Paper 2 - Electrical Uses PAPER 2 Electrical Uses UNIT 5. Installation & Maintenance of Domestic Appliances Installation & Maintenance of Domestic Appliances Principle/Working MechanismDomestic appliances convert electrical energy into:Heat (Heat pumps, cookers)Motion (Fans, pumps)Cooling (Refrigerators)Signaling (Bells, alarms)Key Concepts:Power Rating (Watts)Voltage (230V AC)Efficiency (Energy Star ratings) Types/Classifications Heaters & CookersTypePowerSymbolEfficiencyImmersion Heater1-3kW 95%Induction Cooktop2-5kW 85%Microwave0.8-1.5kW 65% RefrigeratorsTypeCooling TechPowerSingle-DoorCompressor100-200WDouble-DoorInverter200-400W    Small MotorsApplianceMotor TypeSymbolCeiling FanInduction Water PumpCapacitor-Run Elevator3-Phase AC Explanation of...