What does a fuse or circuit breaker do when too much electricity flows through circuit?

When too much electricity flows through a circuit, a fuse or circuit breaker acts as a safety device to prevent damage to the electrical system and potential electrical fires. Here's how a fuse or circuit breaker works in such a situation:

1. Fuse:

- A fuse is a thin strip of metal designed to melt and break the circuit when excessive current flows through it.

- When the current exceeds the fuse's rated capacity, the metal strip heats up and melts, creating a gap in the circuit.

- This effectively interrupts the flow of electricity and prevents further damage to the circuit.

2. Circuit Breaker:

- A circuit breaker is a reusable safety device that automatically switches off the circuit when it detects an overcurrent condition.

- It contains a bimetallic strip that bends when excessive current flows through it.

- The bending of the bimetallic strip trips a mechanism that disconnects the circuit, stopping the flow of electricity.

- Unlike a fuse, a circuit breaker can be reset after the fault is cleared, allowing the circuit to be restored.

Both fuses and circuit breakers are essential safety components in electrical circuits. They protect against electrical overloads, short circuits, and ground faults, preventing potential hazards and ensuring the safe operation of electrical devices.