No, you should not replace a circuit breaker with a higher amp rating unless the circuit’s wiring and connected equipment are rated for it. A breaker that is too large for its wiring can let the wire overheat without tripping, which creates a fire risk.
This is one of the most common and most dangerous electrical mistakes. Here is why the rating matters.
What a Breaker Is Designed to Protect
A circuit breaker protects the wiring connected to it. Each wire size can safely carry a certain amount of current. The breaker is sized to trip before the wire reaches an unsafe temperature.
For example, in typical home wiring, 14-gauge copper wire is commonly protected by a 15-amp breaker, and 12-gauge copper wire by a 20-amp breaker. Other wire types and conditions have their own limits set by the electrical code.
If a 15-amp circuit gets a 20-amp breaker, the wire can carry more current than it was designed for before the breaker reacts. The wire may get hot inside the wall where you cannot see it.
Why People Try to Upsize Breakers
The usual reason is a breaker that keeps tripping. It may seem like a larger breaker would fix the problem. But the trips are a warning that the circuit is overloaded or has a fault.
Installing a larger breaker removes the warning without fixing the cause. The overload or fault is still there, and now the wiring is no longer properly protected.
When a Larger Breaker Can Be Appropriate
There are cases where a larger breaker is correct. If a circuit is rewired with larger wire that is rated for the higher current, and the outlets and equipment are rated to match, an electrician may install a larger breaker.
Some appliances also call for specific breaker sizes in their installation instructions. Those requirements must match the wiring and the electrical code.
These decisions require a proper assessment. The breaker also has to be compatible with the panel.
Better Solutions for Frequent Trips
If a breaker trips often, there are safer options. Moving some devices to other circuits can reduce the load. Adding a dedicated circuit for a high-demand appliance can stop overloads.
If a fault is causing the trips, repairing the damaged wire, outlet or device solves the real problem. An electrician can test the circuit to find out which applies.
Do not change breakers yourself. Panel work exposes parts that can stay energized, and the wrong breaker can create a hidden fire risk.
If you are thinking about changing a breaker, our breaker replacement services page explains how the right breaker is chosen. If you need more power for an appliance, our dedicated circuit installation page explains how new circuits are added. Contact us to talk through your situation.