Blog

When a circuit breaker trips, it protects your device and circuit; it’s just doing its job unless it is damaged.

Do you notice that sometimes the lights of a residential place go off due to circuit breaker tripping, or sometimes the fuse blows up? It is due to some faults in the electrical network. I see these faults too much because I work as an electrical maintenance engineer.

I will discuss different reasons that cause circuit breaker tripping. I won’t rely only on my long work experience as an engineer, which is now about 15 years, but also I will provide you with the results of deep searching about circuit breaker tripping.

How To Find The Reason Behind Tripping My Circuit Breaker?

What would cause a circuit breaker to keep tripping?

Now, after this quick discussion for non-technical persons. let’s move to the electrical engineering discussion.

Overloaded Circuit:

One of the main reasons for circuit breaker tripping is the overloaded circuit in the electrical system. When many loads are connected to the circuit, the circuit attempts to draw a greater electrical load than its rated value. Due to this, the circuit breaker heats up, and the breaker tripping occurs.

Electrical Short Circuit:

Another reason for the breaker tripping is the electrical short circuit. A short circuit occurs due to low insulation resistance.

When the positive and negative (live and neutral) terminal connects with each other in the absence of any resistance. This causes an unimpeded flow of electricity. A large amount of current flows through a breaker that causes tripping.

It is worth mentioning here how to decide whether the tripping occurs due to a short circuit. The answer is clear and simple. If a circuit breaker trips instantly again and again after you reset it, the tripping occurs due to a short circuit.

How Do I Know That I Have a Short Circuit at the House? If you find fuses being blown regularly or a circuit breaker tripping frequently, it might be a symptom of a short circuit.

A fuse will usually explode, or a circuit breaker will trip instantly. If a new fuse with the proper rating also blows, you’ve got a short circuit.

If a circuit breaker is reset and it trips again instantly, as you connect it, you have a short circuit or a broken circuit breaker. Read my detailed article about Electrical short circuits, why is it dangerous?

Ground Fault:

Another reason that causes the circuit breaker tripping is the ground fault. A ground fault is a type of short circuit when a hot wire comes in contact with the ground or any other type of metal.

The ground fault causes an increase in the flow of current. It causes the circuit breaker to heat up and as a result, circuit breaker tripping occurs.

Some ground faults are not detectable by normal MCB. So it’s recommended to use GFCI (ground fault circuit interrupter) This is better for human safety as this breaker can detect small milli-amperes and trips before a shock happens. Read my article on my other site: Surge Protectors and GFCI Outlets: Can They Safely Coexist?

Arc Fault:

When fluctuation or sparking occurs between two-wire connections at a point. Arc faults occur.

Sometimes the screws at a point become loose, In this case, AFCI (arc fault circuit interrupter) is recommended.

While the circuit breaker is an Arc fault interpreter (AFCI ). It detects the early wiring problem and trips in advance to stop the flow of a large amount of current.

Bad Circuit Breaker:

Sometimes the circuit and loads are all OK and in good condition. But the breaker keeps tripping randomly.

This is a sign that the circuit breaker is bad. Like any device, breakers have a lifetime, and then breakers go bad. And it’s time to replace it.

Can a circuit breaker trip for no reason?

A breaker will trip for no reason if it malfunctions. A breaker will trip when a short circuit occurs on an electrical circuit, causing sparks, popping sounds, or smoke to be produced.

A loose connection, slipping wire, or even damage from animals chewing on cables could cause this.

If you didn’t find any faults like a short circuit, overload, or lost connection, your circuit breaker might be old and unable to carry current anymore.

In other words, it has become bad. It would be best if you replaced it for the circuit to continue operating.

Why is the circuit breaker tripping without load?

If your circuit breaker trips without loads, a wire with damaged insulation somewhere in the electrical panel or in power outlets can be the cause of breaker tripping and will continue to do so until you fix it.

A general wiring issue can potentially be the reason why a circuit breaker trips. You can have obsolete wiring if your home is older.

The issue with older electrical systems is that new technology and appliances frequently demand more power than previous systems can safely handle.

The older wiring can’t keep up with the increasing demands as our daily energy needs increase. This may be the problem if several breakers are often tripping without a load. Otherwise, there can be a problem with the breaker panel itself.

When your breaker trips without any load being present, you should take into consideration the following three wiring problems:

Current Leakage: One possibility is that one or more of the input wires have current leakage, which causes the circuit breaker to trip even when there isn’t a load attached to it. If so, your annoying issue is taking place for your own benefit. tripping is a precaution for the safety of your all-electrical devices.

Damaged Wires: Not simply the input cables might be damaged; it could happen everywhere. They could have been accessed by pests or insects that, only by gnawing, caused significant harm. This kind of issue may be sufficient to trigger a breaker trip even with no loads.

