A 15 amp breaker is a standard electrical component that is designed to protect the wiring in your home or business from overheating and causing a fire. So, how many watts can a 15 amp breaker handle?

The short answer is that a 15 amp breaker can safely handle a load of up to 1,800 watts. It depends on a variety of factors, including the type of wiring and the size of the conductor.

It is always best to consult a licensed electrician or refer to the National Electrical Code for specific guidelines on electrical wiring and safety. Follow along to learn more about the 15 Amp breaker handle.


15 Amp Circuit Handle’s Power Usage

A 15 Amps circuit can handle up to 1800 Watts for a 120 Volts supply. If the voltage supply is 220 volts, then the circuit can handle up to 3300 Watts.

It is simple to find the power handling capacity. Just multiply the rated voltage with the rated current to determine the rated power of the circuit.

There are some safety issues that are maintained while designing a circuit. That is, a circuit breaker can handle up to 80 percent of its amperage.

So, a 15 Amps breaker can handle about 12 Amps current. This is the practical side of a breaker. In this way, the watt it can handle is 1440 Watts for a 120 Volts supply.

How Many Outlets Can Be Connected In A 15 Amp Circuit?

15 amp circuit breaker

There is a rule- you can connect an outlet for every 1.5 Ampere. And with the 80 percent usage system of a breaker, you can connect 8 outlets to a 15-ampere circuit.

It is always important to measure the extent of your capacity and use wires that can handle the load. Using thinner wires will result in fire and can get melted.

Ultimately, the thing is no matter how many outlets you connect, you cannot exceed the watt or ampere limit of the circuit. Doing so, the circuit will be tripped.

For example, you cannot connect a micro-oven rated over 2000 watt in a 15 Amp circuit which can only supply an amount of 1800-watt maximum. 

And when you’re thinking of setting 30 Amp breaker in a house, you must remember it is the capacity of the wires and the devices you are using that matters.

If the wires are thick enough to handle the current and if you are using devices that consume current less than 30 Amp, it is okay to use a 30 Amp breaker for your house.

Best Practices for Using a 15 Amp Breaker

There are a few best practices to follow when using a 15 amp breaker to ensure the safety and efficiency of your electrical system:

  • Always make sure that the wattage of the appliances and devices that you are using does not exceed the capacity of the breaker. 

Overloading a breaker can cause it to trip or fail, which can lead to electrical fires and other hazards.

  • Use the proper size wire for the breaker. The National Electrical Code specifies the minimum size wire that should be used with a particular breaker size.

Using wire that is too small can cause the wire to overheat and increase the risk of a fire.

  • Avoid using extension cords or adapters to bypass the breaker. These devices can create additional electrical load on the system and increase the risk of a fire or other hazard.
  • Regularly inspect your electrical system, including the breaker panel and all wiring, to ensure that everything is in good working condition.
  • If you notice any issues, such as frayed wiring or a malfunctioning breaker, have them addressed by a licensed electrician as soon as possible.
  • Follow all safety guidelines when working with electrical systems. Wear protective equipment, turn off power to the system before making any repairs or modifications, and never touch live electrical wires.

Frequently Asked Questions (FAQs)

1. How Many 100 Watts Bulb Can Be on A 15 Amps Circuit?

You can connect about 14 bulbs of 100 watts rating on a 15 amps circuit. Though the maximum power that a 15 amps circuit should hold is 1800 watt, but as you know you always should take 80 percent of the max amperage for use.

2. Is 15 Amps A Lot of Power?

It is enough for a power strip to connect computer, TV or stereos. But it may not be a lot of power to connect your microwave or other heavy consuming appliances but enough for average usage.

3. Can You Replace A 15 Amps Circuit with A 30 Amps Breaker?

You should never replace a 15 amps circuit with a 30 amps circuit breaker. In a 15 amps circuit the wires used are designed for loads that resembles the circuit.

If you use a 30 amps breaker instead, the current flow will increase in the circuit which may exceed the capacity of the wire. Thus, the wire may get melted and catch fire.

4. Can You Run a Refrigerator on A 15 Amps Circuit?

Yes, you can run a refrigerator on a 15 amps circuit. But it is recommended to use it individually for the refrigerator as it draws in a lot of current. So, while using such appliances always use a direct connection instead of connecting through a strip of outlets.

5. Can You Connect a Power Strip to A Surge Protector?

Yes, you can connect a power strip to a surge protector. The amperage of both of these devices should match otherwise it will be meaningless to add a surge protector. Choosing the right surge protector for the power strip is vital.

You can connect about 14 bulbs of 100 watts rating on a 15 amps circuit. Though the maximum power that a 15 amps circuit should hold is 1800 watt, but as you know you always should take 80 percent of the max amperage for use.


In conclusion, a 15 amp breaker helps to protect against overloading and preventing fires and other hazards. It is important to understand the wattage capacity of your 15 amp breaker.

By following these guidelines and tips in the article and consulting a licensed electrician when necessary, you can help to keep your electrical system running smoothly and safely.

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