sweejin wrote:
hello guys, i've posted a reply to a similar problem i have when i purchased my MBA 13" 256 GB SSD 2011 today.
here is the link, and i hope it will help you guys 🙂 thought i'd post here as well, since i understand how distressing this problem can be, especially with such an expensive hardware.
https://discussions.apple.com/thread/2663087
and p/s, i live in a 2-year modern well built condominium in Malaysia with 3-phases voltage regulators etc, so i don't buy into poor grounding as the reason to the charging vibration/current leakage. and i think it's not an issue with different country voltages. my suspicion is the poor slightly mismatched fuses that they bundled with the MacBook Air packaging. not sure who's to fault.
Your building might have 3 phase service but the wall outlets are single phase (actually 270 degrees of any 2 of the 3 phases), fuses will have no effect, the most likely cause is phase misconnection further 'up' the line (at the service entrance to the building is the most likely).
A quick test is to reverse the connection at the wall, but that should be undertaken by an electrician.