A Loose Wire in an Outlet: This loose wiring issue may be pretty frustrating. In other words, a loose wire in one of your outlets will keep your breaker continuously tripping. If you have a GFCI outlet, this is a very typical issue (Ground-Fault Circuit Interrupter).

Why shouldn’t you reset a tripped circuit breaker immediately?

The straightforward answer is that you shouldn’t reset a circuit breaker unless you are sure of the reason for the fault and that it poses no danger.

Note that if you reset it immediately it may trip again in case it is still hot, even if the fault is cleared.

Circuit breakers are there to safeguard your family, your house, and yourself. When a circuit breaker trips, it indicates that a current greater than the trip current is passing through it.

In case of a faulty circuit or wires, or a short circuit, the circuit breaker will trip again immediately if you reset it.

The short circuit current makes the circuit breaker get hot and trip, it should be cooled before you reset it.

Can a tripped breaker stop a fire?

Yes, if tripping happen before the fire catch wires or panel. But it won’t if tripping happens after the fire catch wires or panel.

There can be two scenarios, 1^st one is before the wiring or breaker panel catches fire.

And 2^nd is the role of the circuit breaker after catching fire let’s explore both scenarios in detail below:

Role of circuit breaker before Catch Fire:

Tripped circuit breakers can prevent fire and protect electrical systems against overloads and short circuits, circuit breakers assure electrical safety in homes, offices, and other buildings as well as for industrial uses.

The circuit breaker instantly shuts off the electrical circuit when a problem is found, protecting the wires and reducing the chance of catching fire.

Role of circuit breaker after catching fire:

Tripped circuit breakers didn’t play any role and could not provide safety to the system after catching fire.

If the circuit breaker is not tripped due to any reason or sometimes the fault current is too much bigger than the rating of the cable, then the circuit breaker wiring or panel box catches fire.

Can tripping circuit breaker damage your devices?

Tripping circuit breakers themselves do not typically cause direct damage to your electrical devices.

In fact, the primary purpose of a circuit breaker is to protect your devices and electrical system from potential damage due to electrical overloads or short circuits.

When a circuit is overloaded or a short circuit occurs, the circuit breaker is designed to trip and cut off the flow of electricity, preventing excessive current from damaging your devices and wiring.

However, frequent or repetitive tripping of circuit breakers may indicate underlying issues within the electrical system that could potentially affect connected devices. Repeated tripping may point to problems such as overloading, short circuits, ground faults, or other electrical faults that could impact the functionality and safety of your devices.

Indirectly, sudden loss of power due to a tripped circuit breaker can cause data loss or corruption in electronic devices like computers, especially if they are not connected to an uninterruptible power supply (UPS). Additionally, frequent power fluctuations resulting from faulty electrical systems can gradually wear down sensitive electronic components, reducing the lifespan of your devices over time.

To prevent potential damage to your devices, it’s important to address any electrical issues promptly. If you notice persistent circuit breaker trips, it’s advisable to consult a qualified electrician to identify the underlying cause and ensure that your electrical system is functioning safely and efficiently. Taking proactive steps to maintain your electrical system can help prevent potential damage to your devices and ensure the safety of your property.

Why is the Main circuit breaker tripping?

The main breaker can trip for a variety of reasons. Whether it be a lightning strike, a power surge from the utility company, or an overload to the electrical panel, the main breaker can be tripped due to any of these factors.

Furthermore, the main circuit breakers can trip simply because they’re worn out. There might be a situation when a branch circuit breaker fails and is no longer capable of tripping as designed, which may result in the main breaker tripping to provide secondary safety shutoffs in the event that the individual circuit breaker fails. 

Furthermore, If the total load demand becomes too much or if there is any significant issue with the electrical system, the main breaker cuts off electricity to the entire house.

These issues often entail brief power spikes, although it may be necessary to detect system issues occasionally.

The main circuit breaker “tripping” is somewhat uncommon since often, individual circuit breakers trip long before the main breaker has to shut down.

Does weather affect the circuit breaker?

Yes, weather affects the circuit breakers. In response to the heat generated by the circuit breaker, the bimetallic strip inside the breaker flexes and trips the breaker.

The hot weather also can cause a breaker to trip, it all depends on the thermal effect of heat that causes the bimetallic strip inside the breaker to flex and trip it.

On the other hand, as compared to hot weather, cold weather didn’t affect the circuit breaker as much as lead to tripping, but if there is a foggy season and too much moisture in the environment, that can cause tripping the breaker.

A breaker’s components can also be adversely affected by the ambient heat in the air surrounding the breaker. A circuit breaker should typically not be heated over 140°F. If it happens, it indicates a potential trip of the circuit breaker.

If you can’t keep your finger on the plastic portion of the circuit breaker without being burnt, it’s too hot, according to a reliable “rule of thumb.”

Why do my breakers trip when it rains?

