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No a #12 wire is only rated for 20 amps. The 40 amp breaker will not protect the #12 wire. A 40 amp breaker should have a #8 wire connected to it which is rated at 45 amps. The only time that a breaker is allowed to be bigger that the wire size rating according to the electrical code is when a motor is connected to the breaker. This is to stop the 300 percent inrush of the motor full load amps from nuisance tripping a smaller sized breaker.

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13y ago
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15y ago

20 amp by code is the max. for household. Could you??? Depends on the type or the thermoplastic insulation class.

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15y ago

No. # 12 wire is rated at 20 amps. You need #10 wire for 30 amps.

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11y ago

No, you will need to use 10 gauge wire or change the breaker to a 20 amp breaker.

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14y ago

20 amp

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12y ago

Yes.

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Q: Could you use a 12gauge wire for a 25 amp breaker single pole?
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Should you buy double pole breaker or single pole?

Use of a double pole breaker or a single pole breaker depends entirely on the application. If you don't know about the application, contact a qualified electrician in your area.


Can a double pole 20 amp breaker be used with 12-2 wire for a single 220 circuit?

The term "double pole" usually means a breaker with 2 handles that attaches in the space as a normal single pole breaker. If this is what you mean, no, you cannot. There is no potential, or voltage, between the wire terminals. If by "double pole" you mean what is usually called a 2-pole breaker, which is a breaker with 2 handles that attaches in the space of 2 single pole breakers, then yes, you can use this breaker and 12/2 wire to produce a 220v circuit.


Can you use two 15 amp single pole breakers in place of a double pole 30 amp breaker?

Yes. An everyday occurrence of this circuitry is in your kitchen counter split receptacles. The top half of the receptacle is a 15 amp circuit and from the same breaker the bottom half of the receptacle is another 15 amp circuit. A two pole single handle breaker is a common trip. If one of the circuits fed from the breaker faults the other connected circuit will shut off also. If you are talking about slot position in a breaker panel, you can remove the two pole breaker and install two single pole breakers.


What size breaker to use for a hand dryer its 120v 20amps?

Single pole 20 amp breaker.


Can a 220 VAC breaker be single pole or does it have to always be a double pole breaker?

U.S. 240 VAC breakers are always double pole since they are protecting two legs of the circuit.

Related questions

Should you buy double pole breaker or single pole?

Use of a double pole breaker or a single pole breaker depends entirely on the application. If you don't know about the application, contact a qualified electrician in your area.


What is the Largest amperage single phase 120 volt breaker made?

6000amps <<>> The above answer must have big lugs to accommodate 6000 amp capacity wire. In my breaker catalogue the largest 120 volt single pole breaker is 70 amps, 277 volt single pole is 150 amps and 347 volt single pole is 100 amps. The 120 volt single pole breaker occupies two opposed slots because of its length.


Can a double pole 20 amp breaker be used with 12-2 wire for a single 220 circuit?

The term "double pole" usually means a breaker with 2 handles that attaches in the space as a normal single pole breaker. If this is what you mean, no, you cannot. There is no potential, or voltage, between the wire terminals. If by "double pole" you mean what is usually called a 2-pole breaker, which is a breaker with 2 handles that attaches in the space of 2 single pole breakers, then yes, you can use this breaker and 12/2 wire to produce a 220v circuit.


What size breaker to use for a hand dryer its 120v 20amps?

Single pole 20 amp breaker.


Can you use two 15 amp single pole breakers in place of a double pole 30 amp breaker?

Yes. An everyday occurrence of this circuitry is in your kitchen counter split receptacles. The top half of the receptacle is a 15 amp circuit and from the same breaker the bottom half of the receptacle is another 15 amp circuit. A two pole single handle breaker is a common trip. If one of the circuits fed from the breaker faults the other connected circuit will shut off also. If you are talking about slot position in a breaker panel, you can remove the two pole breaker and install two single pole breakers.


Can a 220 VAC breaker be single pole or does it have to always be a double pole breaker?

U.S. 240 VAC breakers are always double pole since they are protecting two legs of the circuit.


How do you define a pole in circuit breaker?

A pole In a circut breaker refers to the number of circuts it controls, single pole only controls one, double controls 2 at same time


How many switches can you wire on a single pole breaker?

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How do you know if your single pole is 240 or 120?

A single pole breaker will be 120 volts. But to make 100% sure test it with a volt meter.


How many pole breaker for air condition?

If the power requirement is 120 volts it will be connected to a single pole breaker rated at the amperage requirement of the air conditioner. If the voltage of the air conditioner is 240 volts, then a two pole breaker will be required.


What kind of a GE circuit breaker can you use in place of a GE tandem breaker?

A GE tandem breaker can be removed and replaced with a GE single pole breaker.


What breaker will interchange with American Switch Company?

Replacement for American Switch single pole 15 amp circuit breaker