What Size Of Wire That Suits 200 Feet Away 100 Amp Sub Panel?

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Wire That Suits 200 Feet Away 100 Amp Sub Panel – The main reason why every house owner installs sub-panels is to extend the main panel circuit space. But, at the same time, if you want to connect a sub-panel located at a distance, you feel hard. Especially if you do not know about this, then you will certainly feel hard.

Here is where you need an expert who can easily handle the electrical work. Professionals will work perfectly and suppose if you need to connect 100-amp sub-panel, you must know wire size for 100 amp sub panel 200 feet away so then it will offer power completely. If you fail to mount it right, it will overheat, and some other issues will occur.

In general, 100-amps need a right size breaker. At the same time, you can even use 1 AWG copper or 2/0 aluminum conductors. No matter what, you need the right amount of wires to carry the power.

Stare at the underneath article to know the right wire size and some essential things to consider while working on electricity.

Safety Measures To Consider

Undoubtedly, safety is a primary concern if you choose to work on electricity. In such a case, if you are working in home electricity, it is a must to know the layout of the main panel as well as the subpanel.

At the same time, check how the power enters and don’t forget to turn it off while connecting as well as disconnect.

Even a small mistake will lead to huge accidents such as overheating, potentially resulting in a fire. In particular, while working in wires that carry 100 amps, you should be very careful. Instead of wasting your life, you can waste time. It does not take much time to turn off the circuit. So, never forget to do that at any cost.

At the same time, thru you have some knowledge in the electrical work. Never forget to look at the tutorial video or connect with a professional electrician who will help you in all situations. Avoid kids come inside the working space since there are some unsafe parts present in the main circuit.

What Is The Right Size Of Wire Or Conductors You Need?

If you have a 100-amp subpanel, you surely need 4 AWG 75-degree C or 90 Degree C copper wire in conduit for a 100 a breaker. At the same time, make sure the breaker can also use for 17 Degree C wire. In short, you need four-wire service such as two hots, a neutral, and equipment ground.

Plus, as mentioned before, you can use 1 AWG aluminum or 3 AWG copper for 100-ampere circuits. The reason why you must focus surely means choosing the wrong size will affect the power quality. That’s why you ought to increase the conductor size.

You must decrease the voltage up to 3% or less of the supply voltage. Based on the volt supply, you are required to reduce, or else you can use less.

How Are Wires Sized And What Is Wire Gauge?

Understand one thing that every single wire is used for various purposes. That’s why you must know the wired category. So, then you will be allowed to pick the right one.

At the same time, measuring the wire size is called the gauge. The measurement is what defines the amount of power it will carry.

Wire gauge defines the physical size and the current carried by the wire without wasting a lot of power. The wire will be provided with a numerical designation inversely proportional to the diameter of the conductors.

If the wire gauge number is small, then it will have a large diameter. In general, the sizes are 2-, 6-, 8-, 10-, 12-, and 14-gauge wire.

That’s why it is important to have an eye on the size of the wire to determine that the amount of current it will carry without any loss. Gauge rank defines the resistance of the wire and its weight per unit length.

Why Want To Use Large Length Wire?

If you are considering measuring the wire, then all you ought to concentrate on is the length. The reason is that the wires consist of resistance, and they use a lot of power.

Thus, if you use a lengthy wire, then it will use more resistance. All because it will surely draw more power from the source to reach the outlets.

That’s why in the scenario when you want to wire for your 100-amp sub-panel longer than 20 feet, certainly you need 1-gauge wire. If you mess between two different gauge sizes, always remember choosing a bigger size is best.

At the same time, avoid using extremely larger all because you ought to use up much more for that. Also, stop using very small as well since it will create deadly issues. Thus, always go for the right wire size.

What Are Electrical Subpanels?

Of course, you choose to start work with electrical subpanels, and you must know what it is. In general, the electrical subpanels are secondary circuit breaker panels that will feed off the main panel. The purpose of using an electrical subpanel are two.

The foremost reason is that the main circuit breaker panel is provided with full of breakers. Plus, if there is no space for the additional circuits set up. The second one is that to put the control for specific circuits in one place.

What About The Functionality Of Subpanel?

Almost every large house has two main panels since each will take power from the main utility. This method suits well for houses with 300 amp or 400-amp service. It is provided with one 200-amp main panel and a 100-amp panel. It is described as a subpanel.

The subpanel is a smaller circuit panel breaker available with four to 24 slots fed from a 240-volt circuit breaker in the main panel. It is called a feeder breaker. In most cases, though, an actual subpanel is a panel breaker of a smaller circuit with anywhere from 4 slots up to 12.

Those slots are fed from the circuit breaker (240 volts) into the main breaker or the feeder breaker. As mentioned before, the subpanel is the smaller version of the main panel, available with the same two hot bus bars.

Subpanel provides the main breaker that will stop you from reaching the main panel during power issues. The feeder breaker is there instead of the main shutoff.

Way That The Subpanel Get Connected?

On setting up a subpanel, an electrician will usually start the feeder cable from the main panel to the subpanel. It is a three-wire cable provided with three insulated conductors and bare copper ground wire.

This cable has a wire gauge for the subpanel that needs four copper wires, two aluminum wires.

The professionals will connect the two hot wires from the feeder cable to the lugs on the hot bus bards in the subpanel. Then, look at the neutral wire to the neutral bus bar and the bare copper grounding wire to the grounding bud bar.

What Is Hot Feeder Wires?

In this step, the professional will install the hot feeder wires up to the new 240-volt breaker. Along with that, it will connect with the ground and neutral wires to the bus bars present in the main panel.

Finally, it would help if you broke the feeder breaker into one of the open double slots back on the main service panel. Now, you can use the subpanel on the circuit breaker.

Things To Consider for Right Size Of Wire for 100 Amp Sub Panel

Before you start to do this procedure, you ought to look at some points. Firstly, make sure your panel has four conductors: two hot conductors, the neutral, and the ground. Then, in the secondary panel, the neutral or grounded conductors and the bus bar must be separated.

Confirm that the grounding electrode system is mounted properly. At the same time, bond your grounding connector to this electrode system. In case if you have any doubt, then consult an expert.

General Capacity Problems

In general, there are two capacity issues that you want to check if you choose to set up a subpanel. The first issue is that the subpanel needs to be in an appropriate amperage capacity based on your area and the circuits it works.

When it comes to the second capacity issue that wants to check is the main service should be in the size that will serve enough power to the included subpanel. That’s why NEC (National Electrical Code) offers a way to estimate the wattage load and calculate the load requirements for the subpanel.

All About Older Main Service

If you have an older 60-amp or 100-amp main service, then a service upgrade is required for sure. It wants to upgrade to 150-amps or 200 amps before installing the new subpanel, so then enough power will get delivered.

Most importantly, it is required when you choose to set up a subpanel to offer the circuits to a major room addition. Be it is any room, the power consumption will increase. On the other hand, if you have a 60-amp to 100-amp subpanel, you have no issue; however, a service upgrade is a must.

Get An Electrician

If you are considering working in electricity, then a little bit of knowledge is deadly. You need to contact an electrician. An electrician will properly install the subpanel by considering all the service upgrades. It is best to spend some money instead of spending your lives.

Remember It

Unquestionably, choosing the right wire size is crucial, but here is where most people will get mess a lot. Even a professional electrician will get confused about this thing.

If you are looking for the right wire size for a 100-amp sub-panel 200 feet away, remember that a 1-gauge wire is appropriate.

It would help if you did not compromise on the gauge size. Choosing too small will cause fire, overheat ad all. On the other hand, choosing too large will ask you to spend a lot of money. Henceforth, you must hire a professional.


So, now you have come to know the right wire size for 100 amp sub panel 200 feet away to get enough power quality without any loss.

Home Base Project Team
Home Base Project Team
At The Home Base Project, we offer practical, real-life tips and inspiration about DIY, decorating and gardening. The Home Base Project provide the best information about home renovation and design, connecting home design enthusiasts and home professionals across the world.


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