My family have recently moved to a new place, sort of rural area (in the mountains), I did found a power socket in the room, connected a multiple socket into it and plugged in iMac + wifi router, there was no problem at the beginning, but sometimes I feel sort of electrified field over the aluminium case (when trying to plug USB cabels).
The real case :)
Last night it was cold to work, so I decided plug 600W heater and after 1h I did touch the iMac and was "kindly" suggested to leave the party :) (very noticable electric shock).
I know it's more an engenieering question, but maybe someone had experienced similiar situation and can suggest what is the possible work around?
P.S: I used the same multiple socket in the previous house and had no problems, the new character here is the 600W heater that I've found recently from previous owners (looks like it's from early 2000')