Why Does My Circuit Breaker Keep Tripping?

What a Breaker Actually Does

A circuit breaker is a safety device. Its job is to detect when more current is flowing through a circuit than the wiring can safely handle, and disconnect power before the wires overheat and start a fire.

When a breaker trips, it's doing its job. The question is: why is there too much current?

The Three Causes of Tripped Breakers

1. Circuit Overload (Most Common)

Every circuit has a rated capacity — typically 15 or 20 amps for general household circuits. When you plug in too many devices that collectively draw more than that, the breaker trips.

Common overload scenarios:

• Space heater + hair dryer on the same circuit (each draws 12-15 amps)
• Kitchen counter with toaster, coffee maker, and microwave on one circuit
• Multiple window AC units on the same circuit
• Holiday lighting on an already-loaded circuit

The fix: Unplug some devices, spread the load across different circuits, or have an electrician add a dedicated circuit for high-draw appliances.

2. Short Circuit (Serious)

A short circuit occurs when a hot wire touches a neutral wire or ground wire, creating a path of very low resistance. This causes a massive spike in current that trips the breaker instantly.

Signs of a short circuit:

• The breaker trips immediately when you reset it
• You see a spark or hear a pop when the breaker trips
• You smell burning plastic or ozone
• A specific appliance always causes the trip

Common causes:

• Damaged appliance cord (frayed or cut)
• Loose wire connection in an outlet or switch box
• Rodent damage to wiring (rats chewing through insulation)
• Water intrusion into an electrical box

The fix: If a specific appliance causes it, unplug that appliance and test. If the breaker holds, the appliance has an internal short — repair or replace it. If the breaker trips with nothing plugged in, the short is in the house wiring — call an electrician.

3. Ground Fault

A ground fault occurs when current leaks from the hot wire to a ground path — often through water, a metal box, or a person. GFCI outlets and breakers are designed to detect these quickly (5 milliamps) and disconnect in milliseconds.

Common in: bathrooms, kitchens, garages, outdoor circuits, basements — any wet or damp location.

Signs: The GFCI outlet's TEST button pops out, or a GFCI breaker in the panel trips. This is different from a standard breaker trip.

The fix: Dry any wet connections, check for damaged wire insulation, and test the GFCI. If it keeps tripping with nothing plugged in, there's a wiring issue in the circuit.

Failing Breaker

Breakers are mechanical devices and they wear out. After 20-30 years, a breaker may trip at lower current thresholds than rated, or it may fail to trip when it should (which is more dangerous).

Signs of a bad breaker:

• Trips under normal loads that used to be fine
• Feels hot to the touch compared to adjacent breakers
• Won't reset firmly (feels loose or won't click into position)
• Shows visible damage, discoloration, or burn marks

The fix: Breaker replacement is straightforward for a licensed electrician ($100-$250 including the part). Don't replace breakers yourself unless you're qualified to work inside a live panel.

High-Draw Appliances That Need Dedicated Circuits

These appliances draw enough current that they should have their own circuit:

Diagnosing Which Circuit Is the Problem

1. Open the panel cover — each breaker should be labeled. If labels are missing, this is a great rainy-day project.
2. Identify the tripped breaker (it'll be in the middle position, between ON and OFF)
3. Turn it fully OFF, then back ON
4. If it trips immediately — short circuit or ground fault
5. If it holds — slowly turn on/plug in devices on that circuit one at a time until you find the trigger

When to Call a Professional

• Breaker trips immediately every time you reset it
• You see sparks, smell burning, or see discoloration on the breaker
• The breaker feels hot
• You've had the panel or any breakers for 25+ years
• Multiple breakers trip at the same time
• Your panel uses Federal Pacific or Zinsco breakers (known safety defects — strongly recommend a panel upgrade)

Expect to pay: $100-$250 for a single breaker replacement, $150-$300 for a diagnostic visit and circuit troubleshooting, $1,500-$3,500 for a full panel upgrade.