# Can I mix 12 and 14-gauge wire on a 20 amp circuit?

## Can I mix 12 and 14-gauge wire on a 20 amp circuit?

It’s perfectly safe to use it. Don’t worry about confusing future workers. If they want to add something to the circuit, they will have to go turn off the circuit breaker first, and then they will see they are working with a 15 amp circuit.

### Can you use a 14-gauge wire on a 20 amp breaker?

14 AWG must be protected at 15A, according to NEC 240.4(D)(3). 14 AWG can’t be used on a circuit with a 20A breaker. The screw terminals are the better choice if you want to put 15 Amp receptacle on a 20 Amp circuit with 12 gauge wire. You can use the side terminals.

What size breaker do I need for 14-gauge wire?

14-gauge wire has a smaller cross-sectional area than 12-gauge, which would cause it to overheated on a circuit controlled by a 20-amp breaker. A 15-amp breaker will trip before a 14-gauge wire does.

What is the minimum wire size that can be connected to a 20 amp breaker?

Building codes based on the National Electrical Code prohibit the use of 14-gauge wire anywhere on a 20-amp circuit. All wiring in such circuits must be 12-gauge or larger.

## How far can you run 12 gauge wire on a 20 amp circuit?

You can run a 12 gauge wire up to 70 feet on a 15 amp circuit. That number drops to 50 feet if you run 12 gauge wire on a 20 amp circuit.

### How long can you run 14 gauge wire?

50 feet
Sizing the Conductors As an example, for a 120-volt circuit, you can run up to 50 feet of 14 AWG cable without exceeding 3 percent voltage drop.

Should I use 12 or 14 gauge wire?

As long as you don’t put too many lights on the light circuit, you can usually control that circuit with a 15-amp breaker, as well as wire it with a 14-gauge wire. On the other hand, an outlet circuit controlled by a 20-amp breaker requires a 12-gauge wire.

How many amps can a 14 gauge wire handle?

20 Amps
According to the “powers-that-be”, a 14 gauge wire can carry 20 Amps, but only as a built-in safety measure.

## Will 12 gauge wire carry 20 amps?

RULES OF THUMB “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].”

### How far can you run #12 wire?

How far can I run 14 gauge wire?

As an example, for a 120-volt circuit, you can run up to 50 feet of 14 AWG cable without exceeding 3 percent voltage drop….For 120-volt circuits:

14 AWG 50 feet
8 AWG 76 feet
6 AWG 94 feet

How far can you run 12 2 wire on a 20 amp breaker?

After these distances, the circuit will go over the recommended 3% voltage drop. You can run a 12 gauge wire up to 70 feet on a 15 amp circuit. That number drops to 50 feet if you run 12 gauge wire on a 20 amp circuit.