US Department of Defense - - Responsibilities: Install, maintain, and repair electrical power and lighting lines and cables and associated parts of circuits.; Install, maintain, and repair electrical motors, wiring, and various manual and automatic controls of furnaces and other electronic machinery.; Disassemble electrical equipment, trace circuits and locate defects, clean and replace parts, renew wiring, brushes, electrical connections and insulating parts as necessary.; Test equipment for proper operation, safety, and accuracy.; Interpret and apply building plans and blueprints.