Why does my breaker keep tripping?

Overloaded circuit (the most common cause)

An overloaded circuit is the most frequent reason a breaker trips. It happens when too many devices run on the same circuit at once, pulling more amperage than the breaker is rated to handle, and the breaker shuts things down before the wiring overheats.

Older Portland homes, especially those built before the 1990s, were wired for far less electrical demand than modern households require. You can try unplugging some devices, moving appliances to other circuits, and resetting the breaker once. If it trips again, it is time to call a licensed electrician.

• A space heater running at the same time as a microwave
• A hair dryer and bathroom heater on the same circuit
• A garage fridge plus power tools on one outlet
• An EV charger sharing a circuit with other loads

Short circuit (more serious)

A short circuit occurs when a hot wire touches a neutral wire inside an outlet, switch, appliance, or your panel, creating a sudden surge of current that trips the breaker immediately. Unlike a simple overload, this is a wiring fault and requires a licensed electrician to diagnose and repair safely.

Short circuits can damage wiring and create a real fire risk. This is not a DIY situation. Do not keep resetting the breaker; call a licensed electrician.

• A burning smell near an outlet or panel
• A blackened or discolored outlet
• An outlet or switch plate that feels warm to the touch
• A breaker that trips instantly the moment you reset it

Failing breaker or outdated panel

Sometimes the breaker itself is the problem. Breakers are mechanical devices and wear out over time, especially in panels 20 or more years old. A breaker that trips under normal loads, will not stay reset, or feels loose is telling you it needs to be replaced.

Older panels in Portland homes, especially Federal Pacific (Stab-Lok) and Zinsco brands, are particularly prone to this. These panels have known safety defects, and if your home has one it is worth getting it evaluated.

• The breaker feels loose or wobbly in the panel
• The breaker will not stay in the reset position
• It trips randomly without any obvious load
• The panel is a Federal Pacific, Zinsco, or other recalled brand
• The panel is more than 25 to 30 years old

Is it safe to keep resetting a breaker?

The rule is simple: reset it once. If it trips again, stop. Repeatedly forcing a tripping breaker back on does not fix the problem; it bypasses your home's main safety mechanism.

A repeatedly tripping breaker is a symptom, not the problem itself. The problem is whatever is causing it to trip, and that is what needs to be fixed. Overriding it can overheat wiring inside your walls, damage appliances, and increase the risk of an electrical fire.