I am an ordinary person with absolutely no knowledge regarding electricity and how it works (things like circuits and such) and I never really cared before until now when I sense potential safety issues in the place I just moved in. I really hope you can explain things in a way that's easy for me to understand. I did some research about "ground" and "neutral" concepts and now I have a bunch of questions about safety. I'm in California, US. My apologies for the super-long post ahead. Basically...