed, and some adapters (other than the 2 prong US duckhead) continue this to the building ground.
The US extension cable is earthed, and I believe some duckheads in other countries are as well. The power adapters that were in use for mac desktops during the time period that the person I am replying to was referring to were earthed. https://th.bing.com/th/id/OIP.vmVNrqGAR3raMcey5fAXUQHaE6
Although you are correct in cases where the device is not earthed.