Table of Contents
Can you use 12 AWG for 30 amp?
No. 12 gauge wire is rated for a maximum of 20 amps. You need a minimum of 10AWG wire for 30 amps.
What gauge wire is required for a 30 amp breaker?
10
For a maximum of 30 amps, you’ll need a wire gauge of 10. The most common household item that requires a 30 amp circuit is a central air conditioner.
What’s the biggest breaker you can put on 12 2 wire?
20 amp
Maximum Breaker Size is 30 amps. You can use a 20 amp circuit breaker with 12/2 Romex as 12/2 wire is rated for 20 amps.
How many amps can a 12 gauge wire hold?
20 AMPS
Size & AMP Ratings
| NM, TW, & UF WIRE (Copper Conductor) | SE CABLE (Copper Conductor) |
|---|---|
| 12 AWG – 20 AMPS | 6 AWG – 65 AMPS |
| 10 AWG – 30 AMPS | 4 AWG – 85 AMPS |
| 8 AWG – 40 AMPS | 2 AWG – 115 AMPS |
| 6 AWG – 55 AMPS | 1 AWG – 130 AMPS |
How many amps can 12 gauge wire handle at 12 volts?
Maximum current (amps) in a 12V electrical circuit vs. size (AWG) and length of wire.
| American Wire Gauge (#AWG) | ||
|---|---|---|
| Length (feet) | Maximum Current (amps) | |
| 30 | 12 | 10 |
| 40 | 12 | 8 |
| 50 | 10 | 8 |
How far can you run 12v DC?
12V DC Power Drop / Max Cable Distance Chart
| 24 AWG | 12 AWG | |
|---|---|---|
| DC 300mA | 72 feet | 1,169 feet |
| DC 400mA | 54 feet | 877 feet |
| DC 500mA | 43 feet | 701 feet |
| DC 750mA | 28 feet | 467 feet |
What size wire for 30 amp service?
The minimum wire size that is allowable for use with a 30-amp breaker is 10 gauge.
What is the maximum amperage for 12 gauge wire?
A 12-gauge wire can carry between 15 and 20 amps for normal electrical wires. When wiring chassis, 12-gauge wire can carry a maximum of 41 amps along the metal conductor. The conductive part of a 12-gauge wire is 0.0808 inch in diameter.
What size circuit breaker do I Need?
Observed that the circuit breaker for AC unit is over sized (50 amp). The air conditioner specification plate calls for maximum breaker size of 20 amp. An over sized circuit breaker could result in damage to AC unit and or electrical wiring. In need of evaluation and repair by qualified electrician.
How to size a circuit breaker?
Besides, how do you determine the size of a circuit breaker? To calculate the breaker size, simply divide the adjusted wattage by 240 volts to find the rated amperage needed for your subpanel. Often, the result is not a common circuit breaker size. and you can simply round up to the next higher size of?the breaker.