33 71 00 Electrical Utility Transmission and Distribution
33 71 49.23 Underground Medium-Voltage Transmission Wiring
33 71 13Electrical Utility Towers33 71 13.13Precast Concrete Electrical Utility Towers33 71 13.23Steel Electrical Utility Towers33 71 13.33Wood Electrical Utility Towers33 71 16Electrical Poles33 71 16.13Precast Concrete Electrical Utility Poles33 71 16.23Steel Electrical Utility Poles33 71 16.33Wood Electrical Utility Poles33 71 19Electrical Underground Ducts, Ductbanks,And Manholes33 71 19.13Electrical Manholes and Handholes33 71 19.23Trenched Electrical Underground Duct and Ductbanks33 71 19.33Trenchless Electrical Underground Duct and Ductbanks33 71 23Insulators and Fittings33 71 23.13Suspension Insulators33 71 23.16Post Insulators33 71 23.23Potheads33 71 26Transmission and Distribution Equipment33 71 26.13Capacitor Banks33 71 26.16Coupling Capacitors33 71 26.23Current Transformers33 71 26.26Potential Transformers33 71 36Extra-High-Voltage Transmission Wiring33 71 36.13Overhead Extra-High-Voltage Transmission Wiring33 71 39High-Voltage Transmission Wiring33 71 39.13Overhead High-Voltage Transmission Wiring33 71 39.23Underground High-Voltage Transmission Wiring33 71 39.33Underwater High-Voltage Transmission Wiring33 71 49Medium-Voltage Transmission Wiring33 71 49.13Overhead Medium-Voltage Transmission Wiring33 71 49.23Underground Medium-Voltage Transmission Wiring33 71 49.33Underwater Medium-Voltage Transmission Wiring33 71 53Direct-Current Transmission33 71 73Electrical Utility Services33 71 83Transmission and Distribution Specialties