Yes, you can use 10 AWG copper conductors with a 20 ampere breaker. The smallest size conductors you could use with a 20 ampere breaker, are 12 AWG copper conductors. There’s no problem using larger conductors, other than cost to you, and difficulties associated with working with thicker conductors.

How far can you run 10 gauge wire on 20 amp circuit?

How Far Can You Run 10 Gauge Wire? You can run a 10 gauge wire up to 85 feet on a 20 amp circuit. If you opt to use this type of wire on a 15 amp circuit, it can run up to 115 feet. After these distances, the circuit will go over the recommended 3% voltage drop.

What size breaker can 10 gauge wire handle?

30 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].”

What size wire will fit in a 20 amp breaker?

12 AWG

A 20 amp breaker requires a wire size of 12 AWG. This is the smallest wire size you should use for a 20 amp circuit breaker since an AWG gauge of 12 represents 20 amps.

When should I use 10 gauge wire?

10-gauge are used in electric clothes dryers, 240-volt window air conditioners, electric water heaters supporting 30 amps. 6-gauge are used for cook tops and ranges carrying 40-50 amps. 4-gauge are used for electric furnaces and large electric heaters protected at 60 amps.

Can I use 10 gauge wire on a 15 amp breaker?

Only for 15 Amp items, 14 or 888-282-0465 888-282-0465 888-282-0465, or smaller for 20 Amp ones. The #10 wire wouldn’t fit into a back wired receptacle and wouldn’t work with screw terminals or devices with wired connections.

How far can you run 10 gauge wire on a 30 amp breaker?

10-gauge wire can accommodate a 30-amp breaker until you reach 150 feet. At 150 feet or more, you should get 8AWG or 6AWG wire.

How many amps will a 10 gauge wire carry?


#10 Gauge THHN Copper Stranded Wire is the most popular single conductor copper wire and RATED FOR 30 AMPS.

Can I use 10 gauge wire on a 30 amp circuit?

A 30-amp circuit breaker requires a minimum of 10-gauge wire for the conductor, according to the American Wire Standard, or AWS. Using a wire larger than 10-gauge on a 30-amp circuit can pose a significant fire and safety risk. You can always use a lower gauge wire, but never bigger.

How many amps can a 10 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)
50 10 8
60 10 6
70 10 6

Can I connect 10 gauge wire to 12 gauge wire?

There is no problem at all connecting a 10 gauge wire to a 12 gauge wire. Make sure that the current in the wire does not exceed 120 volts. Use a 20 amp circuit protector to make sure that the connection is safe. The combination of different gauges is a perfectly safe and normal procedure.

What is 10 gauge stranded wire used for?

10 Gauge Stranded. 10 Gauge wire solid is the most frequent type of wiring used in construction and construction projects. It can also be employed in electronics when you get down to the tiniest gauge sizes.

Will 10 gauge wire carry 50 amps?

A 10-gauge bare copper wire can carry a 50-amp load, but the resistance in the cable will cause it to heat up substantially.

What is 20amp wire?

Why Wire Gauge Is Important

Wire Use Rated Ampacity Wire Gauge
Low-voltage lighting and lamp cords 10 amps 18-gauge
Extension cords (light-duty) 13 amps 16-gauge
Light fixtures, lamps, lighting circuits 15 amps 14-gauge
Kitchen, bathroom, and outdoor receptacles (outlets); 120-volt air conditioners 20 amps 12-gauge

What gauge wire do I need for 220 volts?

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.

What size wire do I need to run 50 amps 100 feet?


For every 100 feet, voltage drops by 20%.
Example: 50 amp wire is usually the 6 AWG (we require at least 62.5A and 6 AWG can handle 65A). If you have to power an electric device 100 feet away, you need 20% amps more. Instead of 62.5A, you’re looking at 62.5A × 1.2 = 75A.

Can I use 8 gauge wire for a 50 amp breaker?

Can You Use 8-Gauge Wire On A 20,30,40,50 Amp Breaker? You can use 8-gauge wire on a 20,30,40 and 50-amp breaker. It will only be a problem if it exceeds 55 Amps.

What is 10 2 Romex used for?

NM-B is primarily used in residential wiring as a branch circuit for switches, outlets and other loads. NM-B may run in air voids of masonry block or tile walls where locations are not damp.

What size wire do I need to run 100 amp Service 150 feet?

2/0 AWG wire

100 amp service 150 feet away from the sub panel requires #00 AWG wire (also known as 2/0 AWG wire). This wire has a median ampacity of 175 amps; more than enough than the required minimum 162.5 ampacity.

What wire size do I need to go 100 feet for a 100 amp service to a workshop?

For a 100 ampere circuit, the conductors will likely be required to be 3 AWG copper or 1 AWG aluminum.

What size wire is needed for a 100 amp sub panel?

The cable must have a wire gauge sufficient to the amperage of the subpanel—a 100-amp subpanel requires #4 copper wires or, more commonly, #2 aluminum wires, for example. (Aluminum is often used for feeder cables because the cost is typically much lower than that of copper wires.)