An electrician is inspecting the safety features of a kitchen circuit that supplies a refrigerator with a metallic body.
a. (i) Explain why earthing is essential for an appliance having a metallic casing.
b. (ii) Describe the working principle of a fuse and how it safeguards the wiring when an excessive current flows.
c. (iii) State any two characteristics that a good fuse wire must possess.
d. (iv) Give one reason why the fuse is always connected in the live wire and never in the neutral wire.