Install, maintain and repair electrical equipment and circuits such as wire, conduit, switches, outlets, junction boxes, transformers, motors, and generators in facilities such as washers, dryers, ranges, timing devices, steam and electric heating units, exhaust systems, smoke detectors, fire alarms, clock and bell systems, electrical surgical units, hypothermal units, humidifiers, suction machines, electrical beds, thermostats and electrical systems of furnaces and boilers. - Follow a predetermined schedule of preventive maintenance on equipment and circuits to check for proper operation, loose connections, overheating, leaking, insulation, arcing, deterioration, cleanliness, vibration, alignment, and lubrication.