# Can I use a 30 amp breaker on 12 gauge wire?

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A 30-amp breaker does not operate safely with a 12-gauge wire. The minimum wire size that is allowable for use with a 30-amp breaker is 10 gauge. A smaller gauge of wire indicates a larger diameter and the ability to carry more current safely. … Twelve-gauge wire is acceptable with 20-amp or smaller circuit breakers.

## Can 12 gauge wire handle 30 amps?

Can I use a 12 gauge wire on a 30 amp circuit? – Quora. No. 12 gauge wire is rated for a maximum of 20 amps. You need a minimum of 10AWG wire for 30 amps.

## What size breaker do I need for 12 gauge wire?

RULES OF THUMB. Many techs will repeat these rules of thumb and rely on them in all circumstances: “Twelve-gauge wire is good for 20 amps, 10-gauge wire is good for 30 amps, 8-gauge is good for 40 amps, and 6-gauge is good for 55 amps,” and “The circuit breaker or fuse is always sized to protect the conductor [wire].”

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## Can I use a 25 amp breaker with 12 gauge wire?

A 12 gauge wire is rated for 25 amps. NEC only allows for it to be protected at a max of 20 amps (unless following an exception for motor loads). This application requires a 25 amp circuit breaker.

## What size wire do you need with a 30 amp breaker?

Any circuit fused for 30 amps must use a minimum of 10 ga copper or 8 ga alu. Longer runs may require an upgrade of wire size.

## How far will 12 gauge wire carry 20 amps?

The total circuit would be about 60 -70 feet in length. It would only be supplying about 5 outlets and one light. It would be a light load, running small things, no heaters or med/large equipment. #12 provides reasonable performance up to about 100′ with general loads like you describe.

## What is the maximum amperage for 8 gauge wire?

8 AWG may carry a maximum of 70 Amps in free air, or 50 Amps as part of a 3 conductor cable.

## Should I use 12 or 14 gauge wire?

If you’re wiring a circuit on which there are both lights and outlets, or you just aren’t sure which wire gauge to use, you can’t go wrong by choosing a 12-gauge wire. It’s not quite as flexible as a 14-gauge wire, and it costs a bit more, but it’s always a safe choice on a 15- or 20-amp circuit.

## How many outlets can you run on a 12 2 wire?

For general use receptacles, In commercial buildings it is limited to 180VA per duplex or single receptacle, therefore on a 12/2 Romex cable not otherwise subject to ampacity derating and protected by a 20 amp circuit breaker, that would allow a maximum of 13 receptacles.

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## Is a double pole 30 amp breaker 60 amps?

Single-pole breakers are rated for 120 volts and 15 or 20 amps. … The breakers themselves are relatively narrow and occupy a single slot in the home’s breaker box. Double-pole breakers, on the other hand, are typically rated for 20 to 60 amps and supply 240-volt power to large appliances, like electric dryers and ranges.

## What gauge wire should be used with a 20 amp circuit?

A 20-amp circuit, protected by a 20-amp breaker or fuse, must be served by 12-gauge or 10-gauge wire.

## Can you put a 30 amp breaker in place of a 20 amp breaker?

The answer is, “No, do not put a 30 Amp breaker in place of a 20 Amp breaker because the wiring is most likely’sized’ for the 20 Amp load and -may- overheat if a 30 Amp load is used with wiring sized for a 20 Amp load.”

## What gauge wire should I use for 240 volts?

Use 12-gauge wire for a 20-amp circuit, 10-gauge for 30 amps, 8-gauge for 40 amps, and 6-gauge for 50 amps. Check local codes for requirements.

## What is a double-pole 30 amp breaker used for?

Double-pole breaker

Uses the entire 240 volts available to the panel. The 15-amp and 20-amp breakers often handle baseboard heaters, 30-amp serve water heaters and electric dryers, 40- and 50-amp are for electric ranges, and the 70-amp could serve a large air conditioner or a subpanel.

## What is a 30 amp breaker used for?

The 15-amp and 20-amp breakers are used for baseboard heating, the 30-amp breakers are used for water heating, the 40- and 50-amp breakers are used for electric ranges, and the 70-amp breakers are used for air conditioning.

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## What wire do I need for 220V 30 amp?

A 30 Amp circuit is needed for most 220V tools. You will need to run a 10-2 to the outlet. 10-2 copper wire is usually good for up to 40 Amps on start loads and 35 Amps on constant load.