The main cause of a breaker’s trip after the storm is a short circuit brought on by water.

Due to heavy rain, the electrical wire isolation may deteriorate after water exposure, causing a short circuit. Improper panel box installation might be another reason your circuit breaker tripped during the storm.

Rainwater may get into your circuit in a number of ways if the main line is not installed properly.

Water may enter your wiring conduits through the wire leading to the meter and electrical circuit. It’s also conceivable that the conduit or hose you used to install your main line will let water through.

Because of this, if the breaker box is in the basement, water may wet your circuit. The worst possible scenario for your house is a wet circuit breaker.

A wet circuit is dangerous because you might get electrocuted in addition to the electrical problems it can create.

Can you reset a breaker in the rain?

It is generally not recommended to reset a circuit breaker while it is raining or in wet conditions. Water can significantly increase the risk of electrical hazards, potentially leading to electric shocks or other safety risks.

Resetting a circuit breaker in the rain could expose you to electrical currents and pose a danger to your safety.

To ensure your safety when dealing with electrical components, including circuit breakers, it’s crucial to follow these guidelines:

1. Safety First: Prioritize your safety at all times. Do not attempt to handle electrical components in wet conditions or when you are standing on a wet surface.
2. Turn Off the Main Power: If you need to access the circuit breaker panel during wet conditions, make sure to turn off the main power to the house or the affected circuit before attempting any reset.
3. Wait for Dry Conditions: If the circuit breaker trips during the rain, it is advisable to wait until the weather improves and the area is dry before attempting to reset it.
4. Take Precautionary Measures: If you must work on electrical components in damp conditions, wear appropriate personal protective equipment (PPE) such as rubber gloves, rubber-soled shoes, and other safety gear to minimize the risk of electrical shock.

If you are unsure about how to safely handle a circuit breaker or if you are uncomfortable with electrical work, it is best to seek assistance from a qualified electrician.

Professional electricians have the necessary expertise and equipment to handle electrical components safely, even in adverse weather conditions.

Prioritizing safety is essential to prevent accidents and ensure the protection of both you and your property.

Can a storm and lightning cause a CB to trip?

Yes, storms and lightning can potentially cause a circuit breaker to trip. Lightning strikes can induce power surges in electrical systems, leading to a sudden increase in electrical current that exceeds the circuit breaker’s capacity.

In response to the excessive current, the circuit breaker will trip, cutting off the power supply to the affected circuit or the entire house to prevent electrical damage or fire hazards.

Additionally, storms can cause power fluctuations and electrical disturbances, which might impact the stability of the electrical supply. These fluctuations can result in overloading or short circuits within the electrical system, leading to the tripping of the circuit breakers.

To protect your electrical system during storms and lightning, consider taking the following precautions:

1. Install Surge Protectors: Use surge protectors to safeguard sensitive electronic devices from power surges caused by lightning strikes or other electrical disturbances.
2. Unplug Electronic Devices: Unplug sensitive electronic devices during thunderstorms to prevent potential damage from power surges or lightning strikes.
3. Invest in Lightning Protection Systems: Consider installing lightning protection systems, such as lightning rods and surge arresters, to divert lightning strikes away from your property and protect your electrical system.
4. Maintain the Electrical System: Regularly inspect and maintain your electrical system to ensure that it is in good condition and capable of withstanding electrical disturbances caused by storms and lightning.

If you experience frequent circuit breaker trips during storms or if you suspect damage to your electrical system as a result of a lightning strike, it is advisable to seek the assistance of a licensed electrician.

A professional electrician can assess the condition of your electrical system, identify any potential issues, and implement necessary measures to safeguard your property from electrical hazards.

Will a breaker trip if wires touch each other?

Yes, a circuit breaker can trip if wires touch each other, especially if the wires create a short circuit.

When wires make direct contact or create a path with low resistance between the hot and neutral wires or between the hot wire and the ground, a short circuit occurs.

This causes a sudden increase in electrical current, exceeding the circuit breaker’s capacity and triggering it to trip.

The purpose of a circuit breaker is to protect the electrical system and connected devices from potential damage caused by overcurrent situations like short circuits. When the circuit breaker trips due to a short circuit, it interrupts the flow of electricity and prevents further damage to the wiring, appliances, and other electrical components.

To prevent wires from touching and causing a short circuit, it’s essential to follow proper wiring practices, including:

1. Using appropriate wire connectors and junction boxes to secure and protect wire connections.
2. Insulating exposed wires to prevent contact with other wires or conductive materials.
3. Maintaining proper wire spacing and organization to minimize the risk of accidental contact.

If you suspect that wires are touching or if you experience frequent circuit breaker trips, it’s essential to consult a licensed electrician to inspect your electrical system.

A professional electrician can identify any potential wiring issues, troubleshoot the cause of the tripping, and ensure the safety and functionality of your electrical system.

