An electrician's job involves installing, maintaining, and repairing electrical wiring, systems, and fixtures in buildings, ensuring they meet safety codes and function correctly. Key duties include reading blueprints, using testing equipment to diagnose faults, troubleshooting issues, performing routine maintenance, and ensuring compliance with the National Electrical Code (NEC). They work with various tools and equipment, often collaborating with other trades, and may specialize in residential, commercial, or industrial settings.