Repair, test, and calibrate central control consoles, including: Line balancing systems, Voltage sensing relays, Emergency power transfer relays, Supervisory trouble alarm circuits, Excelsior registers, Circuit monitoring relays, Maintain, install, modify, add, repair, troubleshoot, and test building electrical systems such as: Distribution panels, circuit breakers, power supplies, Switches and outlets, lighting fixtures, lamps, fans, Heating devices, appliances, buzzer and bell circuits, Temperature and pressure controls and regulators. Use and maintain a wide variety of tools and test equipment, including cable pullers, hydraulic benders, pipe threading machines, meggers, multi-meters, frequency meters, watt meters, power factor meters, vibro-grounds, phase rotation meters, audio tone location equipment, high potential testers, ground fault interrupter testers, circuit analyzers, etc.