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Why Does My Breaker Keep Tripping?

A breaker keeps tripping because something on that circuit draws more current than it should: an overload, a short circuit, a ground fault, an arc fault, or a worn-out breaker. One trip after running too many appliances is normal. Repeated trips, a burning smell, or a breaker that trips the instant you reset it mean you should stop resetting it and call an electrician.

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Step by step

  1. Note what was running when the breaker tripped and which lights and outlets went dead.
  2. Turn off or unplug everything on that circuit.
  3. Reset the breaker: push it firmly to OFF, then back to ON.
  4. If it holds, turn things back on one at a time, waiting a bit between each, to find the culprit.
  5. If it trips with nothing plugged in, or trips the instant you reset it, leave it off and call an electrician.

What causes a breaker to trip?

Breakers trip to keep the wires from overheating. The five usual causes:

  • Overload: too many devices on one circuit. Family Handyman's example is a 12-amp space heater and a 15-amp miter saw on one 20-amp garage circuit.
  • Short circuit: a hot wire touches a neutral wire, often from a loose connection, a damaged cord, or wire chewed by pests, causing a sudden surge of current.
  • Ground fault: current leaks to ground through metal or water, such as a wet outdoor outlet. Ground faults are especially dangerous because the path can run through a person.
  • Arc fault: an AFCI breaker senses sparking from damaged, overheated, or loose wiring and shuts off before a fire can start.
  • Worn-out breaker: an aging breaker can trip too easily or refuse to reset.

Is it dangerous if a circuit breaker keeps tripping?

The trip itself is the breaker doing its job. The danger is whatever is causing it. In ESFI's 2024 survey of California electrical contractors, 54% of service calls involved tripped breakers or fuses, most trips came from the device working as intended, and 74% of contractors had seen evidence of dangerous arcing on AFCI-related calls.

Electrical problems are a leading cause of home fire damage. NFPA estimates that from 2019 to 2023, U.S. home fires involving electrical distribution and lighting equipment averaged 31,650 a year, with about 430 deaths and $1.6 billion in direct property damage annually.

The CPSC's advice is simple: find out why a breaker tripped rather than just resetting it, and call a licensed electrician if you're not sure.

Why does my breaker trip when I turn on one appliance?

If the same appliance trips the breaker every time, try it on a circuit in another room. If it trips there too, the appliance probably has a short or ground fault and needs repair or replacement. If it only trips on the first circuit, that circuit may be overloaded, may need a dedicated line for that appliance, or may have a failing breaker.

How can I tell if a breaker is bad?

Watch for these signs, and don't open the panel's inner cover to check. EC&M notes the wires feeding the panel stay energized even with the main breaker off.

  • It won't stay ON even with everything on the circuit unplugged
  • It feels hot, or the panel smells like burning
  • You see scorch marks, melted plastic, or cracks
  • It trips at random with very little load

Why do GFCI and AFCI breakers trip?

GFCI devices cut power when they sense current leaking to ground, protecting people from shock in kitchens, bathrooms, garages, laundry areas, and outdoors. Moisture in an outdoor outlet or a worn appliance cord are common triggers.

AFCI breakers watch for arcing, the sparking that comes from damaged or loose wiring. Under the National Electrical Code that California adopts, AFCI protection is required on most 120-volt circuits in rooms like bedrooms, living rooms, kitchens, hallways, and laundry areas. If an AFCI trips repeatedly, don't swap it for a standard breaker; have the circuit checked.

What will an electrician check?

A good diagnosis usually covers:

  • The load on each circuit and whether you need a new dedicated circuit
  • Loose or burned connections at outlets, switches, and the panel
  • Damaged cords or appliances
  • The breaker itself and its connection to the panel
  • Whether the panel is a brand inspectors flag, such as FPE Stab-Lok or Zinsco

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Frequently asked questions

How many times should I reset a tripped breaker?
Once, as a test. Unplug what's on the circuit, push the breaker firmly to OFF, then ON. If it holds, add loads back one at a time. If it trips again right away or keeps tripping over the next few days, stop resetting it and call an electrician. ESFI says frequent trips indicate a problem that a qualified electrician should inspect.
Can I put in a bigger breaker so it stops tripping?
No. A breaker is sized to protect the wire on that circuit. EC&M explains that a breaker opens when current reaches a level that would overheat the protected wire, so a bigger breaker on the same wire lets that wire get dangerously hot before anything trips. If you need more power in a room, an electrician can add a new circuit.
Why does my breaker trip at night or when nothing is on?
Something on that circuit may still be drawing power or leaking current, like a refrigerator, a furnace fan, an outdoor outlet that gets damp, or damaged wiring. A breaker that trips with no obvious load often points to a ground fault, an arc fault, or a worn breaker rather than an overload. That's a job for an electrician to trace.

Available across the Sacramento area

Sources

  1. How to Reset a Tripped Circuit Breaker — Family Handyman
  2. Why Is My Circuit Breaker Tripping? — Bob Vila
  3. 2024 AFCI and GFCI Performance Survey (California) — Electrical Safety Foundation International (ESFI)
  4. Home Structure Fires (August 2025) — National Fire Protection Association (NFPA)
  5. Commission Closes Investigation of FPE Circuit Breakers and Provides Safety Information for Consumers (1983) — U.S. Consumer Product Safety Commission
  6. Panelboard Safety Matters — EC&M
  7. NEC Requirements for GFCIs and AFCIs — EC&M
  8. NEC Requirements for GFCI Protection: Section 210.8 — IAEI Magazine
  9. The 2025 California Electrical Code, Title 24 Part 3 (based on the 2023 National Electrical Code) — California Building Standards Commission
  10. Fuse and Breaker Breakdown — Electrical Safety Foundation International (ESFI)
  11. Conductor Sizing, Part 1 of 2 — EC&M
  12. Inspecting the Main Electrical Panelboard — InterNACHI
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