Hello everyone! There is something about grounding in AC systems that has been bothering me for a while. I have read almost all of the threads about grounding here, but I haven't found my specific question on any of them. In my house, there are 3 wires that come from my outlet, the hot wire, the neutral wire and the ground wire. So let's say that I plug something on the wall and let's represent it by a dark box. What we would basically have is Figure A (Where H stands for hot wire, N for neutral and GND for ground). Now, the reason why we grounded our dark box is because we want to keep it at 0V to ground, so that people who touch it don't possibly get shocked. This all I understand, but I am not catching the actual circuit that exists behind it. What I thought the actual circuit could like is Figure B, where our dark box is represented by a resistor R, a capacitor C and an inductor L. If my representation of the circuit behind all this is incorrect, please tell me how it actually is, otherwise, I have a question. Here is the deal, I was told that there is generally no current flowing through the ground wire. However, if you look at figure 2, you will notice that, considering that the neutral wire and the ground wire should be so-so at the same potential, current would flow through both of them. After all, in order to current to flow, you just need a potential difference. Thanks in advance!