NEC 2023 Article 210: 210.3 classification by rating (15A, 20A, 30A, 40A, 50A). 210.8 GFCI required: bathrooms, garages, outdoors, crawl spaces, unfinished basements, kitchens (within 6ft of sink), laundry, boathouses. 210.12 AFCI required: kitchens, bedrooms, living rooms, family rooms, dining rooms, closets, hallways, laundry, recreation rooms (essentially all habitable rooms). 210.52 receptacle placement: walls 12ft+ need receptacle, 6ft spacing along wall, within 6ft of any point along wall line. Kitchen: two 20A small appliance circuits, counter receptacles every 4ft, within 2ft of each counter end. Bathroom: one 20A circuit, receptacle within 3ft of basin edge. 210.70 lighting outlets required in each habitable room, bathroom, hallway, stairway, attached garage, outdoor entrance.