**What size breaker do I need for 8 wire? 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].”18 Sept 2017**

**Can 8 gauge wire handle 50 amps?** 8 AWG may carry a maximum of 70 Amps in free air, or 50 Amps as part of a 3 conductor cable.

**Can I use 8 gauge wire on a 30 amp breaker?** The 12-gauge wire is good for 20 Amps, the 10-gauge wire is good for 30 Amps, the 8-gauge wire is good for 40 Amps, and the 6-gauge wire is good for 55 Amps.

**What size wire should I use for a 50 amp breaker?** 50 AMP Wire Size

For a maximum of 50 amps, you’ll need a wire gauge of 6. Fifty amp breakers are most often used to power many different appliances.

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## What size breaker do I need for 8 wire? – Related Questions

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

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].”

### What size of wire do I need for a 60 amp breaker?

For 60 ampere breakers, electricians and professionals suggest using a wire size gauge ranging from 6 AWG to 4 AWG. All household wires have a rating of at least 600V, so only amperage really matters when it comes to determining wire gauge.

### What size wire is good for 100 amps?

When it comes to the lines connecting master and secondary panels, where the line will carry as much as a full 100 amps, use a 2-gauge non-metallic sheathed electrical cable. The cable must contain one or two hot wires depending on your needs, one neutral wire, and one ground wire. Each wire should be 2-gauge in size.

### How many amps is 8 AWG Thhn good for?

#8 Gauge THHN Copper Stranded Wire is the most popular single conductor copper wire we carry and is RATED FOR 55 AMPS 90°C.

### What wire size do I need to go 100 feet for a 60 amp service to a workshop?

If the circuit is 100 amp or less you have to size the conductors based on the 60-degree celsius column unless the breaker and the equipment terminations are rated for 75 or 90 degrees. You have to use a #4 conductor to feed a 60 amp circuit.

### What wire is needed for 220v 30 amp?

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. In your case, use at least 10 copper for your welder regardless how far it is from the breaker panel.

### What size breaker do I need for 6 3 wire?

6/3 is normally protected with a 60-amp breaker. Since there are no 55-amp breakers, code allows you to round up to the next larger standard size.

### Can you use 14 gauge wire on a 30 amp breaker?

Since the normal type of outlets don’t have a 30 amp capacity, you can’t use a 30 amp breaker on them even if you have 30 amp wiring (usually #10), and meet the electrical code.

### How far can you run a 30 amp wire?

As long as it’s rated for 30 amps, there is no maximum distance. The question should not be how many feet, but how many cords. For example, two 50 foot, 30 Amp extension cords should be considered to have less capacity than one 100 foot extension cord.

### Can I use 8 gauge wire on a 20 amp circuit?

The rule of thumb that techs will usually go by is that for a 30 amp circuit breaker, 10-gauge wire is the right size to go with. For a 40 amp you need a 8-gauge wire size and for a 20 amp, you will need a 12-gauge wire size.

### How far can you run a 50 amp wire?

To run 50 amps at 150 feet, you can use No. 4 AWG. The larger the wire diameter is defined by the smaller numbers on a wire.

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

What is the right wire size for 100 Amp service 150 feet distance? You should get 2/0 AWG Copper wire or 4/0 AWG Aluminum wire for single-phase circuits. And, 1/0 AWG Copper wire or 3/0 AWG Aluminum wire if you have three-phase circuits. For these wires, the average voltage drop should be 3%.

### What wire is needed for 220v 50 amp?

So, that being said, what gauge of wire would you use for a 50 amp 220v? You need to use a wire gauge of 4 for aluminum wire if you use 50 amps. Copper wire requires that you use a minimum gauge of 6 at 50 amps. Use the correct wire gauge when you run 50 amps or 220 volts so that you don’t pull too much current.

### Can I use a 50 amp breaker for a 40 amp stove?

Any household cooking appliance rated 12kW or less can be used on a 40A circuit. Also, to answer the original question, yes, a 50A receptacle can be used on a 40A circuit wires with #8.

### Does 8 3 wire have a ground?

Cable. The 8/3 cable (also with ground, meaning 4 wires in total) will suffice for 40A, the breaker you already have there. If you need to extend the cable, remember you must make splices inside a junction box!

### Can I replace a 30 amp breaker with a 60 amp breaker?

It’s necessary to have at least 6 wire for a 60 Amp breaker. I believe the OP is thinking of doubling the capacity of the single breaker. When he returns with pictures, we’ll see. The answer isn’t yes.

### What size copper wire do I need for 60 amps?

While it’s common to use a 6-gauge wire for 60-amp breakers in practice, it’s best to use a 4-gauge wire if you’re installing a 60-amp subpanel.

### What is a 60 amp breaker used for?

The Square D by Schneider Electric Homeline 60 Amp Two-Pole Circuit Breaker is used for overload and short-circuit protection. Homeline load centers are compatible with this breaker.

### What size wire is good for 200 amps?

Wire Sizes For 200 Amp Service

Wiring 200 amp service requires either #2/0 copper wiring or #4/0 aluminum or aluminum clad wiring. Which wire used is determined by the voltage drop and length of the wiring. Many electrical contractors opt to use #4/0 aluminum or copper-clad wire.

### How many outlets can be on a 15 amp breaker?

Technically, you can have as many outlets on a 15 amp circuit breaker as you want. However, a good rule of thumb is 1 outlet per 1.5 amps, up to 80% of the capacity of the circuit breaker. Therefore, we would suggest a maximum of 8 outlets for a 15 amp circuit.

### How many amps can a 30 amp breaker handle?

Keep loads within the safe maximum for each breaker. The safe maximum calculation is 80%. If breaker is rated 30 amp, then 30 x . 8 = 24 amp safe maximum.