3 ms·

Using a 3 prong extension cable on the charger will prevent this.

by ajam1507 6mo ago

imglorp 6mo ago
How? The (US) charger's only got 2 pins so ground stays unconnected.
- Tsiklon 6mo ago
  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
  - 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.
- bombcar 6mo ago
  I don't know if this link will work - https://www.chargerlab.com/wp-content/uploads/2022/06/2022061718103949.jpeg https://www.chargerlab.com/wp-content/uploads/2022/06/202206... but that metal round pin thing is a ground; and the three-prong cable connects to it.
- pxx 6mo ago
  There are grounded duckheads for this purpose, e.g. https://amzn.to/4cnzuef https://amzn.to/4cnzuef (note out of stock. I guess your best bet is to use a UK duckhead, but half of those have a dummy ground...) if you take the plug part from the brick you'll note that there's only two pins but the button-like thing is a ground as noted in a sibling, the power adapter extension cable does plumb the ground through (https://www.apple.com/shop/product/mw2n3ll/a/power-adapter-extension-cable?cid=aos-us-seo-pla-accessories https://www.apple.com/shop/product/mw2n3ll/a/power-adapter-e...)
  - jahnu 6mo ago
    Got a bunch of cheap ones from Ali Express and they worked fine.
- BobAliceInATree 6mo ago
  Apple sells a 3-pin extension cable US Version: https://www.apple.com/shop/product/mw2n3ll/a/power-adapter-extension-cable https://www.apple.com/shop/product/mw2n3ll/a/power-adapter-e...
CGamesPlay 6mo ago
That cuts it by about 90%. But as others have said, the default US plug doesn't ship with a ground pin (though the extended cord does IIRC).
Barbing 6mo ago
No way, that's why it's "fixed" sometimes, thanks

Using a 3 prong extension cable on the charger will prevent this.

imglorp 6mo ago

How? The (US) charger's only got 2 pins so ground stays unconnected.

Tsiklon 6mo ago
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
- 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.
bombcar 6mo ago
I don't know if this link will work - https://www.chargerlab.com/wp-content/uploads/2022/06/2022061718103949.jpeg https://www.chargerlab.com/wp-content/uploads/2022/06/202206... but that metal round pin thing is a ground; and the three-prong cable connects to it.
pxx 6mo ago
There are grounded duckheads for this purpose, e.g. https://amzn.to/4cnzuef https://amzn.to/4cnzuef (note out of stock. I guess your best bet is to use a UK duckhead, but half of those have a dummy ground...) if you take the plug part from the brick you'll note that there's only two pins but the button-like thing is a ground as noted in a sibling, the power adapter extension cable does plumb the ground through (https://www.apple.com/shop/product/mw2n3ll/a/power-adapter-extension-cable?cid=aos-us-seo-pla-accessories https://www.apple.com/shop/product/mw2n3ll/a/power-adapter-e...)
- jahnu 6mo ago
  Got a bunch of cheap ones from Ali Express and they worked fine.
BobAliceInATree 6mo ago
Apple sells a 3-pin extension cable US Version: https://www.apple.com/shop/product/mw2n3ll/a/power-adapter-extension-cable https://www.apple.com/shop/product/mw2n3ll/a/power-adapter-e...

CGamesPlay 6mo ago

That cuts it by about 90%. But as others have said, the default US plug doesn't ship with a ground pin (though the extended cord does IIRC).

Barbing 6mo ago

No way, that's why it's "fixed" sometimes, thanks