But since we’re being specific here, you’ll need a 1-gauge copper wire for your 100 amp sub panel. This cable is suitable for wet and dry applications, as well as for underground service and direct burial.Have you ever wondered what wire size for a 100 amp sub panel that’s 200 feet away? It’s an important question as just using any random wire size could lead to some serious issues.Ĭhoosing the correct size of wires for sub-panels is all about safety. Most of these have the same characteristics as their aluminum counterparts, but one cable that is specifically aluminum is 2-2-2-4 Dyke Quadruplex Aluminum Conductor Underground Direct Burial 600V URD.Ģ-2-2-4 Dyke Quadruplex Aluminum Conductor Underground Direct Burial 600V URD is an all-around great budget-friendly choice for 100 amp service. USE-2 (approved for underground service).2-2-2-4 Dyke Quadruplex Aluminum Conductor Underground Direct Burial 600V URD.Types of Aluminum Wire For 100-amp Service PanelsĪluminum wire for 100 AMP service is just as good as copper wire as long as you choose the correct size.Ĭommon types of aluminum wire used in 100 Amp service are: UF-B cable is used for underground service and as a direct burial cable.Type MC cable has a protective armor and can be used without conduit.Make sure to choose the cable with a suitable size of a ground wire. Copper SER is a popular choice for panels and subpanels.USE-2 RHH RHW-2 can be used for underground service entrance applications.THHN/THWN-2 and XHHW-XHHW-2 are used in conduit.The last one is suitable for underground service. Types of Copper Wire For 100-amp Service PanelsĬommon types of copper wire used in 100 Amp service are THHN/THWN-2, USE-2 RHH RHW-2, XHHW, type MC cable, copper SER cable, and UF-B cable. For commercial applications, flame-retardant, plenum or riser-rated, and low-smoke zero halogen cables should be used. Both are perfectly fine to use in these panels. Wires Used in 100 Amp service are different depending on whether it is copper or aluminum wire. In general, a 100 AMP service is very common, and you can find a 100 amps sub panel everywhere. 100 Amp service may also be used to feed different subpanels and circuit breaker panels in residential, commercial, and industrial buildings. Other basic applications of a 100 amp service panel are detached garages, workshops, agricultural facilities, and temporary power at the construction sites. 100 Amp service is not good for houses over 3,000 square feet with central air conditioning or electric heat. In these houses, 150 amp and 200 amp services are more common. While 100-amp service is enough for such homes, it is not common for larger houses with the combination of electric and gas appliances and high-power demand. It is quite standard for older homes that have a limited number of appliances. Is 100 amp service enough for your home? The answer depends on the size of your home and your appliances.Ī 100-Amp service panel is typical for mid-size private houses and apartments with several 240-volt appliances and basic air conditioning. You would typically use 8 AWG copper grounding wire or 6 AWG aluminum grounding wire. The ground wire size for 100 Amp service is different. If the run of the wire is significantly long, such as over 100 feet, you should use a larger size out of the sizes described above to accommodate for voltage drop. When choosing 100 amp service wire size, remember that a 100 amp circuit at 240V can proceed up to 24,000W of electricity. These sizes are also used for direct burial. Typical sizes of wires for 100 Amp Service are 4 AWG or 2 AWG for copper wiring and 2 AWG, 1 AWG, or 1/0 AWG for aluminum or copper-clad wiring. Options include THHN, XHHW, UF-B, USE, and SER. One of the most common questions wire and cable buyers ask is: Which wire gauge to use for 100 amp service, and which type of cable to choose? The truth is that you can use many types of copper and aluminum wire in a 100-amp service.
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