Fuses, Earthing and Circuit Breakers
 

Fuses, Earthing and Circuit Breakers problem 17


A microwave oven has a metal case and is connected to a electricity supply. The microwave oven is fitted with a fuse and an earth wire is connected to the metal case of the microwave oven. A fault occurs and the live wire of the microwave oven touches the metal case. Explain how the fuse and an earthed metal case protect the appliance and the user.


 

main author and content editor: Adebola Oluwadare