mild electric vibrations or shock with magsafe

Discussion in 'MacBook Air' started by macdemon, Sep 21, 2011.

  1. macrumors newbie

    Joined:
    Aug 29, 2011
    #1
    hi
    when i connect my MBA 13 to the mains with magsafe and touch the laptop it gives a mild electric shock or vibrationor tingling sensation.
    the laptop works fine
    is it normal to have that?
    thanks
    :D
     
  2. macrumors 6502a

    Joined:
    Aug 21, 2010
    Location:
    Athens, Greece
    #2
    Depending on the surface it was on (happened on 2 different desks, thankfully not MY desks), my macbook pro would do that when you touched it. And not anywhere near the magsafe! Even when you were typing and your hands were on the edge of it, it would shock you! But again, only on a certain desk (material type).
     
  3. macrumors 68040

    Joined:
    Dec 14, 2007
    #3
    Not normal EVER!

    Take it in for repair.
     
  4. macrumors regular

    Joined:
    Aug 8, 2011
    #4
    normal. why? depending on the wall outlet plug is a three pin(earthed) or two pin (unearthed) connected to the power brick, those antbite sensation means the chassis of the notebook isn't earthed.

    happens to all electronic appliances that's ungrounded.
     
  5. macrumors member

    Joined:
    Sep 15, 2011
    Location:
    Amsterdam
    #5
    It's not MagSafe related; my PowerBook G4 did that, and my MacBook Air does it, too.

    You'll grow to like it. ;)

    .tsooJ
     
  6. macrumors 68040

    Joined:
    Dec 14, 2007
    #6
    Forgot about you third world owners....sorry
     
  7. macrumors regular

    Joined:
    Aug 8, 2011
    #7
    why do u say that?
     
  8. macrumors member

    coopiklaani

    Joined:
    Aug 12, 2011
    Location:
    UK
    #8
    Completely normal. This is due to lack of earth/ground of MagSafe adapters. Doesn't matter if you connect it to a 3 pins or 2 pins wall socket, it is only 2 connections that actually go into the adapter.
     
  9. macrumors 6502a

    Joined:
    Aug 21, 2010
    Location:
    Athens, Greece
    #9
  10. macrumors regular

    Joined:
    Aug 8, 2011
    #10
  11. macrumors 68020

    Kissaragi

    Joined:
    Nov 16, 2006
    #11
    My macbook pro used to do it when it was on a table, tho weirdly it seemed to improve after a few months.
     
  12. thread starter macrumors newbie

    Joined:
    Aug 29, 2011
    #12
    thank you all for your replies
    i am much relieved
    cheers!:D
     
  13. macrumors regular

    Joined:
    Aug 8, 2011
    #13
    try this test. while seated in your non-metallic chair, run your fingers on the AC-powered MBA (on your table) with & without ur bare feet touching the ground. the effect will be different.:D
     
  14. macrumors member

    Joined:
    Sep 15, 2011
    Location:
    Amsterdam
    #14
    MagSafe adapters are grounded, if used with the cable with the three-pronged plug. In fact, in any country with decent electrical standards, it is illegal to sell a device with a three-pronged plug unless it is actually grounded.

    [​IMG]

    See that metal "button" on the adapter itself? That's the ground lead that the three-pronged-plugged cable connects the ground pin to.

    .tsooJ
     
  15. macrumors member

    coopiklaani

    Joined:
    Aug 12, 2011
    Location:
    UK
    #15
    Yeah, but it's missing the metal contact on the plug bit making that metal button completely useless.:mad:
     

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  16. macrumors 6502

    Joined:
    May 20, 2010
    #16
    I don't see how this is "normal", mind you I'm no electrical engineer. I would not keep a product that shocked me, or even gave the sensation of having current run through it like that.
     
  17. macrumors member

    Joined:
    Sep 15, 2011
    Location:
    Amsterdam
    #17
    [​IMG].tsooJ
     
  18. komoornik, Sep 26, 2011
    Last edited: Sep 26, 2011

    macrumors regular

    Joined:
    Jul 29, 2011
    #18
    Grounded or not grounded? That is the question.
     
  19. macrumors regular

    Joined:
    Mar 14, 2009
    #19
    I live in the US and when plugged in to 110-120 volt electric plugs no vibrations. Now that I'm traveling and using 220 volt circuits I do notice the tingling electrical vibe. It is more apparent on the thicker part of the keyboard assembly near the hinge than on the razor blade corners.
     

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