How does a circuit breaker work? – Explained

A circuit breaker is an essential safety device in the home. It plays a major role to keep everyone safe at home by reducing or eliminating the chances of electrical damages. The work of circuit breakers is to connect wiring of each circuit to supply power to the home.

Once a circuit breaker notices that circuit is drawing too much amperage, it will respond by shutting off all power to the circuit which some knows as trip off. Before we go straight to how a circuit breaker works, let’s check some reasons you need to use a circuit breaker.

How circuit breaker Works

Why you need a circuit breaker

Electricity is being supplied from a power company (power plant) to your house. A circuit breaker in your home serves as security that screens the current filters and sends the right amount to the necessary quarters.

In a simple way for you to understand why you need a circuit breaker. Take a circuit breaker as a gate security officer. The officer has been instructed only to allow a certain number of people into the house. Once the number is met, the gate has to be shut down.

Such an act is to regulate the numbers of people that come into the house and also control the crowd. A circuit breaker takes in power into the house and sends it to necessary quarters. It can be known or called a power regulator.

If not for a circuit breaker in your home, you are likely to frequently experience electricity hazards whenever any power surge or overloading occurs. So, the main reason you need a circuit breaker in your home is to keep your home and the household members safe from any electrical hazard.

How does a circuit breaker work?

You are likely never going to know how a circuit breaker works if you don’t know the necessary and parts of the circuits.

A circuit breaker consists of:

  • Pairs of connectors
  • Something to force them apart if an electrical failure occurs
  • A switch
  • Something to suppress problems

In your circuit breaker, there you have two connectors. One is known as live and the other as neutral, and they are both tripped together. And to the force that pulls apart, you can only find two common types known as magnetic and thermal magnetic.

The responsibility is to pull contact apart when it notices that the current passing through is higher and can use electrical damages. The magnetic uses a solenoid, which helps to pull the connectors apart until the switch is pulled off.

So, in a nutshell, a circuit breaker receives power from electricity source to your home, then controls and regulates the current to ensure that electricity damages don’t occur, such as preventing overloading and higher currents.


This post on how does a circuit breaker work shows you all that you need to know about a circuit breaker. Surprisingly, many homes have a circuit breaker because it is an indispensable device, but only a few people know the importance of the circuit breaker.

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