Breaker Keeps Tripping? Causes, Safe Resets and When to Call an Electrician

Last updated October 11, 2026

When a breaker keeps tripping, it is protecting the wiring behind your walls. It cuts the power when a circuit carries more current than its wire can safely handle, or when current is flowing where it should not, and the fix depends on which of those is happening. In winter, start with the space heater: a typical 1,500-watt heater is already above the 1,440 watts the Electrical Safety Foundation recommends as the ceiling for a whole 15-amp circuit.

This guide covers how to read the trip pattern, how to reset a breaker safely, when to stop resetting it, and what Oregon’s code says about bigger breakers, arc-fault breakers and permits. It is written for Oregon homes in the Portland area, where the 2026 Oregon Electrical Specialty Code took effect on October 1, 2026. Vancouver and Clark County follow Washington’s rules, which this guide does not cover.

How do I read the trip pattern?

The way a breaker trips tells you most of what you need to know before anyone opens the panel. This is how our electricians narrow it down. It is a starting point, not a diagnosis.

Why a breaker keeps tripping

A standard breaker trips for one of three reasons: an overload, a short circuit or a ground fault. UL’s technical guidance for code officials describes all three as overcurrents, and the breaker opens the circuit before that current overheats the wire.

• Overload. Too many things running on one circuit. When the total load pushes past the circuit’s 15- or 20-amp rating, the breaker opens before equipment is damaged or a fire starts.
• Short circuit. A hot conductor touching a neutral or another conductor, which lets a very large current flow.
• Ground fault. Current finding a path to ground that it should not have.

Two other things can cause it. The breaker itself can fail, which PGE lists alongside overloads and faults as a reason a breaker keeps tripping. And a standard breaker is not designed to catch arcing faults, because some damaging arcs draw too little current or last too briefly to trip it. That is the job of an arc-fault breaker, which recognizes the electrical signature of arcing and shuts the circuit off. A ground-fault (GFCI) device is different again: it compares the current going out with the current coming back and cuts power when they differ by about 5 milliamperes, in as little as 1/40 of a second.

How can I tell an overload from a short circuit?

The timing tells you which one. Residential breakers are thermal-magnetic: a bimetal strip heated by the load current trips them on an overload, with a delay that gets shorter as the current rises, and a magnetic element trips them instantly on short-circuit current.

So a breaker that holds for twenty minutes and then trips while the heater and the hair dryer are both running is behaving like an overload. A breaker that snaps off the instant you push it back on is reacting to something bigger. That can point to a fault on the circuit or a breaker that has failed, and either way it is a reason to stop resetting it.

Why does my breaker trip more in winter?

Because winter is when the space heaters come out. The Electrical Safety Foundation (ESFi) puts a 15-amp, 120-volt circuit at 1,800 watts and recommends staying under 80 percent of that, or 1,440 watts. Its own wattage table lists a portable heater at 1,500 watts. One heater is over the line before the TV, lamp or laptop on the same circuit adds anything.

The electrical code has its own, separate 80 percent limit. Under the National Electrical Code, a single plug-in appliance that is not fastened in place, such as a portable heater, should not draw more than 80 percent of the circuit’s rating: 12 amps on a 15-amp circuit and 16 amps on a 20-amp circuit. A 1,500-watt heater draws about 12.5 amps at 120 volts. Oregon has not amended that rule, so the national limit applies here unchanged.

Winter is also when home electrical fires peak. In NFPA’s 2015 to 2019 data, December through March accounted for 40 percent of home fires involving electrical distribution and lighting equipment, and 45 percent of the deaths. Fixed and portable space heaters together, in NFPA’s 2016 to 2020 averages, were involved in 33 percent of home heating fires but 88 percent of the deaths from those fires.

The first steps are simple, and Oregon’s State Fire Marshal spells them out: plug space heaters directly into a wall outlet, never into an extension cord or power strip, and keep anything that can burn at least three feet away. The Fire Marshal also says extension cords are for temporary use only, never to daisy-chain power strips, and to have an electrician install more outlets and add a breaker if you need them. CPSC gives the same plug-into-the-wall advice and estimates portable heaters were involved in an average of 1,700 fires and 70 deaths a year from 2017 to 2019.

Is it safe to keep resetting a breaker?

Reset it once, the right way. If it trips again, stop. That is our advice, and it lines up with the safety guidance below.

ESFi’s steps: turn off or unplug the appliances on that circuit first, then push the handle all the way to OFF and back to ON. A tripped breaker can sit in a middle position close to ON, so the firm push to OFF first matters.

Repeated resetting is where the risk is. The University of Washington’s environmental health and safety office warns that repeatedly resetting a breaker could cause an arc flash or a fire, and says a short circuit or ground fault calls for a qualified electrician. Federal OSHA rules go further for workplaces: they prohibit repeatedly resetting a tripped breaker and require confirming the circuit is safe before turning it back on. Those rules bind employers, not homeowners, but the reasoning applies just as well to a home panel.

