Why Does My Circuit Breaker Keep Tripping?

1. Overloaded Circuit

The most common cause of a tripping breaker is a circuit that is drawing more amperage than it is rated for. A 15-amp circuit can safely handle about 1,800 watts of continuous load. If you have a space heater (1,500W), a laptop charger (65W), and a lamp (60W) all on the same circuit, you are right at the edge — add a vacuum cleaner and the breaker trips.

The fix: redistribute your loads across multiple circuits. Move high-draw appliances like space heaters and hair dryers to their own dedicated circuits. If a single room consistently overloads, an electrician can add a new circuit to the panel.

2. Short Circuit

A short circuit happens when a hot wire touches a neutral wire, creating a path of near-zero resistance. The result is a massive surge of current — far more than the breaker is rated for — which trips the breaker immediately and forcefully. Short circuits are more serious than overloads.

Signs of a short circuit: a burning smell near an outlet, scorch marks on outlet covers, or a breaker that trips the instant you flip it back on. Common causes include damaged wiring inside a wall, a faulty appliance cord, or a loose wire connection inside an outlet box.

The fix: unplug everything on the circuit and reset the breaker. If it holds, plug appliances back in one at a time to find the faulty device. If the breaker trips immediately with nothing plugged in, you have a wiring problem that requires a licensed electrician.

3. Ground Fault

A ground fault is similar to a short circuit but involves the hot wire contacting a grounded surface — the metal housing of an appliance, a wet floor, or the ground wire itself. Ground faults are especially dangerous in wet areas like bathrooms, kitchens, and outdoor circuits because they can cause electrocution.

GFCI outlets and GFCI breakers are designed specifically to detect ground faults and trip within milliseconds. If your GFCI breaker trips repeatedly, especially when using appliances near water, take it seriously.

The fix: test and replace any GFCI outlets on the circuit. If the problem persists, have an electrician inspect the wiring for moisture intrusion or damaged insulation.

4. Arc Fault

Arc faults occur when electricity jumps (arcs) across a gap in damaged or loose wiring. Unlike overloads and short circuits, arc faults can smolder inside walls for hours before starting a fire — which is why they are the leading cause of residential electrical fires in the US.

AFCI (Arc Fault Circuit Interrupter) breakers are required by the NEC in bedrooms, living rooms, and most other living spaces in new construction. If you have an AFCI breaker that trips frequently, it may be detecting real arc faults in aging wiring.

The fix: do not simply replace an AFCI breaker with a standard breaker to stop the tripping. Have an electrician inspect the wiring for damaged insulation, loose connections, or staple damage.

5. Faulty Breaker

Circuit breakers have a finite lifespan. A breaker that has tripped hundreds of times, is 20+ years old, or was subjected to a major fault event may have weakened internal components that cause it to trip at lower-than-rated loads.

Signs of a faulty breaker: it trips under light loads, it feels warm or hot to the touch, it has visible burn marks or a burning smell, or it no longer holds the ON position.

The fix: replace the breaker. This is a job for a licensed electrician unless you are experienced with panel work. The replacement breaker must be the same brand, amperage, and type as the original — not all breakers are interchangeable.

6. Loose Wiring in the Panel

Loose wire connections inside the panel — at the breaker terminal, the neutral bar, or the ground bar — can cause intermittent tripping, overheating, and arcing. This is a serious fire hazard.

Signs: a breaker that trips randomly with no apparent overload, a burning smell from the panel, or discoloration around breaker terminals.

The fix: turn off the main breaker and have a licensed electrician inspect and tighten all connections. Never work inside a panel with the utility power still on — the main lugs remain energized even with the main breaker off.

When to Replace vs. When to Call an Electrician

Replace the breaker yourself (if experienced) when: the breaker is clearly faulty, the circuit is simple, and you know how to work safely in a panel.

Call a licensed electrician when: the breaker trips immediately after reset, you smell burning, you see scorch marks, the problem is intermittent and hard to reproduce, or you are not comfortable working in the panel.

Need a replacement breaker? The AllBreakerSales.com catalog includes Square D, Eaton, Siemens, GE, and Westinghouse breakers with written quotes. Request a written quote to confirm the required catalog number and current availability. Call (951) 903-9804 or use our catalog number search to find your exact replacement.