A breaker that trips is doing its job. It saw more current than the circuit can safely carry, or it saw current going somewhere it shouldn't, and it cut the power. The question is why, and the answer decides whether you can fix it yourself in thirty seconds or whether you should leave the breaker off and call.
The three reasons a breaker trips
1. Overload. Too much running on one circuit at the same time. A space heater, a microwave and a coffee maker on one kitchen line is the classic case. The breaker trips after things have been running for a while, and it resets fine once you unplug something.
2. A short circuit. A hot wire touching a neutral or ground, inside a device, a cord or the wiring. The breaker trips instantly, often with a snap, and it trips again the moment you reset it.
3. A ground fault or arc fault. Current leaking to ground, or arcing across a loose or damaged connection. GFCI and AFCI breakers are built to catch these, and they can trip on faults that an ordinary breaker would miss.
How to tell which one you have
- Trips after a while, with several things running: almost always an overload. Move something to another circuit and see if it stops.
- Trips the instant you reset it: a short or a fault. Stop resetting it.
- Trips when one particular appliance is plugged in or switched on: the problem is probably in that appliance or its cord, not the wiring.
- Trips at random with nothing obviously running: a loose connection, a failing breaker, or moisture getting into an outlet or junction box. This one needs a visit.
The one thing not to do
Don't keep resetting a breaker that trips right away. Each reset pushes fault current through the wiring again, and the heat that builds at a bad connection is how electrical fires start. Leave it off and call. The free on-site visit is exactly for this.
What we check when we come out
We start with your description, then test at the panel and at the devices on that circuit to isolate the fault: a breaker, a connection, a device, or the wiring in between. We fix the cause rather than swapping the breaker and hoping. And if the problem turns out to be in your appliance, we'll say so.
If the circuit is simply overloaded because the house has grown around a panel that hasn't, that's a different conversation, and it usually starts with a look at the panel.