Can the circuit breaker trip if you hold it?

The circuit breaker standard UL489 requires circuit breakers to be “trip free”. A trip-free circuit breaker will still trip if you hold it in the ON position.

Yes, you can hold the toggle up, but that does not stop the breaker from tripping under an over-current condition.

A circuit breaker cannot be forced if it trips repeatedly; it will keep opening and burn out.

It is usually not harmful to have a momentary connection, as it will only last for a short time.

You will need to resolve the problem causing the trip and then you will need to replace the circuit breaker if it went bad.

Why is the circuit breaker not tripping?

The circuit breaker may not trip if it malfunctions due to (an entirely mechanical problem, or sustains partial or total damage ) Occasionally, a circuit breaker will not trip in circumstances of fault like a short circuit, or overload, indicating it is bad and must be replaced.

It is also possible for the cause of the problem to be entirely mechanical, which means there may be a physical switch that is stuck in the “on” position.

The circuit breaker may also malfunction without tripping if it sustains partial or total damage. On occasion, a power failure occurs as internal components melt. To ensure appropriate operation, examine the circuit breaker and replace the broken one.

Signs of damaged/ faulty circuit

• Inspect the circuit breakers for any burning odors.
• If the panel feels hot to the touch, the circuit is either broken or overloaded.
• If the circuit is beyond its prime or is too old, replace it with a new one.
• Parts become melted or scorched due to heat.
• The item is defective if it trips off more frequently while gadgets draw more power.

What happens if a breaker doesn’t trip in faults condition?

If a circuit breaker fails to trip during a fault condition, it can lead to various hazardous situations, including:

1. Overheating and Fire Risk: When a circuit experiences an overload or short circuit, excessive current flows through the wires, leading to overheating. If the circuit breaker does not trip to interrupt the flow of current, the wires, insulation, or other electrical components can overheat and potentially ignite a fire.
2. Equipment Damage: The excessive current in the circuit can damage connected electrical devices, appliances, and other equipment. Without the protection of the circuit breaker, the electrical components can sustain irreparable damage, leading to costly repairs or replacements.
3. Electrocution and Safety Hazards: In the absence of circuit protection, the risk of electric shock or electrocution increases, especially if someone comes into contact with live wires or faulty electrical equipment.
4. Damage to the Electrical System: Continual overloading or short circuits without interruption from the circuit breaker can cause significant damage to the overall electrical system, including the wiring, panels, and other connected components. This can lead to extensive repairs and pose a safety risk to the property.

To mitigate the risks associated with a circuit breaker failing to trip during a fault condition, it is crucial to regularly inspect and maintain the electrical system. Consider the following measures:

1. Schedule Regular Inspections: Arrange for periodic inspections of the electrical system by a qualified electrician to ensure that the circuit breakers are functioning correctly.
2. Test the Circuit Breakers: Conduct routine tests on the circuit breakers to verify that they trip appropriately during overload or short circuit situations.
3. Upgrade to Advanced Protection: Consider installing advanced protection devices, such as ground fault circuit interrupters (GFCIs) and arc fault circuit interrupters (AFCIs), to enhance the safety and reliability of the electrical system.

Prioritizing regular maintenance and promptly addressing any issues with the circuit breakers or the electrical system can help prevent hazardous situations and ensure the safety and functionality of your property.

Is the circuit breaker tripping a good or bad thing?

Yes, circuit breaker tripping is good from the perspective of the safety of your home and home appliances.

It also provides protection against dangerous electrical fire hazards due to short circuits and overloading as long as it is not a bad CB.

But sometimes, apparently, you didn’t see any issue, but your circuit breaker keeps tripping and can get you in trouble.

It can be due to wiring issues like too much old wiring, damaged cables, or loose cable connection, which is difficult to troubleshoot because you have to check all the outlet’s wiring connected to the breaker.

That can be time-consuming, but it’s necessary to troubleshoot the fault and rectify it as soon as possible to avoid any bigger damage or loss.

Install my Free Android App on Google Play:

Electrical Cables Most Common Tables

And, my Electrical Calculations App “”

Discover more great content by subscribing to My channel

Looking to stay ahead of the game in the world of electrical engineering? Subscribe to my YouTube channel and gain access to exclusive content you won’t find anywhere else!

The staff I recommend

(Amazon Affiliate Links to products I believe are high quality):

• Economy 120 Volt/60Hz AC Power Source – Step-Down Voltage & Frequency Converters 1800W
• UNI-T Digital Multimeter Tester UT139C
• 50-Amp Extension Cord for RV “100ft”
• Voltage Stabilizer 110/220v
• Hair Dryer “best selling“
• TOSHIBA EM131A5C-BS Countertop Microwave Ovens

Disclaimer: This contains affiliate links to Amazon products. I may earn a commission for purchases made through these links.