If you follow the ampacity chart, you will need 3 AWG copper or 1 AWG aluminum for 100 amps. ![]() For a three-phase power source, 1/0 AWG Copper wire or, 3/0 AWG Aluminum wire can be used. Wire Circular mils 3 x 2 x x I x L / ( Allowable Voltage drop of source voltage ) Note: the Value of Specific resistance or resistivity of Conductor is used here for copper and aluminum is 11.2 and 17. We recommend you to get 2/0 AWG Copper wire or, 4/0 AWG Aluminum wire for single-phase. Calculating Wire/Cable Size formula for Three Phase Circuits. ![]() It is recommended to use them with 1.5-2.5 inches schedule 40 or 80 PVC conduit for underground service. If you want to pursue an expansion of 150 feet for your 100 amp service. The best one is 2 AWG for copper wire and 4 AWG for aluminum or copper-clad aluminum wire. The recommended wire size for a 100 amp sub-panel that’s 200 feet away is typically a 1-gauge copper wire. For 100 amps, if you use 4 AWG copper or 2 AWG aluminum wires, you can use 8 AWG copper or 6 AWG aluminum wires for grounding. The wire size for 100 amp service is 4 AWG copper wire or 2 AWG aluminum wire. Generally, the ground wire size for a 200 amp service ranges from 2 AWG to 8 AWG. ![]() Wire sizes are identified in American Wire Guage (AWG) and contain copper or aluminum wires in a wide array of thicknesses. As for the types of wire to look for, both copper and aluminum wires are available for 100-amp service. It is based on the wire size you use for the hot and neutral connections. Trending Questions What is the complete symbol of an element that has 78 electrons and 117 neutrons? What was happening in history during Gregor Mendel life span? What does Michael Faraday and Nikola Tesla have in common? Will Santa Maria volcano erupt again? What is a system unit? What are the levels of organization of biological systems from siplest to msot complex? What are the threat of alkanes to the environment? Do ocean currents move warm air from the equator toward the poles? Group of nerve cells? How do Christians in Kenya show respect for places of worship? What is happening to an ecosystem going through succession? How might solar powered buildings and cars reduce the amount of carbon dioxide that is added to the atmosphere? Why do people throw plastic on the floor? How many atoms are in 2. For larger homes with a 200 amp breaker box or higher that need more voltage, you can add a 100 amp subpanel.
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