In my house we have 2 outlet power sockets (no earth) and whenever I charge my laptop I would get electric shock from the laptop when I am touching ground like if I hold laptop on my lap and touch the wall or if my foot touches the floor. At the very least I feel vibrations in the laptop. Same for CPU body, mobile (if has some metal layer on it) ..
I have solved this problem for my room only by grounding my extension where I plug charger to garden outside my room. Basically my extention sockets have 3 outlets, I plugged one end of a cooper cable in one of the grounding outlet and the other in the garden soil. This solved the problem for my room, I do'nt get any vibration or current shock from my laptop in my room.
The problem persists though in the rest of sockets in our house like if I charge my htc desire mobile which has a bit of metal on it, I would be shocked if I happen to touch it bare footed while it is charging..
So this situation is persistent now and not something that happens rarely or occasionally.
I have tested the 2 outlets of the power socket
- I have checked the neutral/cold line shows no current (using the current testing screw driver), so assuming the potential is 0 there,
- hot line indicated current as expected
- The wire that I used in my room to ground one of the sockets, shows a bit of current
So given my situation that I have 2 pin power socks and house is not wired with grounding/earthing wire, how can I find the cause and resolve it