![]() It is inversely proportional to the diameter. You could also come across gauges like 1/0, 2/0, and 3/0. ![]() 6 and 4 are just some of the numbers you’ll encounter. ![]() Instead of referring to its actual thickness, people use its gauge. If you have ever been to the electrical section of a hardware store, you will notice it comes in several options. This determines how much electrical current it can safely carry. The gauge is the diameter of the product. Scroll down further if you need the wire size for 200, 300, 400, or 600 amps. We have the right wire size for you if you need something more substantial, like 100, 125, or 150 amps. Full wire size chart for 70, 80, 100, 125, 150, 200, 300, 400, & 600 ampĬheck the chart below to find the right wire size for 70 or 80 amps. The right wire size for 600 amp service is at least 1500 kcmil assuming a temperature of 167☏ for the conductor. Take a look at the NEC electrical cable chart below. In contrast, a copper 600 kcmil can handle that amount of power. The right 400 amp wire size requires an aluminum wire size of 1000 kcmil. $2,425.49 Buy on Amazon 300 amp wire sizeįor 300 amp service, you will want copper wire size 500 kcmil to handle the load. For a circuit breaker with this rating, you can use 4- gauge copper at an ambient temperature of 140☏. The requirement depends on whether aluminum or copper is used and the ambient temperature. That is, assuming there aren’t other factors impacting the performance. 70 amp wire sizeįor 70 amps, the right wire size is either a gauge 3 aluminum or a gauge 4 copper. Simply take a look at the chart further down the page. The 8- gauge nor the 10- gauge can be coupled with this breaker. You want to know if you can use these with the circuit breaker. Let’s say you have an 8- gauge and a 10-rated lying a round at home. That is assuming the right conditions, such as temperature. If you’re more cautious, a 4 AWG is great. Here are all the products we recommend based on NEC’s ampacity chart to ensure safety. We’ve got you covered if you want to buy a circuit breaker or a sub-panel. For 600 amp, you will need a 1500 kcmil- gauge wire size. For a 400 amp service, you will need a 600 kcmil-gauge copper wire size. For a 200 amp service, you will need a 250 kcmil-gauge copper wire size. For 150 amp, you will need a 1/0- size copper wire size. For an 80 amp, you need a 4- gauge copper wire size. For a 100 amp service, you will need a 1- gauge wire size.įor 125 amps, you will need a 1- gauge copper wire size. What electrical components do I need for a project? The rule of thumb that techs will usually go by is that for a 70 amp circuit breaker, 4-gauge copper wire is the right size to go with. If this is your first time reading about the topic, we cover some basic things to know about it. ↑ By Royal_Observatory_Edinburgh_East_Tower_2010.Knowing which size to pick is important, so you can use the right one for your equipment that requires electricity.Copper - A Metal for the Ages, Available: Environmental Risks and Challenges of Anthropogenic Metals Flows and Cycles. Table of Electrical Resistivity and Conductivity, Available: Abundance in Earth's Crust of the elements, Available: ↑ Made with information from the Royal Society of Chemistry, Available:.The uses of copper by percentage (estimated) are shown in the Figure below. Some properties of copper include: Atomic weight The most famous examples is mixing copper with tin to make bronze, or with zinc to form brass. Copper is too soft to be used alone for most applications but people discovered long ago that it can be mixed with other metals to form strong alloys. Although it is used predominantly in wiring, other uses for copper include plumbing, currency, and jewelry. Its conductivity is second only to silver, however copper is about 860 times more abundant on Earth than silver, so it is much cheaper. Ĭopper is used in large amounts in the electricity industry in the form of wire, due to its high electrical conductivity (see the table below). Known for its distinct color (visible in Figure 2) copper was one of the first metals ever manipulated by humans - with evidence suggesting its use for over 11 000 years. Ĭopper ( Cu) is the 29 th element on the periodic table, and is found fairly commonly on Earth, with approximately the same abundance as zinc and nickel. Native copper (not combined to any other element and found naturally), approx.
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