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by dangrie158 1958 days ago
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
1 comments
kube-system 1958 days ago
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.

link