Most refrigerators need a 15-amp or 20-amp circuit breaker on a dedicated line

A standard refrigerator draws between 3 and 6 amps while running, but the motor can pull 10 to 15 amps when it first starts. This surge means you need a breaker sized to handle the startup load, not just the steady-state draw. The National Electrical Code requires refrigerators to have their own dedicated circuit — one that powers nothing else — and that circuit must be either 15 amp or 20 amp depending on the wire gauge running to the outlet.

If your refrigerator is already installed and working without tripping the breaker, the existing breaker is the correct size for that unit. If you are installing a new refrigerator, wiring a new kitchen, or replacing a breaker that keeps tripping, you need to know what wire gauge is already in the wall. A 15-amp breaker requires 14-gauge wire; a 20-amp breaker requires 12-gauge wire. If the wire is too small for the breaker, you cannot straightforward upgrade the breaker — you must upgrade the wire as well, which usually means calling an electrician.

Key Takeaways

  • A 15-amp breaker with 14-gauge wire or a 20-amp breaker with 12-gauge wire will handle any standard refrigerator.
  • The refrigerator must have its own dedicated circuit that powers nothing else in the house.
  • If a breaker keeps tripping, the problem is usually a short in the refrigerator cord or outlet, not an undersized breaker.
  • Never upgrade a breaker size without first confirming the wire gauge can handle it; undersized wire creates a fire hazard.
  • Check your refrigerator's manual or the nameplate on the back for the exact amperage draw if you are troubleshooting an existing installation.

Why refrigerators need their own circuit

The National Electrical Code (NEC) requires a dedicated circuit for refrigerators because the motor draws a large surge of current when it starts, and that surge can cause other appliances on the same circuit to lose power or malfunction. If your microwave, dishwasher, or countertop outlets share a circuit with the refrigerator, the refrigerator's startup can dim the lights or cause those outlets to drop power momentarily.

A dedicated circuit also protects the refrigerator itself. If another appliance on the same circuit shorts out or draws too much power, it can trip the breaker and shut down the refrigerator, spoiling food. By isolating the refrigerator on its own breaker, you may support it stays powered even if something else in the kitchen fails.

15-amp versus 20-amp: which one do you have

The difference between a 15-amp and 20-amp breaker is the wire gauge behind it. A 15-amp breaker must be paired with 14-gauge wire; a 20-amp breaker must be paired with 12-gauge wire. You cannot put a 20-amp breaker on 14-gauge wire because the wire will overheat and potentially catch fire before the breaker trips.

To find out which you have, turn off the breaker and look at the label on the switch itself — it will say either 15 or 20. If you cannot read it clearly, or if you are planning new wiring, you need to know the wire gauge inside the wall. This requires opening the outlet box or tracing the wire back to the breaker panel, which is a job for a licensed electrician if you are not comfortable doing it yourself.

For a new refrigerator installation, a 20-amp circuit is the safer choice because it gives you more headroom and is less likely to trip if the refrigerator's motor is aging or drawing slightly more current than usual. However, a 15-amp circuit will work fine for any standard refrigerator as long as the wire is the correct gauge.

What to do if the breaker keeps tripping

If the breaker trips every time the refrigerator runs, the problem is almost never that the breaker is too small. A refrigerator that draws enough current to trip a properly sized breaker would be drawing far more than any manufacturer allows. The real culprit is usually a short circuit in the refrigerator's power cord, a damaged outlet, or a ground fault in the wiring.

Start by plugging the refrigerator into a different outlet on the same circuit — if it still trips, the problem is the refrigerator itself, and you should have it serviced or replaced. If it does not trip on the other outlet, the first outlet is damaged and needs to be replaced by an electrician. If the refrigerator trips the breaker on every outlet in the kitchen, the breaker itself may be failing, which is rare but possible.

Do not replace the breaker with a larger one to stop the tripping. That will only mask the real problem and create a fire hazard. A tripping breaker is doing its job — it is protecting you from a fault somewhere in the circuit.

