A circuit breaker is a safety device. When it trips, it has detected more current than the wire can safely carry, or a fault that could start a fire. Resetting it over and over without finding the cause is the one thing you should not do.
1. The circuit is overloaded
This is the most common reason. Too many things are running on one circuit: a space heater and a hair dryer, or a microwave and a toaster. The breaker usually trips after a few minutes, not instantly. Move a load to another circuit and see if the problem stops. If one appliance keeps overloading a shared circuit, it needs a dedicated circuit.
2. A short circuit
If the breaker trips the instant you reset it, a hot wire may be touching a neutral or another hot wire. Damaged cords, a failed appliance or a loose wire in a box can all cause it. Unplug everything on the circuit and try once more. If it still trips, stop and call for electrical troubleshooting.
3. A ground fault
Current leaking to ground, often through moisture in an outdoor box, a bathroom or a garage, trips GFCI breakers and outlets. Look for water in exterior outlets after rain or snowmelt.
4. An arc fault
Newer AFCI breakers detect the sparking of a loose or damaged connection. These trips are worth taking seriously because arcing is a leading cause of electrical fires.
5. The breaker is worn out
Breakers weaken with age and with repeated tripping. A breaker that feels loose, is warm to the touch or will not reset may need circuit breaker replacement. If the panel itself is the issue, an electrical panel upgrade may be the right fix.
When it is an emergency
Call an emergency electrician right away if you smell burning, see scorch marks, hear buzzing from the panel or the breaker is hot. KITMUND answers 24/7 across Utah at (888) 633-7804, from Salt Lake City and Provo to St. George.