Electricians specialize in troubleshooting, diagnosing, repairing, installing, and modifying various electrical and control systems for construction sites, plants, office buildings, and homes. Duties may include identifying electrical problems, performing preventative maintenance, and reading schematics or technical blueprints to complete jobs. They must follow all local and national electrical codes, safety codes, and safety procedures to install and repair complex electrical control, wiring, and lighting systems. Electricians typically work full time, with some overtime in peak periods. This is an entry-level position for licensed electricians that have already completed an apprenticeship.