This question has no absolute correct answer. Looking through the responses I see things like smoke detectors, sump pumps, dishwashers, etc. None of these is required to have a "dedicated" circuit. Some might be better off that way but circuits for these are sized for the load intended to be connected. Smoke detectors in many areas can not be on a dedicated circuit. I suggest you read through 210 carefully to see what circuits are required and what they are alowed to serve.
