33 70 00 Electrical Utilities
33 77 00 Medium-Voltage Utility Switchgear and Protection Devices
33 77 13 Air Medium-Voltage Circuit Breaker 33 77 16 Oil Medium-Voltage Circuit Breaker 33 77 19 Gas Medium-Voltage Circuit Breaker 33 77 23 Vacuum Medium-Voltage Circuit Breaker 33 77 26 Medium-Voltage Utility Fusible Interrupter Switchgear 33 77 30 Medium-Voltage Disconnect Switch 33 77 33 Medium-Voltage Utility Cutouts 33 77 36 Medium-Voltage Utility Fuses 33 77 39 Medium-Voltage Utility Surge Arresters 33 77 40 Medium-Voltage Rod Gap 33 77 53 Medium-Voltage Utility Reclosers