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What is the difference between a fuse and a circuit breaker?

Protecting your electrical devices, along with your own protection, is essential when it comes to the electrics within your home. There are differences when it comes to fuse and circuit breakers, ranging from application, operation principles, cost, and reusability. The main different is in the application.

What Are Circuit Breakers?

Circuit breakers are electrical switches and reduce the risk of overloading and short-circuiting. They are in an “on” position, allowing electricity to pass normally. They are required when doing new wiring in homes.

They are installed to serve numerous devices. When the power load exceeds the requirements, the device is disconnected, by tripping the power. These come with a rating, with smaller ones protecting individual devices, and larger ones protecting entire homes.

What Are Fuses?

Fuses are inserted between two power terminals, supplying your home with power. It is a piece of wire that melts easily when something goes wrong. Ideally, the fuse wire melts and disconnects the power, avoiding the risk of damaging your appliances or devices. This occurs when the power supply exceeds what is needed by the device. The fuse allows the power to flow normally until an overload, in which case the wire melts, and power is disconnected.

Fuses have a thin wire, enclosed in glass, ceramic, or metal. A central fuse can protect your entire home. Fuses cannot be reused once they blow. They need to be replaced. You must replace the fuse with the proper rating based on your electricity needs. 

What is the Difference Between a Fuse and a Circuit Breaker?

The main difference between the two is that circuit breakers function, mechanically disconnecting the connection when the power exceeds supply. This reduces the risk of electrical fires. Fuses prevent a device from spoiling, in the event the incoming power exceeds the requirement.

Reusable

Once a fuse blows, it cannot be reused. Circuit breakers, on the other hand, trip and disconnect the power. Once you have disconnected the appliance or device, you can flip the switch back to the “on” position, restoring the power.

Operation

Circuit breakers switch off the connection, where fuses use conducting materials to turn off the power when the power exceeds requirements. Circuit breakers are manual and mechanical, while fuses are automatic.

Response Times

Fuses can take 0.002 seconds to respond to excess power, while circuit breakers take anywhere up to 0.05 seconds.

Protection

Fuses protect your home and appliances from power overloads, while circuit breakers protect your home and appliances from power overloads and short circuits. 

Application

A circuit breaker is used to protect your entire home, rather than focusing on individual appliances or devices, where fuses protect individual appliances and devices, rather than your entire home. 

Conclusion

Fuses cannot be reused, while circuit breakers can be used time and time again. Circuit breakers protect your entire home and appliances from overloading and short circuiting, while fuses protect devices and homes against overloading. While fuses are not illegal in the UK, they are considered outdated technology, and you will not see fuses in newer homes. If your home is still working on an old and outdated fuse box, contact DKP Electrics today to discuss the benefits of changing over to a circuit breaker, protecting your home, devices, appliances, and family.

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