mild electric vibrations or shock with magsafe

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

  1. macdemon 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. orfeas0 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. ZipZap macrumors 601

    Joined:
    Dec 14, 2007
  4. macneubie 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. gyorpb 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. ZipZap macrumors 601

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

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    Aug 8, 2011
    #7
    why do u say that?
     
  8. coopiklaani 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. orfeas0 macrumors 6502a

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

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    Aug 8, 2011
    #10
  11. Kissaragi macrumors 68020

    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. macdemon thread starter macrumors newbie

    Joined:
    Aug 29, 2011
    #12
    thank you all for your replies
    i am much relieved
    cheers!:D
     
  13. macneubie 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. gyorpb 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. coopiklaani 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. Beaverman3001 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. gyorpb macrumors member

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

    komoornik macrumors regular

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