how to change circuit breaker


How to Change Circuit Breaker

Electricity is an integral part of our lives, powering our homes, offices, and various appliances. However, electrical systems can sometimes encounter problems, and one common issue is a tripped circuit breaker. When a circuit breaker trips, it cuts off the electrical flow to a specific area or appliance, ensuring safety. While it's relatively simple to reset a tripped circuit breaker, there are instances when you may need to replace it altogether. In this guide, we will walk you through the step-by-step process of changing a circuit breaker, ensuring that you do it safely and effectively.

Why would you need to change a circuit breaker?

There are a few situations that might warrant changing a circuit breaker:

1. Age and wear:

Over time, circuit breakers can wear out and become less reliable. Old and worn out circuit breakers may not trip when they should, posing a significant safety risk. If your circuit breaker is more than 10 years old, it may be time to consider replacing it.

2. Frequent tripping:

If your circuit breaker trips frequently, it may be a sign of an overloaded circuit. In such cases, replacing the breaker with one that has a higher amperage rating may be necessary.

3. Faulty circuit breaker:

Sometimes, a circuit breaker can become faulty due to electrical surges or other issues. A faulty circuit breaker can cause power outages or other electrical problems. Replacing the faulty breaker is crucial for maintaining a safe electrical system.

4. Upgrading electrical system:

If you are renovating your home or upgrading your electrical system, changing circuit breakers to match the new requirements is often necessary. Upgrading your circuit breakers will ensure that they can handle the increased electrical load.

Now that we understand why a circuit breaker may need to be changed, let's delve into the step-by-step process of replacing a circuit breaker.

Gathering the necessary tools and materials

Before you begin replacing a circuit breaker, it's important to have the right tools and materials on hand. Here are the items you will need:

- Screwdriver set: A set of screwdrivers with various sizes and types of heads.

- Voltage tester: This tool is essential for checking if the circuit is still live before you start working on it.

- Wire cutter/stripper: It enables you to cut and strip wires effectively while maintaining insulation integrity.

- New circuit breaker: Make sure you purchase a replacement that matches the amperage and type of the old breaker.

- Safety goggles and gloves: Protect your eyes and hands from any potential hazards.

Removing the old circuit breaker

Now that you have your tools ready, here's a step-by-step guide on how to change a circuit breaker:

1. Safety first:

Before you begin any electrical work, safety should be your top priority. Turn off the main circuit breaker in your electrical panel to cut off power to the entire house.

2. Identify the faulty breaker:

Next, identify the circuit breaker that you need to change. They are typically labeled, indicating the area or appliance they supply power to. If there are no labels, you may need help from someone familiar with your electrical system to identify the correct breaker.

3. Test for voltage:

Using a voltage tester, check the wires connected to the circuit breaker to ensure there is no electrical current flowing through them. This step is essential to avoid electric shocks or accidents.

4. Removing the wires:

Once you have confirmed that there is no voltage present, you can proceed to remove the wires connected to the circuit breaker. Use your screwdriver to loosen the terminal screws and carefully detach the wires.

5. Unfasten the circuit breaker:

Each circuit breaker is typically secured in the electrical panel with one or two screws. Remove these screws using an appropriate screwdriver and gently slide the breaker out of the panel.

Installing the new circuit breaker

With the old circuit breaker safely removed, it's time to replace it with a new one. Follow these steps:

1. Match the new breaker:

Ensure that the replacement circuit breaker you have is an exact match for the old one in terms of amperage rating and type. Installing the wrong breaker can cause electrical problems and compromise safety.

2. Insert the new breaker:

Carefully align the new circuit breaker with the empty slot in the electrical panel. Slide it into place until it is firmly seated. Make sure the breaker is oriented in the same direction as the previous one.

3. Secure the new breaker:

Tighten the screws provided with the circuit breaker to secure it in place. Ensure that it is securely fastened to maintain proper contact and functionality.

4. Reconnect the wires:

Refer to the notes you made or the labeled wires to reconnect them to the appropriate terminals on the new circuit breaker. Use your screwdriver to tighten the terminal screws and ensure a secure connection.

5. Test the circuit:

Now that everything is set up, turn the main circuit breaker back on. Use a voltage tester to check if the circuit is functioning correctly. If all is well, you have successfully changed the circuit breaker.


Changing a circuit breaker may seem like a daunting task at first, but by following the step-by-step process outlined above, you can do it safely and effectively. Remember always to prioritize safety, turn off the main circuit breaker, and use the necessary tools and equipment. Whether you are dealing with an old or faulty circuit breaker or upgrading your electrical system, replacing circuit breakers is a fundamental skill for any homeowner. If you are unsure about any step or lack experience in electrical work, it's recommended to seek assistance from a professional electrician. By taking the necessary precautions and following the guidelines, you can maintain a reliable and safe electrical system in your home.


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