![]() There are many different factors that need to be taken into account when selecting the right wire for the job. The amount of electricity required determines the size of wire needed (see also: Electric Hot Water Heater: What Size Wire Do I Need?)to provide enough current flow.įor a 100 amp service, a thick gauge wire is necessary to ensure safety and efficiency. It is determined by the amount of electricity needed for the size and type of building or vehicle as well as what appliances are used inside. These are some frequently asked questions (FAQs) related to the wire size of 125 amps and how to use it in any electrical project properly.This article will provide an overview of the guidelines for selecting the right wire size for a 100 amp service, so read on to learn more! What Is Amp Service?ĪMP service is an electrical system that provides power to a building or motorhome. When dealing with 125 amp wire sizes, many questions about their size and usage may arise. Understanding the size of the wire is important when it comes to electrical wiring projects. Related reading: 80 Amp Wire Size: Breaker & Wiring Gauge Guide FAQs Ultimately, both types of wiring have advantages and a place in modern electrical work. When choosing between aluminum or copper wiring, it’s important to consider the purpose of the wiring and the environment in which it will be used.Ĭopper wires are typically more expensive than aluminum but are better suited for long runs or high-heat environments.Īluminum is often used as a cost-effective alternative when copper is not suitable. ![]() This makes aluminum wire a more cost-effective choice for 125 amp feeder wire, despite the thickness of the wire. The downside of copper wiring is that it is expensive, especially in larger wires that run long distances. Copper wire material is better for branch circuits to lighting, outlets, and household appliances. Therefore, a smaller wire can safely carry the maximum current from the main circuit breaker panel to the new sub-panel or appliance. On the other hand, copper wires are better at maintaining consistent electrical flow at higher temperatures and offer better conductivity than aluminum wires. Because of the lower heat resistance, aluminum wires can heat up faster than copper wires, so they must be thicker to carry the same voltage. The two main differences between aluminum and copper wires are their resistance to heat and voltage.Īluminum wires have lower heat resistance and can be used for high-voltage applications. Copper Aluminum Maximum Distance 2 AWG 1/0 AWG 100 feet 1 AWG 2/0 AWG 200 feet 1/0 AWG 3/0 AWG 250 feet 2/0 AWG 4/0 AWG 300 feet 3/0 AWG 300 kcmil 400 feet Parameters 230 Volt, Three-phase, 3% voltage drop, 75 degrees C Aluminum vs Copper Wires For long distances, you’ll need a thicker wire to counteract voltage drop and ensure the circuit works properly at the end of the line. If you’re running a 125 amp circuit for longer distances, such as between two buildings, it’s important to select the correct wire size. The wire will have two hot wires, one neutral wire, and one ground wire, regardless if you select 1-gauge copper or 2/0 aluminum. Double pole breakers are rated for 240 volts, providing greater protection against short circuits, arc faults, and overloads. ![]() When wiring a 125-amp system, select a 125-amp double pole circuit breaker for a main disconnect. No matter what type of 125 amp wire size you choose, consult a certified electrician for help with the installation and use the size specified by the NEC table for your circuit. It costs less money than 1-gauge copper, is lightweight, and has excellent flexibility making it cost-effective for longer distances. Copper is the best option and provides superior conductivity, meaning it can efficiently handle higher electrical current demands.Ģ/0 aluminum is another popular wire size for 125 amp sub panel. Both have their own advantages, depending on your individual needs.ġ-gauge copper is the most common type of wire used in residential and commercial circuits for up to 125 amps. When determining the 125 amp sub-panel wire size, there are two types of 125 amp wire sizes: 1-gauge copper and 2/0 aluminum. The 200 amp wire size you need will increase the longer the distance run to account for voltage drop. Note on Wire Sizes: A #2/0 AWG copper or #4/0 AWG aluminum wire size is also used for 200 amps. With their expertise, you can rest assured that your electrical system is up-to-code and safe! Please consult a licensed electrician for more detailed information on the 125 amp wire size and breaker. With the proper installation, you won’t have to worry about arcing or short circuits, which can be a major safety hazard. By following these guidelines, you’ll have peace of mind that your 125 amp wire size and breaker are up to code and can handle all of your electrical needs.
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