What Wire Size is Best For a 100 Amp Sub Panel Thats 200 Feet Away?

When you require a wire that can support 100 amps, 1-gauge is usually your best bet. This helps avoid potential risks associated with inefficient circuit performance and electrical fires.

When selecting the correct wire, one must also take into account voltage drop – that is, the difference in potential (voltage) between where your load draws energy and where it connects to its source. Voltage drop becomes especially crucial when running a wire over long distances like from 100-amp sub panel 200 feet away.

Copper Wire

Copper wire is widely used in residential, office building, and factory applications. Additionally, it plays an integral role in telecommunications networks and electric power distribution.

Copper wiring offers superior conductivity, corrosion resistance, and solderability. Plus it boasts high tensile strength and flexibility – making it the ideal solution for many electrical applications.

Copper wire, despite its inherent durability, must be insulated to protect it from damage and fire. Depending on the application, there are various types of insulations to choose from.

Furthermore, you have several choices of wire connectors to connect your wires. Some connectors feature a bare wire terminal which serves as grounding point; others have colored terminals which help identify which wire type is connected.

When selecting the correct wire for your electrical service, consulting a professional electrician is highly recommended. They will know how to size and install your wire in accordance with local building codes.

For instance, if your electrical code requires a 100 amp sub panel that’s 200 feet from your main panel, then you must choose a wire size that provides enough current for the circuit. This is done by calculating how much voltage drop occurs as you distance the wire from its source.

The National Electrical Code (NEC) stipulates that the voltage drop must not exceed 3% to prevent issues with system voltage. You can calculate the appropriate wire size for your sub panel using online calculators and tables.

In addition to choosing the wire size, you must also take into account how much voltage drops as it travels from one location to another. This is essential because it could compromise the safety of both your family and property.

For a 100 amp sub panel that’s 200 feet from your main panel, #1 AWG copper or 2/0 aluminum-clad wire are recommended due to their minimal voltage drop and ability to handle up to 100 amps without issue.

Aluminum Wire

If you’re planning to upgrade your electrical system and install a 100 amp sub panel that’s 200 feet away, you may be wondering which wire size is ideal. Generally speaking, longer distances require larger gauge wires in order to minimize voltage drop and ensure optimal performance; additionally, you must increase the initial amps by 20% for every 100 feet sent away from your sub panel.

This chart will guide you in determining the appropriate wire size for your application, whether it’s for a new sub panel or an existing one. First, determine what your current load is and whether any appliances that can run at higher current such as washer and dryer sets or multiple small appliances need to be considered.

Once you know how much power will be sent from your sub panel to each appliance, you can determine the appropriate size aluminum wire for each circuit.

For instance, if your current load is 120 amps, use an aluminum wire with at least 150-amp rating. Alternatively, you could experiment with smaller gauge wire to see how well it performs.

You should also take into account your climate when selecting a conductor for your circuits. The temperature in which you live has an immense effect on how well a wire can perform in these temperatures, so ensure it can withstand them.

Thankfully, there’s an ampacity chart for aluminum wires that details how many amps a specific aluminum wire can handle at various temperatures. The table includes ampacities at three different temperatures (60 degC, 75 degC and 90 degC) so you can quickly identify which wire best meets your requirements.

In addition to ampacities, this chart also displays a maximum allowable amp on each wire. This helps determine how much power your system is capable of handling before voltage drops occur.

In conclusion, using the correct wire size for your project and confirming that it complies with all standards set by the National Electrical Code (NEC) are paramount to avoiding potential issues that could cause serious injuries or even fires.


Installing an electrical service requires using the correct wire size. Doing so helps avoid electrical shorts, electrocution and fires. Furthermore, select appropriate conduit tubing for your installation as these safeguard your wiring from damage.

Conduit can be constructed out of various materials, such as flexible plastic or metal. They’re frequently used to transport wiring in industrial and commercial settings, as well as residential houses.

When selecting a conduit material, its performance and pressure capacity will be key factors. Depending on your specific needs, you may wish to explore using another type of conduit than what was originally intended.

Conduit tubing comes in several varieties, including steel and aluminum. Both materials are strong and can withstand considerable pressure.

Measure the diameter and length of a conduit to accurately determine its capacity for running wires through it.

When selecting a conduit, another factor to consider is its fill area. This will tell you how many wires it can accommodate; you can find this information by reading the NEC book or using a pipe fill chart that will assist in determining which size conduit works best for your project.

When numerous wires converge in a small conduit, heat can build up and cause overheating and damage the wiring.

Typically, opt for a conduit with a diameter of 1.5 inches or larger. This will enable you to pull the wires through it easily and without hassle.

State Electric Supply Co has the electrical wiring solutions you need. From copper and aluminum cables to stainless steel conduit tubing in all sizes, we have everything from cable trays and struts to other cable protection products. State Electric Supply Co is your go-to for all electrical wiring requirements!

If you’re unsure which type of conduit to purchase for your project, feel free to reach out to our team of experts for guidance. They are more than happy to help identify the ideal solution tailored specifically for your requirements.

Wire Connectors

When selecting wire size for a 100 amp sub panel that is 200 feet away, there are several factors to take into account. Most importantly, voltage drop–which refers to how much voltage will be lost as distance between two points increases–should be taken into account.

Neglecting this issue can have serious repercussions for both your appliances and home’s safety. Therefore, select a wire that can withstand the current you plan to use it with.

Wires come in a range of materials, such as copper and aluminum. Each type is sized differently and has its own amperage rating that is determined by the National Electrical Code (NEC).

Certain connectors are designed for specific wire gauges, such as #2 and #4 AWG. Generally speaking, the larger the wire gauge is, the higher its amperage rating; smaller gauges cannot carry as much power over them.

Connectors specific to a type of wire can usually be found at your local hardware store. These include terminal blocks, barrier strips and printed circuit board mounted screw terminals.

These types of connectors are user-friendly and typically come in a range of sizes and terminal quantities. Some work with both stranded and solid wires, while others can only accommodate copper or aluminum conductors.

Another type of connector is a twist-type wire nut, designed to create an intricate twisting connection between two exposed ends of wires. These nuts have a roughly conical shape with ridges on one side for easy gripping, plus they come equipped with springs that apply tension as you twist them together.

Wire nuts come in various sizes and colors to match the wires you will be connecting them to. The wrong size nut won’t provide enough force for a secure connection, potentially leading to an unsafe situation – loose wires can start fires! Always consult the packaging of any wire nut to find the appropriate size for how many wires you will be connecting.

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