What are the key electrical safety standards for residential installations in North America?

Residential electrical installations in North America must comply with the National Electrical Code (NEC), specifically NFPA 70, which is updated every three years. Article 210 of the NEC mandates that branch circuits for general-purpose receptacles and lighting in dwelling units be rated at a minimum of 15 amperes. Additionally, the NEC requires arc-fault circuit-interrupter (AFCI) protection for all 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets in habitable rooms, as outlined in Section 210.12. Ground-fault circuit-interrupter (GFCI) protection is mandatory for receptacles in bathrooms, garages, kitchens, and outdoor areas per Section 210.8. These standards are enforced through local building codes and inspections to mitigate fire and shock hazards in homes.