33 71 00 Electrical Utility Transmission and Distribution
33 71 13 Electrical Utility Towers
33 71 13 Electrical Utility Towers 33 71 13.13 Precast Concrete Electrical Utility Towers 33 71 13.23 Steel Electrical Utility Towers 33 71 13.33 Wood Electrical Utility Towers 33 71 16 Electrical Poles 33 71 16.13 Precast Concrete Electrical Utility Poles 33 71 16.23 Steel Electrical Utility Poles 33 71 16.33 Wood Electrical Utility Poles 33 71 19 Electrical Underground Ducts, Ductbanks,And Manholes 33 71 19.13 Electrical Manholes and Handholes 33 71 19.23 Trenched Electrical Underground Duct and Ductbanks 33 71 19.33 Trenchless Electrical Underground Duct and Ductbanks 33 71 23 Insulators and Fittings 33 71 23.13 Suspension Insulators 33 71 23.16 Post Insulators 33 71 23.23 Potheads 33 71 26 Transmission and Distribution Equipment 33 71 26.13 Capacitor Banks 33 71 26.16 Coupling Capacitors 33 71 26.23 Current Transformers 33 71 26.26 Potential Transformers 33 71 36 Extra-High-Voltage Transmission Wiring 33 71 36.13 Overhead Extra-High-Voltage Transmission Wiring 33 71 39 High-Voltage Transmission Wiring 33 71 39.13 Overhead High-Voltage Transmission Wiring 33 71 39.23 Underground High-Voltage Transmission Wiring 33 71 39.33 Underwater High-Voltage Transmission Wiring 33 71 49 Medium-Voltage Transmission Wiring 33 71 49.13 Overhead Medium-Voltage Transmission Wiring 33 71 49.23 Underground Medium-Voltage Transmission Wiring 33 71 49.33 Underwater Medium-Voltage Transmission Wiring 33 71 53 Direct-Current Transmission 33 71 73 Electrical Utility Services 33 71 83 Transmission and Distribution Specialties