Why Does My Breaker Keep Tripping the Same Circuit?

Scope of this guide: This page is for a breaker that trips repeatedly and needs root-cause diagnosis. For a one-time trip and reset procedure, use the linked reset guide.

A circuit breaker that keeps tripping on the same circuit is telling you something. It is not a random event - breakers trip for specific reasons. The goal is to figure out which reason applies so you can fix the actual problem instead of just resetting the breaker repeatedly.

The Three Main Reasons a Breaker Trips

Overloaded circuit. The most common cause. Each circuit has a rated capacity - typically 15 or 20 amps for standard household circuits. When the total draw from all devices on that circuit exceeds the breaker's rating, it trips to prevent the wiring from overheating.

Short circuit. A short happens when a hot wire contacts a neutral wire, causing a sudden surge of current. It trips the breaker immediately and forcefully. If the breaker trips the moment you flip a switch or plug in a device, a short is likely.

Ground fault. Similar to a short but involving a hot wire contacting a ground wire or grounded surface. GFCI outlets protect against ground faults in bathrooms, kitchens, and outdoor areas.

Diagnosing an Overloaded Circuit

If the breaker trips after running multiple devices for a while - especially in kitchens, home offices, or rooms with a lot of electronics - overload is the likely cause.

Add up the wattage of everything plugged into that circuit. Divide by 120 to get amps. If it is above 12 amps on a 15-amp circuit or above 16 amps on a 20-amp circuit, you are at or over capacity.

Common overload triggers: space heaters, hair dryers, microwave ovens, and window air conditioners are all high-draw devices that frequently cause trips when shared with other devices on the same circuit.

The fix: redistribute devices to other circuits. Move a space heater to a different outlet on a different circuit. Do not use high-draw devices simultaneously if they share a circuit.

Diagnosing a Short Circuit

Signs of a short: the breaker trips immediately, there may be a popping sound when the trip happens, or you notice a burning smell. If the trip happens the same way every time a specific device is plugged in, the device is likely shorted internally - test it on a different circuit.

If the breaker trips with nothing plugged in, the short is in the wiring itself. This requires an electrician.

When the Breaker Is Failing

Breakers wear out over time. An older breaker may start tripping at loads it previously handled without issue. If the circuit appears to be within normal load and there is no sign of a short or ground fault, the breaker itself may be the problem. Breaker replacement is a straightforward job for an electrician.

When to Call an Electrician

Call an electrician if the breaker trips with nothing plugged in, if you find any sign of burning or scorch marks at outlets or the panel, if the circuit cannot handle a normal load without tripping even after redistributing devices, or if you suspect the wiring is at fault.

Do not solve a repeatedly tripping breaker by replacing it with a higher-rated one - the breaker's rating is matched to the wire gauge. Upsizing the breaker allows the wiring to overheat, which is a fire risk.

Sources and editorial notes

Prices and permit requirements vary by location, property, equipment, and scope. Treat price ranges as planning estimates and confirm current requirements with the relevant authority and contractor.

• US Department of Energy - Energy Saver
• US Consumer Product Safety Commission - home safety

Related guides

• How to Reset a Tripped Circuit Breaker (And When It Keeps Tripping)
• Arc Fault Breakers: Why They Trip and What to Do
• Garbage Disposal Not Working: Common Fixes Before Calling a Plumber

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