The common causes
An electrician works through 6 conditions that all produce does my breaker keep tripping.
- Circuit overload: Total connected load exceeds the circuit rating, often after a new appliance, heater or tool is added.
- Short circuit: A hot conductor contacting a neutral or ground, usually at a damaged cable, device or appliance cord.
- Ground fault: Current leaking to ground, commonly where moisture reaches a device, fixture or exterior circuit.
- Arc fault: An AFCI breaker detecting the signature of arcing, which can come from damaged cable, a loose termination or some appliances.
- Failed appliance: A single appliance drawing a fault. Unplugging suspect items one at a time can narrow it, without opening anything.
- Failed or undersized breaker: Breakers wear. A breaker that trips at well under its rating may itself have failed, but it must never simply be replaced with a larger one.
What to note before you call
For a breaker that keeps tripping, 5 observations do most of the work.
- Which rooms, outlets or appliances go dead when it trips
- Whether it trips immediately or after a period of use
- What was plugged in or switched on just before
- Any burning smell, warmth, buzzing, discolouration or scorch marks
- Whether it started after new equipment, weather or building work
How an electrician narrows down a tripping breaker
The first question is what the breaker is protecting against, because a standard breaker, an arc-fault breaker and a ground-fault breaker trip for different reasons. A standard breaker trips on overload or a short circuit. An arc-fault breaker also trips on the signature of arcing, which is why a damaged cord or a loose connection can trip one while drawing very little current. A ground-fault breaker trips when current leaks to ground, which is how a wet or failing appliance sets it off.
The electrician then separates the circuit into its parts: unplug everything, reset the breaker, and add loads back one at a time. If it trips with nothing connected, the fault is in the wiring, a device, or the breaker. If it trips only when one appliance runs, the appliance or the load it adds is the cause. A breaker that trips immediately on reset is a different problem from one that runs for an hour and then trips, because the first suggests a hard short and the second suggests heat building in a connection or a sustained overload.
Vermont homes and tripping breakers
Older Burlington-area housing raises a few specific possibilities. Homes from before the 1960s often have kitchens and living areas fed by circuits that were sized for a fraction of today's loads, so a toaster, microwave and space heater on one run will trip it every time. Homes wired in the mid-1960s to early 1970s can have aluminum branch wiring, whose connections loosen over time and heat under load. Winter matters too: space heaters, heat tape and block heaters add long continuous loads that a summer-era circuit was never asked to carry.
Panels that are decades old can also be the cause. Breakers wear, and some older brands have known histories of failing to trip or tripping unpredictably. That is a question for a licensed electrician to answer by inspection, not something to settle by swapping in a larger breaker, which removes the protection that the wire size depends on.
What the repair usually involves
The outcomes run from trivial to substantial: moving a heavy appliance to its own circuit, replacing a failed breaker, tightening or replacing a device at a loose connection, or adding a dedicated circuit where the load is legitimately more than the wiring was built for. The scope depends on which cause is identified, which is why a written cause and scope before approval matters more here than a price over the phone.
What happens next
For a breaker that keeps tripping, the related service is breaker and fuse box repair.