The electrical code imposes a variety of requirements for different rooms of the house, in a way that implies that the house is divided up into non-overlapping, specific-purpose rooms at construction/wiring time.
(for example: Kitchens require a large number of GFCI receptacles on high-current circuits, close-together, bedrooms must be AFCI-protected, bathrooms must have a GFCI receptacle by the sink, etc.)
Obviously this gets a bit confusing in the open-plan houses that are popular today, and I have seen no clarity as to how these are to be handled.
Beyond that, I want to know how the code handles an austere one-room house with few or no permanent interior walls at all, where there are no more than two or three rooms and they all have multiple functions, and almost nothing is permanently installed. (This is in a rural jurisdiction with minimal building code requirements, so that won't be a problem). Do I have to combine every requirement for the whole room? Do I just split it up by floor plan, even though there are no actual barriers?