Answer:
Fuse:
The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.
Earth Wire:
The earth wire is a safety wire that is needed to earth appliances with a metal case. This makes it safer to touch the appliance if it develops a fault. Each of the wires in a cable performs a specific function. The three pins in an electrical plug are connected to the three wires inside a cable.
Circuit breaker:
A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected.
Insulator:
Electricity does not travel easily through certain materials like special rubber, plastic, and glass. ... Insulating materials also keep electricity inside appliance cords. Rubber or plastic insulation around the cords keeps the electricity in the wires and prevents you from getting a shock.
