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Electrical and Electronics Repairers, Powerhouse, Substation, and Relay - 49-2095.00

O*NET-SOC Description

Inspect, test, repair, or maintain electrical equipment in generating stations, substations, and in-service relays.

Sample of Reported Job Titles

  • Electrical and Instrumentation Technician (E & I Technician)
  • Electrical Technician
  • Instrument and Control Technician (I & C Technician)
  • Instrumentation and Control Technician (I&C Technician)
  • Relay Technician
  • Substation Electrician
  • Substation Mechanic
  • Substation Technician
  • Substation Wireman
  • Wireman

SOC Occupation Groups

Related Occupations


  • Analyze test data to diagnose malfunctions, to determine performance characteristics of systems, or to evaluate effects of system modifications.
  • Construct, test, maintain, and repair substation relay and control systems.
  • Consult manuals, schematics, wiring diagrams, and engineering personnel to troubleshoot and solve equipment problems and to determine optimum equipment functioning.
  • Disconnect voltage regulators, bolts, and screws, and connect replacement regulators to high-voltage lines.
  • Inspect and test equipment and circuits to identify malfunctions or defects, using wiring diagrams and testing devices such as ohmmeters, voltmeters, or ammeters.
  • Maintain inventories of spare parts for all equipment, requisitioning parts as necessary.
  • Notify facility personnel of equipment shutdowns.
  • Open and close switches to isolate defective relays, performing adjustments or repairs.
  • Prepare and maintain records detailing tests, repairs, and maintenance.
  • Repair, replace, and clean equipment and components such as circuit breakers, brushes, and commutators.
  • Run signal quality and connectivity tests for individual cables, and record results.
  • Schedule and supervise splicing or termination of cables in color-code order.
  • Schedule and supervise the construction and testing of special devices and the implementation of unique monitoring or control systems.
  • Set forms and pour concrete footings for installation of heavy equipment.
  • Test insulators and bushings of equipment by inducing voltage across insulation, testing current, and calculating insulation loss.
  • Test oil in circuit breakers and transformers for dielectric strength, refilling oil periodically.

Detailed Work Activities

  • Analyze test or performance data to assess equipment operation.
  • Clean equipment, parts, or tools to repair or maintain them in good working order.
  • Confer with coworkers to coordinate work activities.
  • Connect electrical components or equipment.
  • Control power supply connections.
  • Document operational activities.
  • Document test results.
  • Inspect equipment to locate or identify electrical problems.
  • Install structural foundations.
  • Maintain inventories of materials, equipment, or products.
  • Maintain repair or maintenance records.
  • Order materials, supplies, or equipment.
  • Read technical information needed to perform maintenance or repairs.
  • Repair electrical circuits or wiring.
  • Repair electrical components.
  • Repair electronic equipment.
  • Schedule repair, installation or maintenance activities.
  • Supervise employees.
  • Test electrical circuits or components for proper functioning.
  • Test electrical equipment or systems to ensure proper functioning.
  • Test fluids to identify contamination or other problems.

Military Crosswalk Titles

  • Aircraft Electrical Systems Technician, EA-6 (Marine Corps - Enlisted)
  • Aircraft Electrical Systems Technician, F/A-18 (Marine Corps - Enlisted)
  • Aircraft Electrical Systems Technician, KC-130 (Marine Corps - Enlisted)
  • Aircraft Electrical/Instrument/Flight Control Systems Technician, IMA (Marine Corps - Enlisted)
  • Automotive Maintenance Warrant Officer (Army - Warrant Officer only)
  • Aviation Electrician's Mate (Navy - Enlisted)
  • Cannon Crewmember (Army - Enlisted)
  • Cavalry Scout (Army - Enlisted)
  • Combat Engineer (Army - Enlisted)
  • Construction Electrician (Navy - Enlisted)
  • Construction Engineering Technician (Army - Warrant Officer only)
  • CWO - Aviation Maintenance Technician (Navy - Warrant Officer only)
  • CWO - Electronics Technician, Surface (Navy - Warrant Officer only)
  • Electrical Power Production (Air Force - Enlisted)
  • Electrical Power Production Apprentice (Air Force - Enlisted)
  • Electrical Power Production Craftsman (Air Force - Enlisted)
  • Electrical Power Production Helper (Air Force - Enlisted)
  • Electrical Power Production Journeyman (Air Force - Enlisted)
  • Electrical Systems (Air Force - Enlisted)
  • Electrical Systems Apprentice (Air Force - Enlisted)
  • Electrical Systems Craftsman (Air Force - Enlisted)
  • Electrical Systems Helper (Air Force - Enlisted)
  • Electrical Systems Journeyman (Air Force - Enlisted)
  • Electrician (Marine Corps - Enlisted)
  • Electrician's Mate (Navy - Enlisted)
  • Electricians Mate, Nuclear Power (Navy - Enlisted)
  • Electronics Technician, Nuclear Power (Navy - Enlisted)
  • Engineer Equipment Electrical Systems Technician (Marine Corps - Enlisted)
  • Engineer Equipment Maintenance Warrant Officer (Army - Warrant Officer only)
  • Gas Turbine Electrical Systems Maintainer (Navy - Enlisted)
  • Gas Turbine Electrical Systems Technician (Navy - Enlisted)
  • Gas Turbine System Technician (Electrical) (Navy - Enlisted)
  • LDO - Electronics, Surface (Navy - Commissioned Officer only)
  • Marine Engineering Officer (Army - Warrant Officer only)
  • Mobile Facility Technician (Marine Corps - Enlisted)
  • Planning Series - Advanced Integrated Low Pressure Electrolyzer Equipment Technician (Navy - Enlisted)
  • Prime Power Production Specialist (Army - Enlisted)
  • Senior Automotive Maintenance Warrant Officer/Senior Ordnance Logistics Warrant Officer (Army - Warrant Officer only)
  • SSN 774 Integrated Low Pressure Electolyzer Equipment Technician (Navy - Enlisted)
  • Submarine Reactor Controls Operator (Navy - Enlisted)
  • Surface Reactor Controls Operator (Navy - Enlisted)
  • Tactical Power Generation Specialist (Army - Enlisted)
  • Turbine Engine Driven Generator Repairer (Army - Enlisted)
  • Unit Supply Specialist (Army - Enlisted)
  • Wheeled Vehicle Repairer (Army - Enlisted)

Apprenticeship Crosswalk Titles

  • Corrosion-Control Fitter
  • Electrician, Powerhouse
  • Electrician, Substation
  • Relay Technician

DOT Crosswalk Titles

  • Corrosion-Control Fitter
  • Electrician Apprentice, Powerhouse
  • Electrician, Powerhouse
  • Electrician, Substation
  • Relay Technician