Wire gauge and breaker size must match

This is the most important rule: the breaker size must match the wire gauge, not the other way around. If you have 14-gauge wire, you must use a 15-amp breaker. If you have 12-gauge wire, you can use a 15-amp or 20-amp breaker. You cannot use a 20-amp breaker on 14-gauge wire under any circumstances.

If you are replacing a breaker and you do not know the wire gauge, do not guess. Turn off the main breaker, remove the panel cover (or have an electrician do this), and look at the wire connected to that breaker. The gauge is usually printed on the insulation. If it is not, measure the diameter: 14-gauge wire is about 0.064 inches in diameter; 12-gauge is about 0.081 inches. A wire gauge tool costs a few dollars and removes the guesswork.

Older homes and undersized circuits

Homes built before the 1990s sometimes have 14-gauge wire running to the refrigerator outlet, which means a 15-amp breaker is the maximum allowed. If you want to upgrade to a 20-amp circuit, you must replace the wire from the breaker panel to the outlet, which is a job that requires opening walls or running new wire through conduit. This is not a DIY task and will cost several hundred dollars.

If your refrigerator works fine on a 15-amp circuit, there is no reason to upgrade. The 15-amp breaker is sufficient for any standard refrigerator. Upgrading makes sense only if you are already renovating the kitchen or if you plan to install a high-end refrigerator with a built-in ice maker and water dispenser that draws more power than average.

Checking your refrigerator's power requirements

Most refrigerators are designed to work on a standard 15-amp or 20-amp household circuit. The nameplate on the back of the refrigerator lists the voltage (usually 120 volts) and the maximum amperage draw. For example, you might see "Max 6.0 amps" or "Rated 5.5 amps." This is the steady-state draw, not the startup surge.

If your refrigerator's manual specifies a particular breaker size, follow that recommendation. Some high-end or commercial-grade refrigerators may require a 30-amp circuit or even 240-volt service, but these are rare in residential kitchens. If you are unsure, the manufacturer's customer service line can tell you what breaker size is correct for your model.

Frequently Asked Questions

Can I put a refrigerator on a regular kitchen outlet that shares a circuit with other appliances?

No. The National Electrical Code requires a dedicated circuit for refrigerators. Sharing a circuit with a microwave, dishwasher, or countertop outlets can cause the breaker to trip when the refrigerator starts, and it puts the refrigerator at risk of losing power if another appliance fails. If your refrigerator is currently on a shared circuit, it should be moved to its own dedicated line.

What if I want to upgrade from a 15-amp to a 20-amp breaker?

You can upgrade only if the wire running to the outlet is 12-gauge or larger. If it is 14-gauge, upgrading the breaker is unsafe and will create a fire hazard. If you do not know the wire gauge, have an electrician check it before you make any changes. Upgrading the wire itself is possible but expensive and usually not necessary for a standard refrigerator.

Why does my breaker trip when the refrigerator compressor starts?

A properly sized breaker should not trip when the compressor starts, even though the motor draws a large surge. If it does trip, the breaker is either failing, the wire is damaged, or there is a short in the refrigerator's cord or motor. Do not replace the breaker with a larger one; instead, have an electrician inspect the circuit and the refrigerator to find the real problem.

Do I need a GFCI outlet for my refrigerator?

No. GFCI (ground fault circuit interrupter) outlets are required in kitchens near sinks and countertops to protect against shock, but they are not required for refrigerators. In fact, some refrigerators do not work reliably on GFCI outlets because the outlet can nuisance-trip. If your refrigerator is on a GFCI outlet and it keeps losing power, move it to a standard outlet on the same dedicated circuit.

What size breaker do I need if I am installing a new refrigerator in an older home?

Use the breaker size that matches the existing wire gauge. If the wire is 14-gauge, use a 15-amp breaker. If it is 12-gauge, you can use either 15-amp or 20-amp. If you do not know the wire gauge and the existing breaker is working, keep the same breaker size. If you want to upgrade the circuit, have an electrician check the wire first to make sure it is safe to do so.