Subpanel Circuit Breaker Sizing 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.

## What size breaker do I need for a subpanel?

Based on your question, since you will be having a subpanel, **you want the breaker feeding the subpanel to be sized for the subpanel or slightly smaller**. So if you purchase and install a 200A subpanel, then the breaker should be 200A. If you use a 125A subpanel, then use a 125A breaker.

## What size wire do I need to run a 100 amp subpanel?

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.

## What size wire do I need to run a 60 amp subpanel?

In short, the wire size for a 60 amp sub-panel 150 feet away is **3 AWG gauge wire**.

## What wire do you use for a 200 amp subpanel?

The **250 KCMIL** wire is the perfect size wire for 200 amp service because it has 255A ampacity (a minimum of 250A ampacity requirement is satisfied).

## Can a 60 amp breaker feed a 100 amp sub panel?

**You can feed a 100 Amp panel with a 60 Amp breaker**. Keep in mind that the sub panel needs to be rated above the breaker size.

## Can you run a 100 amp sub panel off a 50 amp breaker?

It’s a rating.

It’s the same with subpanels: The “100A” is a maximum rating. Do not exceed 100A. However, **you certainly should exceed your feed-breaker size of 50A**. Even if 50A panels existed, they would be very small in terms of numbers of spaces.

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

If you check the wire size chart (you have the link in the introduction), the **#0 AWG** wire (also known as 1/0 AWG wire) has 150 ampacity. That means that #0 AWG wire is the perfect size wire for 100 amp service 100 feet away.

## What size wire will a 100 amp breaker accept?

For 100 AMP service, you’ll need a **#4 AWG copper wire or #2 AWG aluminum or copper-clad wire**. Make sure to limit your voltage drop to 3% regardless of distance.

## Can 4 AWG handle 100 amps?

#4 copper is good for 85 amps which means that you can go up to the next standard size which is 90 amps. **If you want to use a 100 amp OCPD you will need to increase your conductor size #3 copper**.

## Can you run a 200 amp sub panel off a 200 amp panel?

Is feeding a 200A sub from a 200A main legit? **Yes, and you don’t even need another 200A breaker**. The 200A breaker alread present in the panel will suffice, and so you can use a subfeed lug kit as DrSparks advises.

## What size wire do I need to run 200 amp Service 200 feet?

For a 200 amp service, you’ll need: **#2/0 copper wire, or**. **#4/0 aluminum or copper-clad aluminum wire**.

## How do you wire a 200 amp sub panel from a 200 amp main panel?

Quote from Youtube video: *In front of me you see two main lugs that your main lugs it ties in the two black wires though the black and red in a black wire.*

## How many breakers can you put in a 60 amp sub panel?

Modern 60-amp electrical panels are purpose-built as sub-panels and generally only have **8 to 10 slots** available for circuit breakers.

## How many amps is #6 wire good for?

6 gauge wire can handle anywhere from **32 amps to 60 amps** (check 6 Gauge Wire Amps Chart further on). This depends on copper vs aluminum wire and temperature.

## What size wire do I need to run 60 amps 100 feet?

What size wire should I use for a 60 amp subpanel? You can get away with 6 AWG when you have a short run of wire, however, due to voltage drop, if you ever decide you want to go more than 100 feet then a **4 AWG** is the size you should choose.

## Can you run a 100 amp sub panel off a 100 amp main panel?

Let me try and answer some of your questions. First the panels you are looking at that are rated 100A simply means **you can use them for any application up to 100A**.

## Can you run a 200 amp sub panel off 200 amp main?

Is feeding a 200A sub from a 200A main legit? **Yes, and you don’t even need another 200A breaker**. The 200A breaker alread present in the panel will suffice, and so you can use a subfeed lug kit as DrSparks advises.

## Can I run a 100 amp sub panel off 200 amp main?

Can you add a 100 amp breaker to your main panel? **Yes you have 12 slots** the double pole breaker will only take 2 slots.

## How many breakers can you have in a 30 amp sub panel?

The amount of current that is required for the connected loads can only be supported by a 30 Amp sub-panel. The maximum quantity of branch circuits can be determined with a load calculation. **Two 15amp breakers or one 15amp and one 20amp** can be used on a 30amp circuit.

## Can I run a sub panel off a 30 amp breaker?

**You need 10-gauge, three-conductor cable to wire a 30-amp subpanel**. This cable has two hot wires (usually colored red and black), a white neutral wire and a ground wire, which is usually bare but could be green. It carries electricity at 240 volts, so you must treat it differently than regular 120-volt electric cable.

## Can a 30 amp breaker feed a sub panel?

To summarize the last 8 comments: **There is nothing wrong with having 4 15amp circuits in a sub-panel that has a 30 amp main breaker**. You can use max 15 amp on any one circuit, and max 30 amp all combined.

## What wire do I use for a 30 amp breaker?

A **10-gauge wire**

If you look into a 30 Amp wire size chart online, the recommended size is a minimum of 10-gauge wire. A 10-gauge wire can safely carry the amount of current loads supplied by a 30-amp circuit.

## Can you run 12 gauge wire on a 30 amp breaker?

**You should not use a 30-amp circuit breaker on a 12-gauge wire**. The circuit breaker installed on a circuit is of a specific size to protect a certain wire gauge. A larger breaker on a thinner wire will allow more current over the wire before tripping.

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

How far can you run 10 gauge wire for 30 amps? 10-gauge wire is usually used for short 30 amp runs. If you plan on going over **150 feet**, 8-gauge wire or thicker will be needed.