As most of us already know the ground is connected to the case of the psu and when the psu comes in contact with the computer case it grounds the case. The ground wire in DC is 0(neutral) and below it is negative and above it is positive. I have a fanbus in my case and I was hooking up my new led fan I put the positive in the positive clip, but I forgot to put the negative in and when I turned my computer on the fan was spinning but I noticed that the negative was not clipped in. I thought that maybe a negative somewhere in the case was not properly insulated and was touching the case I checked everywhere for it but nope everything was insulated. After learning this I went to my sister's computer and tried to emulate the same thing again so i just put the positive in the molex and the negative on the case; guess what the fan spins. Now I thought something might be up with the ground in my house so I tried the same thing in my computer engineering class at school and the fan still spins. All my life I thought that ground was neutral or was I wrong.
Can anyone explain this?
Can anyone explain this?