MacBook feels like current is going through it when plugged in, “vibrate” feeling

Discussion in 'MacBook Pro' started by Hieveryone, Jul 23, 2019.

  1. Hieveryone macrumors 68040

    Hieveryone

    Joined:
    Apr 11, 2014
    #1
    When I plug in my MacBook Pro it feels like current is going through when I drag my hand over it. It kind of if feels like it’s “vibrating”
     
  2. BLBL macrumors 6502a

    Joined:
    Apr 11, 2018
    #2
    Power supply does not have grounding, unless you buy separate cable instead of plug integrated in charger and then use grounded outlet. Basically nothing serious.
     
  3. Hieveryone thread starter macrumors 68040

    Hieveryone

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    Apr 11, 2014
    #3
    How do I use a grounded outlet? I’m using the USB-C one so idk how to use a separate cable
     
  4. BLBL macrumors 6502a

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    Apr 11, 2018
    #4
    Apple sells cable that you use to replace the included plug in the charger that comes with the machine. But is is not plug as the one that come with the charger, it is a cable with suitable plugs on each end, so not very practical but does the trick if vibration bothers you. The vibration you feel is from small leak current due to missing ground. To prove that theory, next time you feel it then touch the machine with your other hand at the same time and it cannot be felt.
     
  5. Hieveryone thread starter macrumors 68040

    Hieveryone

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    Apr 11, 2014
    #5
    I'm not sure what you're talking about but can you link the cable? I want to buy it
     
  6. curmudgeonette macrumors 6502a

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    Jan 28, 2016
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    California
    #6
    Instead of plugging the power brick into the wall, Apple sells an AC cable that goes from the wall to the brick. This cable has a three prong grounded plug on the end that plugs into the wall.

    BTW, this "vibrate" issue has been around a long time - from the PowerBook era and maybe before!
     
  7. Hieveryone thread starter macrumors 68040

    Hieveryone

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    Apr 11, 2014
    #8
  8. iMacDragon macrumors 68000

    iMacDragon

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    Oct 18, 2008
    Location:
    UK
    #9
    They stopped including them around 2015 or 2016 model.
     
  9. BLBL macrumors 6502a

    Joined:
    Apr 11, 2018
    #10
    I guess simple reason to use small plug instead of three prong cable is to reduce clutter with cables. Personally I like power brick this small with only one cable going from it. I do feel that vibration with mine but knowing what causes it does not bother me. I guess it is just something that needs to keep in mind if connecting some delicate equipment. It is like using desktop computer in non grounded outlet.
     
  10. pshufd macrumors 65816

    Joined:
    Oct 24, 2013
    Location:
    New Hampshire
    #11
    In the old days, the power bricks looked like this. As you can see, it's a two-pronged plug:

    [​IMG]



    Apple also provided a cable. You took out the two-pronged plug and replaced it with the grounded cable:

    [​IMG]
     
  11. kp98077 macrumors 6502a

    kp98077

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    Oct 26, 2010
    #12
    Hmmm that seems strange to me, never experienced that, is it like a shock??
     
  12. pshufd macrumors 65816

    Joined:
    Oct 24, 2013
    Location:
    New Hampshire
    #13
    It's like a fuzzing sensation on your fingertips.

    Sometimes you feel it touching the metal surface of an appliance where the plug isn't grounded or there's no actual ground even though the plug will accept it.
     
  13. pshufd macrumors 65816

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    Oct 24, 2013
    Location:
    New Hampshire
    #15
    Yeah, it's annoying. I use external KVMs so rarely see the problem. And you can always just run on battery if your notebook is charged.
     
  14. kp98077 macrumors 6502a

    kp98077

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    Oct 26, 2010
    #16
    this is not an issues with the 2019 13" then? this seems VERY ODD to me... lol
     
  15. pshufd macrumors 65816

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    Oct 24, 2013
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    New Hampshire
    #17
    I think that it's an issue with any metal appliance.
     
  16. buran-energia macrumors regular

    Joined:
    Oct 9, 2017
    #18
    1). Your charger/adapter needs to have three pins (one for ground).
    2). Your power outlet needs to be grounded.

    If either of those are not met, you might get the vibrating/electric feeling.
     
  17. chrono1081 macrumors 604

    chrono1081

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    Jan 26, 2008
    Location:
    Isla Nublar
    #19
    It's the outlets in your house most likely. When I worked overseas I would feel this but at home (where I had much better outlets) I did not.
     
  18. pshufd macrumors 65816

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    Oct 24, 2013
    Location:
    New Hampshire
    #20
    You'll find this in older homes too, say, built 100 years ago where the wiring hasn't been updated.
     
  19. kp98077 macrumors 6502a

    kp98077

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    Oct 26, 2010
    #21
    so this is only when the macbook is plugged in right? only apple... oy!
     
  20. Jimmy James macrumors 601

    Jimmy James

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    Oct 26, 2008
    #22
    Hard drive is spinning. Also, eject the CD-rom.
     
  21. kp98077 macrumors 6502a

    kp98077

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    Oct 26, 2010
    #23
    CD ROM?
     
  22. DeltaMac macrumors G3

    DeltaMac

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    Jul 30, 2003
    Location:
    Delaware
    #24
    A MacBook Pro has no spinning hard drive, and no CD-ROM since 2012 models.
     
  23. Michael Scrip macrumors 603

    Joined:
    Mar 4, 2011
    Location:
    NC
    #25
    Can someone explain the grounded Apple power extension cable linked above?

    Obviously it has the third prong which is typical for grounded plugs.

    But... there are still only two prongs going into the power adapter itself.

    So is it actually being grounded?

    Usually if a laptop charger is grounded it accepts a 3-prong "Mickey Mouse" cable like this:

    [​IMG]
     

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44 July 23, 2019