Become a MacRumors Supporter for $25/year with no ads, private forums, and more!

MacBook Pro 13 EU USB-C charger not grounded?

Robertjan88

macrumors regular
Original poster
Oct 30, 2018
154
20
Yesterday, I bought a 13 inch MacBook Pro. When touching the MacBook, once it hits about 100%, I can feel static vibration (e.g. when swiping with my finger e.g. above the Touchbar).

The standard (default) EU USB-C charger has only 2 pins and does not seem to contain the additional iron grounding larger plugs have.

Is there a solution for this? Can static energy caused by lack of grounding damage the MacBook Pro in the long term when touching it (which would mean I can't charge and work at the same time)? I assume that the MacBook is working like a "cage of faraday", but rather double check. ;)
 
Last edited:

jerryk

macrumors 603
Nov 3, 2011
6,205
3,153
SF Bay Area
Yesterday, I bought a 13 inch MacBook Pro. When touching the MacBook, once it hits about 100%, I can feel static vibration (e.g. when swiping with my finger e.g. above the Touchbar).

The standard (default) EU USB-C charger has only 2 pins and does not contain the iron grounding larger plugs have.

Is there a solution for this? Can static energy caused by lack of grounding damage the MacBook Pro in the long term when touching it (which would mean I can't charge and work at the same time)? I assume that the MacBook is working like a "cage of faraday", but rather double check. ;)

The static you feel is harmless. But, you always buy a grounded plug/extension cord from apple that will replace the 2 prong plug on the charger and that should get rid of the static. They should be listed on the Apple website.
 
Comment

jerryk

macrumors 603
Nov 3, 2011
6,205
3,153
SF Bay Area
Thanks. Why is such a plug not standard?

It used to be they came with both the 2 prong and the grounded 1 meter extension plug. But I suspect most people, like me, prefer to plug the charger directly in the wall and never used the grounded plug 1 meter long cord. So they quit shipping them. I know I never even pulled this cord out of the box of my last 2 MacBook Pros.
 
  • Like
Reactions: Robertjan88
Comment

Ploki

macrumors 601
Jan 21, 2008
4,109
1,411
your installation ground is probably wired to neutral anyway
 
Comment

Robertjan88

macrumors regular
Original poster
Oct 30, 2018
154
20
your installation ground is probably wired to neutral anyway
? What do you mean by that? :)
Spoke to a Genius over the phone. They also mentioned it isn't harmful, but if I don't also recommendes the extended cable (which is grounded) in case it was a problem for me.

Relieves it's not harmful, but will probably buy the extended cable anyhow. It will eliminate the static vibration and give me more room due to the additional cable. :)
 
Comment

Conutz

macrumors 6502
Oct 24, 2014
261
152
Joburg
? What do you mean by that? :)
Spoke to a Genius over the phone. They also mentioned it isn't harmful, but if I don't also recommendes the extended cable (which is grounded) in case it was a problem for me.

Relieves it's not harmful, but will probably buy the extended cable anyhow. It will eliminate the static vibration and give me more room due to the additional cable. :)
I’ve felt that vibration when moving my fingers across the aluminium - it feels weird, but it definitely felt mechanical rather than electrical. It doesn’t happen all the time and I’d guess it depends on the level of moisture on your hands...
 
Comment

Ploki

macrumors 601
Jan 21, 2008
4,109
1,411
? What do you mean by that? :)
Spoke to a Genius over the phone. They also mentioned it isn't harmful, but if I don't also recommendes the extended cable (which is grounded) in case it was a problem for me.

Relieves it's not harmful, but will probably buy the extended cable anyhow. It will eliminate the static vibration and give me more room due to the additional cable. :)
https://en.wikipedia.org/wiki/Ground_and_neutral#Combining_neutral_with_ground
I’ve felt that vibration when moving my fingers across the aluminium - it feels weird, but it definitely felt mechanical rather than electrical. It doesn’t happen all the time and I’d guess it depends on the level of moisture on your hands...
it feels mechanical but it's electrical
 
Comment

mackiee

macrumors member
Mar 14, 2014
63
25
As said before, get the the extention cord with the grounded plug. I had exactly the same ”problem” and it went away (mostly if not all) when the charger is grounded.
 
Comment

Ploki

macrumors 601
Jan 21, 2008
4,109
1,411
As said before, get the the extention cord with the grounded plug. I had exactly the same ”problem” and it went away (mostly if not all) when the charger is grounded.
Grounding also works with children
 
Comment

magbarn

macrumors 68020
Oct 25, 2008
2,415
1,573
The sad thing is none of my MagSafe MacBooks did this. It’s a usb c charger MacBook issue. It bugs the heck out of me so thankfully had extension cords saved up from prior MacBooks which got rid of the problem
 
Comment

Ploki

macrumors 601
Jan 21, 2008
4,109
1,411
The sad thing is none of my MagSafe MacBooks did this. It’s a usb c charger MacBook issue. It bugs the heck out of me so thankfully had extension cords saved up from prior MacBooks which got rid of the problem
It's not a USB-C problem, and all MagSafe's did that without an extension...

it's a problem of apple being cheap
 
  • Like
Reactions: jerryk
Comment

y2jm14

macrumors newbie
Apr 7, 2019
1
0
I’ve felt that vibration when moving my fingers across the aluminium - it feels weird, but it definitely felt mechanical rather than electrical. It doesn’t happen all the time and I’d guess it depends on the level of moisture on your hands...


YES I FELT IT TOO. SOME vibration on the casing of MACBOOK PRO.

but is there any other way to prevent being grounded. I feel sometimes that there is static electricity,.
 
Comment

537635

macrumors 6502a
Mar 7, 2009
704
599
Slovenia, EU
That kind of installation is strictly illegal in Germany and probably in the rest of the EU as well...

Eastern Europe here. Anything built 1980 and later is definitely grounded. Before that it's a hit or miss. Might be properly grounded. Might be grounded to neutral. Might be grounded to lead water pipes and washing the dishes after turning on the stove will kill you (actually happened).
 
Comment
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.