How to Change a Fuse

Dec 25, 2023

Welcome to, your trusted source for lighting fixtures, equipment, and professional electricians. In this comprehensive guide, we will walk you through the process of changing a fuse step-by-step. By following our instructions, you'll be able to confidently handle potential electrical issues and ensure the safety of your home or business.

Understanding the Basics

Before we dive into the step-by-step instructions, it's important to have a basic understanding of fuses and their purpose. Fuses are devices designed to protect electrical circuits from overloading or short-circuiting. They contain a thin wire element that melts when excessive current passes through it, thereby interrupting the flow of electricity and preventing damage to the circuit.

Gathering the Necessary Tools

Before you begin, make sure you have the following tools ready:

  • Screwdriver (flathead or Phillips, depending on the fuse box type)
  • Replacement fuse of the same amperage rating
  • Small flashlight
  • Rubber gloves (for added safety)

Step-by-Step Instructions

Step 1: Safety First

Prioritize your safety by switching off the power supply to the specific circuit you're working on. Locate your main electrical panel or fuse box, usually found in the basement, garage, or utility room.

If you're unsure which breaker or fuse controls the circuit, consider shutting off the main power switch to avoid any potential hazards. Always exercise caution when working with electricity.

Step 2: Locate the Fuse Box

Open the fuse box cover carefully. Inside, you'll find rows or groups of fuses, each protecting a specific circuit. Look for the fuse corresponding to the circuit you need to address. Fuses are typically labeled or numbered for easier identification.

Step 3: Assess the Fuse

Inspect the fuse to determine if it's blown or faulty. A blown fuse usually has a broken filament or a visibly charred appearance. If you're uncertain, compare the suspected fuse with a known working fuse of the same type and amperage rating.

Step 4: Remove the Blown Fuse

Using a screwdriver, gently loosen the fuse by turning it counterclockwise. Be careful not to apply excessive force or damage the fuse box. Once loose, remove the blown fuse from its socket.

Step 5: Replace with a New Fuse

Take a new fuse of the same type and amperage rating. Align it with the empty socket and insert it firmly. Make sure the fuse sits securely in place.

Step 6: Restore Power and Test

With the new fuse in place, carefully close the fuse box cover. Restore power to the circuit by turning on the corresponding breaker or switch. Test the circuit to ensure the issue has been resolved.

When to Call a Professional

While changing a fuse is a relatively simple task for minor electrical issues, there are instances where it's best to consult a professional electrician, such as:

  • Recurring blown fuses
  • Burnt or charred wiring
  • Fuse box malfunction
  • Any signs of electrical hazards

If you encounter any of these situations, it's crucial to prioritize your safety and seek expert assistance to identify and address the underlying problem.


Congratulations! You have successfully learned how to change a fuse. By following our detailed guide, you can confidently handle minor electrical issues and ensure the smooth operation of your electrical circuits. Remember to always prioritize your safety and consult a professional when dealing with more complex or potentially hazardous situations.

For all your lighting fixtures, equipment, and electrical needs, trust Our team of expert electricians is ready to assist you with any electrical project or concern. Contact us today to learn more about our services and schedule an appointment.