Thinking about swapping out a 15-amp breaker for a 20-amp one to power more devices or prevent frequent trips? You’re not alone—but before you do, there’s one important thing you need to know:
No, you should not replace a 15-amp breaker with a 20-amp breaker unless you also upgrade the wiring.
Doing so without the proper wire size can create a serious fire hazard. Here’s why.
Why You Shouldn't Just Swap the Breaker
1. Wiring Capacity
Most 15-amp circuits are wired with 14-gauge wire (14 AWG), which is rated for up to 15 amps of current. A 20-amp breaker is designed to work with 12-gauge wire (12 AWG), which can safely carry more current.
Putting a 20-amp breaker on a 14-gauge wire is like connecting a firehose to a garden hose—it forces more current through a path that isn’t built for it.
2. Overloading the Circuit
A breaker’s job is to trip when too much current flows through a circuit, preventing overheating. If you upgrade the breaker but not the wiring, you’re removing the safety buffer. The breaker might allow more current than the wire can handle—and that’s a recipe for trouble.
3. Fire Risk
When a circuit is overloaded with a breaker that doesn’t trip at the right threshold, wires can overheat, melt their insulation, and ignite nearby materials. Electrical fires are among the most dangerous and devastating—and this is a common cause.
What to Do If You Need More Power
If you’re consistently tripping a 15-amp breaker or need more capacity for your devices, there are safer alternatives:
✅ Evaluate Your Wiring
Check to see if the circuit is already wired with 12-gauge wiring. If it is, a 20-amp breaker may be appropriate—but still requires a proper inspection.
✅ Consult a Licensed Electrician
Always bring in a professional to assess the situation. They can evaluate the wiring, outlets, and load to determine if a breaker upgrade is safe—and legal under local code.
✅ Add a New Circuit
If your current circuit is overloaded, the best solution might be to install a new, dedicated 20-amp circuit with the right breaker and wiring from the start.
Your home’s electrical system is designed with safety in mind. Breakers and wiring work together to prevent overloads and fires. Replacing a 15-amp breaker with a 20-amp one without upgrading the wiring might seem like a quick fix—but it’s a risky shortcut that can put your home and family in danger.
When in doubt, call a pro.