OK, thanks for clarifying. :D Guess that means I have to place Power Switches away from any danger areas as they won't restore power after being rebuilt in a "hot zone". I might just put it as a request in the Ideas and Suggestions thread after 0.15 comes out as you guys need to worry more about ...

If a Power Switch is destroyed (such as by a player or biter) but then rebuilt using a Construction robot, the power lines connected to the Power Switch are not restored (However, circuit wires connected to it are). To be honest, I don't know if this is like this bug report https://forums.factorio ...