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Tsiklontoday at 2:18 AM1 replyview on HN

The extension cable they used to include in box with the computers, it has the third pin for the charger brick connector which is wired to ground


Replies

15155today at 2:45 AM

There's zero chance that the DC ground in the laptop is tied to earth ground in the charger: they use LLC resonant converters and flyback converters (depending on vintage) - an earth ground tie would defeat the purpose of these isolated topologies.