33 70 00 Electrical Utilities
33 74 00 Extra High Voltage (EHV) Switchgear and protection devices
33 74 13 Air EHV Circuit Breaker 33 74 16 Oil EHV Circuit Breaker 33 74 19 Gas EHV Circuit Breaker 33 74 30 EHV Disconnect Switch 33 74 36 EHV Utility Fuses 33 74 39 EHV Surge Arresters 33 74 40 EHV Rod Gap 33 74 43 EVH Shunt Reactors 33 74 43.13 EHV Shunt Reactor Banks 33 74 43.16 EHV Current Limiting Reactors