I have a few questions about transformers and isolation. I will describe my understanding (maybe wrong) and questions about them.
- Transformers provide safe isolation by disconnecting two circuits electrically. So now instead of touching one hot wire on the isolated circuit, you must touch both to get shocked.
- Why don't my wall outlets work this way? I know there are many transformers used in the power distribution network. Is this because they are referenced to ground (with a center tap or something)?
- If the power lines are referenced to ground, why? Wouldn't it be safer to keep the power lines floating w.r.t. ground, so that for a shock to occur a person would have to touch two wires?
- Could I provide this protection at my home by putting a 1:1 isolation transformer between the power grid and my house?