How it works
Unplug devices on the affected circuit and note what was running when the trip occurred. A one-time overload may clear after the load is reduced, but repeated trips indicate a problem that needs diagnosis.
What people often miss
Do not replace a breaker with a higher rating or keep resetting one that immediately trips. Burning smells, heat, sparks, or damaged wiring require prompt help from a qualified electrician.
Why this question comes up
Portable heaters, kitchen appliances, and added equipment can expose limits in existing circuits.
Key points
- A breaker trips when it detects an unsafe condition such as an overload, short circuit, ground fault, or a problem with an appliance or the circuit itself.
- Unplug devices on the affected circuit and note what was running when the trip occurred. A one-time overload may clear after the load is reduced, but repeated trips indicate a problem that needs diagnosis.
- Do not replace a breaker with a higher rating or keep resetting one that immediately trips. Burning smells, heat, sparks, or damaged wiring require prompt help from a qualified electrician.
Bottom line
A breaker trips when it detects an unsafe condition such as an overload, short circuit, ground fault, or a problem with an appliance or the circuit itself.
Source and verification
This Answer was checked against U.S. Consumer Product Safety Commission: Home Wiring. Follow the source for the full official explanation and any later updates.