| Electronics > Beginners |
| New 2017 Macbook Pro 15 Inch giving me static electric shock. Is it normal? |
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| jmelson:
--- Quote from: grumpydoc on August 29, 2017, 07:11:50 pm --- Take it to an electrician who can do portable appliance testing - if it is outside the leakage limit (250uA if the charger is double insulated and has no earth connection) then you have a claim against the retailer. --- End quote --- I really doubt the leakage is below 250 uA, or the OP would have been very unlikely to feel it. I suspect it is WAY more than that. Jon |
| wraper:
--- Quote from: jmelson on August 29, 2017, 09:51:34 pm --- --- Quote from: grumpydoc on August 29, 2017, 07:11:50 pm --- Take it to an electrician who can do portable appliance testing - if it is outside the leakage limit (250uA if the charger is double insulated and has no earth connection) then you have a claim against the retailer. --- End quote --- I really doubt the leakage is below 250 uA, or the OP would have been very unlikely to feel it. I suspect it is WAY more than that. Jon --- End quote --- 0.25mA feels quiet noticeably when current passes through you. |
| John B:
If you can't get an earthed 3 prong snub-nose adapter, you can always buy a cheap chinese 3 prong ~1.5m lead and then just trim the lead and put your own 3 prong connector on. That's how I made a short lead for the apple PSU. As above, it's normal, but it's annoying. The tingling, even stinging feeling seems to punch well above its weight for what the 100-250uA RMS would seem to imply. When I made my thread I only measured current with a multimeter, I didn't examine the waveform. Also worth noting, of the macbooks Ive tested, the chassis isn't conductive. Despite looking metallic, it's powder coated with an insulator, so the current is capacitively coupled. To that end, the surface area of what is touching the chassis will influence the current you feel. If you directly touch the chassis with a probe lead, the voltage and current will be less compared to placing a metal plate on the chassis then touching your probe to that. |
| electrolust:
--- Quote from: wraper on August 29, 2017, 10:10:27 pm --- --- Quote from: jmelson on August 29, 2017, 09:51:34 pm --- --- Quote from: grumpydoc on August 29, 2017, 07:11:50 pm --- Take it to an electrician who can do portable appliance testing - if it is outside the leakage limit (250uA if the charger is double insulated and has no earth connection) then you have a claim against the retailer. --- End quote --- I really doubt the leakage is below 250 uA, or the OP would have been very unlikely to feel it. I suspect it is WAY more than that. Jon --- End quote --- 0.25A feels quiet noticeably when current passes through you. --- End quote --- the number being discussed is .000250A, not .250A |
| electrolust:
many discussions about this if you google search. apparently it is not uncommon for non-3-prong plugs. I think the apple charger itself is only 2 prong if you don't use the long extension cable. |
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