11/29/2023 0 Comments 100 amp wire size thhn![]() We cut all of these wires and cables by the foot with no extra charge, allowing our customers to choose the exact length they need for the installation. Based on the length of the run and your environment they will provide important feedback. Wire And Cable Your Way always recommends consulting with a local electrician before you make a purchase. For safe wiring practices, consult the National Electrical Code and your local building inspector. Our most popular aluminum wire for 100 amps service would be our #2 AWG XHHW-2 Aluminum Building Wire & our #1 AWG XHHW-2 Aluminum Building WireĬlick here to view pricing and specs on our XHHW-2 Aluminum Building Wire We also offer single conductor XHHW-2 Aluminum Building Wire. We have a wide selection of underground aluminum secondary distribution cable which is multi-conductor & used for direct burial.Ĭlick here to view pricing and specs on our entire Aluminum Underground Secondary Distribution Cable category > If you are looking for Aluminum, we have a great variety of Aluminum Building Wire to choose from as well. ![]() Martin was running over 100' of wire for the connect.Ĭlick here to view pricing and specs on #2 THHN Copper Building Wire >ĭepending of the length of the run, many customers also decide on #3 AWG THHN Copper Building Wire to run 100 amp outdoor service.Ĭlick here to view pricing and specs on #3 THHN Copper Building Wire > Our customer, Marvin for example, who sent in the above photo of his wire installation, used #2 AWG THHN Copper Building Wire for 100 amp outdoor service to his shed. If so, Wire And Cable Your Way has a few excellent options. If you are unsure, seek the help of a licensed electrician.Are you looking for wire & cable to run 100 amp outdoor service to your shed? Always make sure to shut off the power higher up the line when working on a service panel. ![]() ConclusionĬhoosing the appropriate wire size for your 100 amp breaker is not as complicated as it seems. However, if you choose too small a gauge, the circuits will go bad and as a result, the risk of electrical fire will go up. Using the larger gauge will require you to spend more. Opting to err on the side of caution is the best idea here. When choosing between two gauge sizes for a 100 amp main breaker, you should know that bigger is always better. The heat-resistant and corrosion-resistant properties make it the most preferred wire material. It also uses less insulation and has a lower wire gauge compared to aluminum. Multi-Conductor 3 gauge THHN Copper Wire Rated for direct burial - no need for conduit Click here for. 3.) 2/3C with ground Tray Cable (THHN-PVC) for 100 Amp Sub-Panel. Single Conductor 2 gauge THHN Copper Wire Needs to be buried in a conduit Click here for pricing on 2 gauge THHN wire. ![]() On the other hand, copper has better conductivity and can handle higher electrical loads. 2.) 2 THHN/THWN-2 Wire for 100 amp sub-panel. Another drawback is the antioxidant coating required to resist corrosion, unlike the copper-clad aluminum. However, due to lower conductivity compared to copper, aluminum wiring needs a larger-sized wire. Aluminum wires are widely used because they are inexpensive, light, and flexible. Once you have figured out the wire size required, the next problem is choosing the wire material. It applies regardless of whether it is a breaker or subpanel.’ Copper vs Aluminum If you consider the material, then the recommended gauge is 1 made of aluminum and 3 made of copper for a 100 amp branch circuit. The #3 AWG wire has 100A ampacity but it is supposed to be used in circuits requiring 80 amps or less. Therefore, #1 AWG has 130A ampacity which conducts at most 104 amps. It is a safety measure that tells you about the actual ampacity. The 80% rule of NEC says that the maximum loading for any branch circuit is 80% of the rating of the circuit for ampacity of wire for any load. However, the most appropriate one here is the #1 AWG wire with a 130 amp median capacity. From the wire gauge chart, we see that a #3 AWG wire seems to be the most plausible wire size with 100-ampacity.
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