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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

by 15155 6mo ago

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.

jahnu 6mo ago
However it’s wired up the fact is the electric buzzing feeling goes away if you use a grounded extension cable instead of two pin.
namibj 6mo ago
No they isolate L and N not PE.