An electrician job description involves installing, maintaining, and repairing electrical wiring, systems, and fixtures in residential, commercial, or industrial settings, requiring the ability to read blueprints, troubleshoot faults with testing devices, and ensure all work complies with strict safety codes like the National Electrical Code (NEC). Key duties include diagnosing issues, replacing components (breakers, wiring, fixtures), performing preventative maintenance, and collaborating with teams, while requirements typically include apprenticeship completion, licensing, and strong knowledge of electrical theory and safety.