How does a fuse safeguard electrical appliances?

A fuse safeguards electrical appliances by interrupting the flow of excessive current during abnormal conditions.

When the current exceeds the safe limit due to overloading or a short circuit, the fuse wire heats up rapidly and melts because of its low melting point. This breaks the circuit and stops the current flow immediately.

By doing so, the fuse:

• Prevents overheating of wires and components
• Protects appliances from damage
• Reduces the risk of electrical fires

In essence, a fuse acts as a first line of defense, ensuring that excess current does not reach and damage connected devices.