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The difference between fuses and circuit breakers in an electrical panel

DESIGN

July 14, 2022

Dianne Russel

The fuse and the circuit breaker are both devices whose role is to interrupt the current in case of overcurrent to protect the building and the appliances. However, they work differently and each has its own advantages and disadvantages. Let's take a look at them.

The fuse

The fuse is usually a ceramic or glass case containing a metal filament. This device melts under the effect of the too high temperature in case of overcurrent, thus interrupting the current flow to protect your equipment. Discover its advantages and disadvantages.

The advantages of the fuse

Fast current flow processing;

Inexpensive and easy to find device;

Interesting to protect sensitive electronic equipment.

The disadvantages of the fuse

Non-reusable device: it must be replaced when it has melted;

Replacement is sometimes complicated and requires specific knowledge in the field.

The circuit breaker

The circuit breaker operates by means of an electromagnet or metal strip that cuts off the power when the current reaches too high a level. The biggest advantage of this device is its practicality, since to restore power, you only need to turn the switch back on. Let's take a look at its advantages and disadvantages.

The advantages of the circuit breaker

Reusable and easy to reset device;

Safer device, especially for domestic use;

Prevent electric shocks in hazardous areas such as the kitchen or the bathroom.

The disadvantages of the circuit breaker

Rather high cost;

Very large element.

Fuse or circuit breaker: which one to choose?

In the end, the difference between the fuse and the circuit breaker lies in their operating principle.

The fuse is based on the principle of the Joule effect and melts directly in case of overcurrent. Because of its fast current flow, you will find it most often in electronic devices.

The circuit breaker, on the other hand, is based on electromechanical principles and automatically shuts off power in the event of an overcurrent condition. It is then simply reactivated by turning the switch back on to restore power, making this device a more attractive option for construction applications. Ultimately, your choice will depend on your intended use and we strongly recommend that you consult a professional before selecting an item.

Call on us!

At Erco, we take care of everything related to the electrical panel and the electrical entrance in residential buildings. Choosing us means entrusting your safety and comfort to qualified, serious and competent master electricians whose main objective is to satisfy you.

We offer our services in Laval, Montreal, the North Shore and the South Shore. You can contact us by phone, by email or fill out the online form for more information. We try to answer you as soon as possible. Our contact information: