# How many amps can I put in a 100 amp sub panel?

The answer to this question depends on whether you are speaking about the total number of amps that can be in the sub panel, or the number of amps it can support from incoming wires. If you are asking about the total number of amps that can be in the sub panel, then the answer is 100 amps.

This is because the amperage rating of a circuit breaker panel determines the total number of amps it can safely hold. If you are asking about the number of amps that the sub panel can support from incoming wires, then the answer is up to the amperage rating of the largest breaker in the sub panel.

For example, if the largest breaker in the sub panel is a 50 amp breaker, then the sub panel can support up to 50 amps from incoming wires. However, it is important to note that the total amperage of the outgoing circuits must never exceed the total amperage of the incoming wires.

## Can you run 60 amps to a 100 amp sub panel?

Yes, you can run 60 amps to a 100 amp sub panel, but your house circuits should never exceed the amp rating of the main. This means if the main panel is rated at 100 amps, you should have less than (but not equal to) this total of circuits.

The total of your sub panel and main panel circuits should equal 100 amps or less. Before wiring the sub panel you will need to determine the total amperage of all circuits going on the sub panel and make sure it’s less than the amperage rated for the circuit breaker at the main panel.

It is also important to ensure that the wire gauge used for the subpanel is rated for the amperage going through it, and to make sure that the breaker at the main panel is also larger than the sub panel circuit breaker.

This will ensure that the total amperage for the sub panel does not exceed the amperage for the main.

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

Yes, you can run a 100 amp sub panel off of a 200 amp main panel. Many homes have 200 amp main services, and it is relatively common to install subpanels to support various loads around the house. This is especially helpful for adding circuits to areas such as an additional bathroom, kitchen, or garage.

The 200 amp main panel will be able to provide enough power to safely run the 100 amp subpanel. It is important to check with your local building code requirements to be sure that a 100 amp sub panel is sufficient for the planned load.

In addition, it is also important to hire an experienced and certified electrician to install the subpanel correctly and safely as they are familiar with the local codes and regulations.

## Can you feed a 100 amp panel with a 200 amp breaker?

No, you cannot feed a 100 amp panel with a 200 amp breaker. This is because breakers are designed to protect electrical wires and appliances from an excessive amount of electrical current. If a breaker is too large for the panel it is attached to, then it will not trip or shut off the electricity when there is an overload and the wires could become overloaded and potentially cause an electrical fire.

Therefore, it is important to match the panel and the breaker. In the case of a 100 amp panel, you would need a 100 amp breaker in order to properly protect it from potentially dangerous electrical overload.

## How big of a sub panel can I run off a 200 amp service?

It is possible to run a sub panel off a 200 amp service, but the exact size depends on a variety of factors. The National Electrical Code (NEC) requires a sub panel to be configured such that it does not exceed the rating of the main service.

The NEC also requires that the sub panelâ€™s available short-circuit current rating must also not exceed the main services short-circuit current rating. Additionally, the sub panel must be sized so it provides a total ampacity of at least 125% of the total connected load.

Generally speaking, if a 200 amp main service is being used, the sub panel should have a maximum rating of 200 amps. Depending on the length of wire between the main panel and the sub panel, a lower amperage may be required.

For example, if the wire run is 100 feet or more, then using a 175 amp sub panel may be necessary.

Lastly, the actual size of sub panel that can be run off a 200 amp service should be determined using appropriate load calculations. This will help to ensure that all electrical equipment is sized properly and running safely.

## Does a 100 amp sub panel need a main breaker?

Yes, a 100 amp subpanel does need a main breaker. The main breaker protects the entire system against overload, and it must meet the requirements of the National Electrical Code (NEC). NEC 210. 20 states that the main overcurrent protection for a subpanel must be sized no larger than the feeder protected by it, which in this case would be a 100 amp breaker.

The main breaker also prevents power from being fed back into the main panel in the event of a fault in the subpanel, thus protecting personnel and equipment downstream. The main breaker can be built into the subpanel, or it can be externally mounted.

If it is mounted outside of the subpanel itself, it must be clearly labeled as to its purpose.

## How much does a 100 amp sub panel cost?

The cost of a 100 amp sub panel can vary depending on several factors, including the type of panel you’re looking for, where you purchase it, and any installation services you may need. Generally speaking, a 100 amp sub panel can range anywhere from around \$100 to \$350, depending on the model.

If you’re looking for a more advanced model with added features, you’ll likely find prices can go much higher. In addition, if the sub panel needs to be professionally installed, you should factor in the cost of labor, which can often range from \$100 to \$200.

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