If a fuse/breaker was put in a bedroom instead of the main panel for example, and the wire going to the bedroom had a short, would that fuse protect that wire?
What if some sensitive electronic device was in a line and the breaker was after that near the power draw, if the device had a short, would the breaker trip?
I don't really understand your line of questions. I'm trying to think of how to best explain the reasons on where the protection should be. The fuse/breaker should be put where it protects everything in the line, I'm thinking. I have seen where a worker accidently, puts a screw into a wire in a wall and nobody knows it. Sometime later the breaker keeps tripping. If the breaker was at the outlet, that house might have burned.
Putting two breakers in the same line of the same value would be redundant I believe? Putting a smaller value at the draw when other things are on the same line might be better in some instances?
EDIT: I am not an electrician! 
