Installs substation protective relays, substation metering, substation interchange metering, substation current transformers, coupling capacitors, digital and analog telemetering, power line carrier transmitters/receivers, wave-traps and carrier tuning equipment, transfer trip carrier and tone equipment, fiber optic and metallic inner-panel cable, transducers, digital fault recorders, sequence of events recorders, telephones, substation local area networks (LANs), distribution automation communications circuits from the Demarc to internal equipment, and packet radio.