Electronics > Beginners

New 2017 Macbook Pro 15 Inch giving me static electric shock. Is it normal?

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wraper:

--- Quote from: electrolust on August 31, 2017, 05:00:34 pm ---I didn't say it wasn't a typo.  I said it wasn't obviously a typo.  I don't know what the palm is about buddy, get over yourself.

--- End quote ---
Then it was a language barrier. And you wrote it in confusing way, and I'm not sure if grammatically correct, English is not my first and even not a second language. Now tried google translate, and it agrees with how I understood it (obviously, it was not a typo). If you wrote "it was not obvious typo" then I would understood you properly.

electrolust:

--- Quote from: bd139 on August 31, 2017, 09:52:49 am ---Just measured current between my ThinkPad T440 and ground: 82uA.

And the MacBook again: 103uA

--- End quote ---

I thought T-series were all plastic bodied?  Mind saying where exactly you measured on the case?  Can you feel the 103uA 0.103mA?

You inspired me.  I have a new USB-C MB from work, charging with Apple 2 prong adapter, and the current between case and ground is ... unmeasurable.  Am I doing it right?  I'm using the uA DC range, hot lead touching the MB case and ground lead touching the metal of a wrist static band that plugs into a wall outlet ground plug.  On the ACV setting I do measure 110V between hot and the the wrist band (ground plug), so for sure the ground wire is connected in the outlet.

From what I can gather, there should definitely be SOME leakage current, so I must be measuring it incorrectly?  Or is it possible that my charger doesn't in fact leak.

RGB255_0_0:
Well there isn't going to be DC through the cap  :)

electrolust:
 :palm:

Still no current using ACI measurement.   The laptop is fully charged though, so perhaps it's turned off the charging function.  I'll let the battery drain a bit.

electrolust:
0.200uA (200nA) measured with just the probes touching.  If I press the positive probe to the case with my finger, it goes to 15ua.  25nA if I put myself in the loop -- hot lead to case, gnd lead in hand, wrist strap to ground.

I'm using a miniature charger though, 29W or something like that.  Not the bigger 61W or 87W chargers.

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