Inspect electrical systems, equipment, and components to identify hazards, defects, and the need for adjustment or repair Perform routine preventive maintenance to ensure that machines continue to run smoothly Diagnose malfunctioning systems, apparatus, and components, using test equipment and hand tools, to locate the cause of a breakdown and correct the problem Connect wires to circuit breakers, transformers, or other components Test electrical systems and continuity of circuits in electrical wiring, equipment, and fixtures, using testing devices Plan layout and installation of electrical wiring, equipment, or fixtures, based on job specifications and local codes Direct and train workers to install, maintain, or repair electrical wiring, equipment, and fixtures Prepare sketches or follow blueprints to determine the location of wiring or equipment and to ensure conformance to building and safety codes Perform business management duties such as maintaining records and files, preparing ...