What does it mean when a breaker won’t reset?

A breaker that won’t stay on, or trips the moment you reset it with everything unplugged, can point to a fault on the circuit or a failed breaker. Either way the answer is the same: leave it off and call an electrician.

Check the handle first. If you pushed it straight to ON without going fully to OFF, it may not have reset at all. Do that once, properly. If it still won’t hold, the problem is past what a homeowner should chase.

PGE says the same from the utility side: a breaker that keeps tripping is usually a problem in the home’s own system, such as an overload, a defective breaker or a fault, and an electrician should look at it first.

Can I put in a bigger breaker so it stops tripping?

No. The breaker is sized to protect the wire, not the appliance. Under the National Electrical Code, ordinary household circuits wired with 14-gauge copper are limited to a 15-amp breaker and 12-gauge copper to a 20-amp breaker, with narrow exceptions for equipment such as motors and air conditioners. So a 15-amp breaker on 14-gauge wire cannot simply be swapped for a 20. Oregon has not amended that section (NEC 240.4): the only Article 240 sections in Oregon’s 2026 amendment table are 240.6(D), 240.24(E), 240.67(C) and 240.87(C).

A bigger breaker does not fix an overload. It removes the thing that was stopping the wire from overheating. The real fixes are spreading the load across circuits, or adding a new circuit for the heavy load.

Do circuit breakers wear out?

Slowly, and faults wear them faster than overloads do. IAEI notes that molded-case breakers last tens of years under occasional overloads, but repeated high short-circuit faults shorten their life and can mean the breaker needs inspecting or replacing.

A breaker that is hot to the touch, discolored, cracked or buzzing should be looked at. An industry inspection guideline for commercial and industrial breakers treats an overheated breaker as cause for investigation and a cracked case as cause for replacement. If the sound is coming from the panel itself, our guide to a buzzing electrical panel covers what each sound means.

Is it my breaker or a PGE outage?

Look outside first. Before you report an outage, PGE suggests checking whether your neighbors have lost power too, resetting GFCI outlets, and checking your panel for tripped breakers. If one room is dark and the neighbors have lights, the problem is most likely inside your home.

PGE says it is not authorized to make house wiring repairs, so a problem on your side of the meter is one for an electrician, not the utility. If the whole street is dark, check PGE’s outage map instead.

When is a tripping breaker an emergency?

Treat it as an emergency if a tripped breaker comes with a burning smell, smoke, a scorched or discolored breaker or panel, a breaker that is hot to the touch, or buzzing or crackling. That is our guidance: leave the breaker off, keep away from the panel, and call us. If you see smoke or flames, get everyone out and call 911.

Below that line, ESFi lists frequently tripping breakers, outlet and switch plates that are hot or discolored, and crackling, sizzling or buzzing from outlets as reasons to have a licensed electrician inspect the home. If an outlet is smoking, read what to do when an outlet smokes, and see our 24/7 emergency service.

Do I need a permit to fix a tripping breaker in Portland?

It depends on the fix. Moving a space heater to a different outlet is not electrical work. Replacing a breaker or adding a circuit is, and Oregon requires an electrical permit before electrical work starts.

For a licensed contractor, Oregon’s minor-label program covers circuit breaker replacement, along with adding up to three new circuits of no more than 60 amps and 150 volts to ground. It cannot be used for work that needs a cover inspection, plan review, underground wiring, or a complete service or panel replacement. A minor label includes one inspection.

Homeowners have a narrower path. Oregon exempts a homeowner from the electrical license, not the permit, for work on a home they own and do not plan to sell or rent. In Portland, you can do your own permitted electrical work only on a home you own and live in, not on a rental, a home for sale or an ADU. Portland’s permit page lists replacing a fuse among the jobs that need no permit, but does not list a breaker swap among them.

Permit fees vary by jurisdiction. See Portland’s electrical permit fee schedule or Washington County’s, and in unincorporated Multnomah County, check with the city or county that serves your address. When we do the work, we file the permit.

What does Portland’s older housing mean for your breakers?

About half of the homes in the city of Portland were built before 1970, and nearly half before 1960, according to the Census Bureau’s 2024 American Community Survey. Across the Portland-Vancouver metro, which includes Clark County, Washington, the share is much lower. A house wired in the 1950s was wired before the loads most households run today, so if a breaker in an older house trips often, it is worth having an electrician check what each circuit is carrying.

If the answer turns out to be more capacity, our guides to panel upgrade cost in Portland and electrical service upgrades cover the next step. And if you do replace an older panel, Oregon’s 2026 code does not make you add AFCI protection to existing circuits that did not have it.

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