NEC 2023 (NFPA 70): Service: 100A minimum residential, 200A typical (recommended for modern loads + EV). Panel: main disconnect, grounding electrode system (2 rods 6ft apart or Ufer). Branch circuits: 15A or 20A general purpose, 20A kitchen (2 circuits), 20A bathroom, 20A laundry, 20A garage. AFCI: required in all habitable rooms (bedrooms, living, dining, family, halls, closets, rec rooms) per 210.12. GFCI: required in kitchens, bathrooms, garages, outdoors, basements, crawlspaces, laundry, boathouses per 210.8. Receptacle spacing: 12ft max (6ft from any point on wall), per 210.52. Kitchen countertop: receptacle within 24in of each countertop space, 4ft max spacing. Lighting outlets: every room, at stairways, exterior at each exit. Smoke/CO alarms: per NFPA 72 — in every sleeping room, outside each sleeping area, every level. EV ready: 40A 240V circuit to garage required in many jurisdictions (CA, WA, OR mandate).