# Electrical and Electronics Repairers, Powerhouse, Substation, and Relay > Inspect, test, repair, or maintain electrical equipment in generating stations, substations, and in-service relays. - Code: 49-2095.00 (O*NET-SOC; SOC 2018 49-2095) - Family: [Installation, Maintenance & Repair](https://foundation.org.ai/occupations#family-49), one of its 52 occupations - Tasks: 15 tasks (9 core and 6 supplemental) - Page: https://foundation.org.ai/occupations/49-2095.00 - JSON: https://foundation.org.ai/data/tasks/49-2095.00.json ## What the work is made of 1. Inspect and test equipment and circuits to identify malfunctions or defects, using wiring diagrams and testing devices such as ohmmeters, voltmeters, or ammeters. Core task · Task 11743 · Rated by 79 people who do the job, July 2017 2. Prepare and maintain records detailing tests, repairs, and maintenance. Core task · Task 11747 · Rated by 79 people who do the job, July 2017 3. Consult manuals, schematics, wiring diagrams, and engineering personnel to troubleshoot and solve equipment problems and to determine optimum equipment functioning. Core task · Task 11744 · Rated by 79 people who do the job, July 2017 4. Analyze test data to diagnose malfunctions, to determine performance characteristics of systems, or to evaluate effects of system modifications. Core task · Task 11748 · Rated by 79 people who do the job, July 2017 5. Open and close switches to isolate defective relays, performing adjustments or repairs. Core task · Task 11746 · Rated by 79 people who do the job, July 2017 6. Notify facility personnel of equipment shutdowns. Core task · Task 11745 · Rated by 77 people who do the job, July 2017 7. Repair, replace, and clean equipment and components such as circuit breakers, brushes, and commutators. Core task · Task 11750 · Rated by 78 people who do the job, July 2017 8. Run signal quality and connectivity tests for individual cables, and record results. Core task · Task 11753 · Rated by 79 people who do the job, July 2017 9. Maintain inventories of spare parts for all equipment, requisitioning parts as necessary. Core task · Task 11756 · Rated by 79 people who do the job, July 2017 10. Construct, test, maintain, and repair substation relay and control systems. Supplemental task · Task 11742 · Rated by 78 people who do the job, July 2017 11. Test insulators and bushings of equipment by inducing voltage across insulation, testing current, and calculating insulation loss. Supplemental task · Task 11749 · Rated by 79 people who do the job, July 2017 12. Schedule and supervise the construction and testing of special devices and the implementation of unique monitoring or control systems. Supplemental task · Task 11752 · Rated by 79 people who do the job, July 2017 13. Schedule and supervise splicing or termination of cables in color-code order. Supplemental task · Task 11754 · Rated by 79 people who do the job, July 2017 14. Test oil in circuit breakers and transformers for dielectric strength, refilling oil periodically. Supplemental task · Task 11755 · Rated by 78 people who do the job, July 2017 15. Disconnect voltage regulators, bolts, and screws, and connect replacement regulators to high-voltage lines. Supplemental task · Task 11751 · Rated by 79 people who do the job, July 2017 ## More in Installation, Maintenance & Repair - [Aircraft Mechanics and Service Technicians](https://foundation.org.ai/occupations/49-3011.00): 38 tasks - [Audiovisual Equipment Installers and Repairers](https://foundation.org.ai/occupations/49-2097.00): 11 tasks - [Automotive Body and Related Repairers](https://foundation.org.ai/occupations/49-3021.00): 25 tasks - [Automotive Glass Installers and Repairers](https://foundation.org.ai/occupations/49-3022.00): 18 tasks - [Automotive Service Technicians and Mechanics](https://foundation.org.ai/occupations/49-3023.00): 30 tasks - [Avionics Technicians](https://foundation.org.ai/occupations/49-2091.00): 13 tasks - [Bicycle Repairers](https://foundation.org.ai/occupations/49-3091.00): 14 tasks - [Bus and Truck Mechanics and Diesel Engine Specialists](https://foundation.org.ai/occupations/49-3031.00): 26 tasks - [Camera and Photographic Equipment Repairers](https://foundation.org.ai/occupations/49-9061.00): 15 tasks - 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