Perform basic electrical work such as measuring, cutting, and installing conduit using clamps, connectors, and other fittings as required; pull wiring through the conduit; cut and connect wires to install fixtures such as switches, outlets, lighting fixtures and power equipment; test circuits and components; maintain and repair parking lot lights by replacing defective fuses, bulbs, wires, photoelectric timers and transformers; adjust and clean electric controls; troubleshoot and install new parts in defective appliances. Monitor, service, and make basic repairs to boilers, oil and gas furnaces, and air conditioning systems such as cleaning boilers, testing water content, and adding water treatment; add refrigerant to air conditioning systems; and replace fuses, compressors, filter/dryers, air handler motors and thermostats to maintain systems in proper working order.