4/23/2024 0 Comments 100 amp sub panel wire sizeFor 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. Knowing which size to pick is important, so you can use the right one for your equipment that requires electricity.
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