If you look in the code book, 12 AWG wire is legal to 30 amps if you can run it at 90 degrees C.
Wire Gauge or Type Rated Amperage Common Uses
—————— ————– ————————————————
12-2 Romex 20 A Lighting and Outlet Circuits, refrigerator
10-2 Romex 30 A Electric water heater, baseboard heaters
10-3 Romex 30 A Electric Clothes Dryer
6/3 Cu Range Cable 50 A Range, Heatpump, On-Demand Electric Water heater
Thereof, Can 12 gauge wire handle 25 amps?
A 12 gauge wire is rated for 25 amps. … 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.
Also to know is, How many amps can 12 gauge wire handle? 20 amps
Subsequently, question is, Can 12 gauge wire handle 40 amps? “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].”Sep 18, 2017
Also, How many amps can 12 gauge wire handle at 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.
How many amps does a 12 gauge wire hold?
20 Amps
How many amps can a 12 gauge wire handle?
20 amps
Is it OK to use 12 gauge wire on a 15 amp circuit?
Because it’s thinner and lighter, 14-gauge wire is easier to run than 12-gauge wire. However, 12-gauge wire is acceptable on both 15- and 20-amp circuits, so some electricians use it exclusively when wiring a house.
What size wire is needed for 30 amps?
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.
What size wire do I need for a 15 amp circuit?
14-gauge
How much amperage can a 12 gauge wire handle?
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).
Can I use 8 gauge wire on a 30 amp circuit?
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].”Sep 18, 2017
What amperage is #2 wire good for?
Amperage Capacities for Standard Non-Metallic (NM) Cable
——————————————————–
6-gauge wire
4-gauge wire
3-gauge wire
2-gauge wire
Should I use 12 or 14 gauge wire?
For example, if the amp capacity of your breaker is 20 amps, you should only use 12-gauge wire, and if it’s 15 amps, the entire circuit should be 14-gauge. While you can use 12-gauge on a 15-amp circuit, it’s not recommended, and you should never use a 14-gauge wire on a 20-amp circuit.
How many amps can 12 gauge Romex?
20 Amps
How many amps can 12 gauge wire handle at 12 volts?
Example – 12 V Cable and Maximum Length and Current The maximum current in a 12 V gauge #6 (13.3 mm2) cable with length 15 m is approximately 15 amps according the diagram above.
What is 8 AWG wire used for?
Size: 8 AWG
—————– ———————-
Outside Diameter: 5.39 mm / 0.212 inches
Weight: 0.069 lbs per ft
Don’t forget to share this post 
References and Further Readings :
