How to Change a Fuse in a Fuse Box - A Step-by-Step Guide

Feb 9, 2024


Welcome to, your trusted source for information, tips, and guidance on all things related to lighting fixtures & equipment and electricians. In this comprehensive guide, we will walk you through the process of changing a fuse in a fuse box. Whether you are a homeowner, a renter, or a business owner, this knowledge will come in handy whenever you encounter a blown fuse.

The Basics: Understanding Your Fuse Box

Before we delve into the actual process of changing a fuse, let's take a moment to understand the basics. A fuse box, also known as a consumer unit, serves as the central control point for electrical systems in residential and commercial properties. It contains fuses that protect electrical circuits from overloading and short-circuiting. Each fuse corresponds to a specific electrical circuit in the building.

Identifying a Blown Fuse

If you experience a sudden loss of power to a specific area or appliance, the first thing to check is whether a fuse has blown. The signs of a blown fuse vary, but common indicators include:

  • No power or lights in the affected area
  • The fuse wire inside the fuse appears black or broken
  • An accompanying burning smell or visible scorch marks

Step-by-Step Guide: Changing a Fuse

Now that you know the signs of a blown fuse, let's proceed with the step-by-step process of changing it:

Step 1: Safety First

Before working on any electrical components, safety should always be your top priority. Make sure to:

  • Switch off the power supply to the affected circuit
  • Wear insulated gloves and safety goggles
  • Ensure a well-lit working area

Step 2: Locate the Fuse Box

In most residential properties, the fuse box is located in a utility room, basement, or garage. Once you find it, open the cover to reveal the fuses and their corresponding labels.

Step 3: Identify the Blown Fuse

Inspect the fuse box and look for any fuses that have blackened wires or appear broken. Refer to the labels to identify the specific circuit the blown fuse corresponds to.

Step 4: Remove the Blown Fuse

Using a fuse puller or a pair of insulated pliers, carefully grip the blown fuse and gently pull it out. Be cautious not to exert excessive force or damage the fuse box.

Step 5: Replace with a New Fuse

Obtain a replacement fuse of the same rating as the blown one. Align the new fuse with the socket and firmly push it in until it is securely seated.

Step 6: Test the Circuit

Now it's time to restore power and test the circuit. Turn the power supply back on and check if the affected area or appliance now functions properly. If not, you may want to seek professional assistance from an electrician.

Contact for Professional Assistance

While changing a fuse is a relatively simple task, electrical systems can be complex, and safety should always be a priority. If you are unsure or uncomfortable with any aspect of the process, it is best to seek professional help. At, we offer expert electricians who can diagnose and address all your electrical needs.


Congratulations! You now have the knowledge and confidence to change a fuse in a fuse box. Remember, safety should always be your priority, and if you have any doubts, it is better to consult a professional. is your go-to resource for all things related to lighting fixtures & equipment and electricians. Feel free to explore our website for more helpful guides, tips, and services tailored to meet your electrical needs.

how to change a fuse in a fuse box