You will sometimes have to use 1 AWG copper and 2/0 AWG aluminum wires. Professionals say the precise wire gauge should be 3 AWG copper or 1 AWG aluminum wire. The NEC allows you to use the 4 AWG for 100 amps based on the understanding that the derating factors should be considered before confirming the wire size.Ĥ AWG is ideal if the distance is shorter than 50 feet. This discrepancy between the suggested wire size and the wire ampacity can be resolved by considering several factors like the wire material, distance, ambient temperature, wire ampacity, and voltage drop. I was confused, too, until I learned that NEC provides only the minimum wire gauge for different feeders. Isn’t it confusing because it is also the same wire for 70 amps?Īt the same time, when you see the Wire Ampacity Chart, you will see that a 4 AWG copper has 85A ampacity at 157☏, and a 2 AWG aluminum has 90A ampacity. The wire size for 100 amp service is 4 AWG copper wire or 2 AWG aluminum wire. Now he has upgraded to 200 amps like mine. He could run 1-2 electrical appliances efficiently. One of my friends used to have 100 amps to run an entire house. Knowing the correct wire size for 100 amp serviceīefore I share the ground wire size for 100 amp service, let’s talk about 100 amp service and its ideal wire size.ġ00 amp service is a considerable service that can run an entire house with a few electrical devices.īut it is not enough to run modern electrical, power-hungry appliances. Can I use a 200 amp breaker box with a 100 amp service?.What is the wire size for a 100-amp sub panel?.Grounding solutions for 100 amp service: Installation tips.Prioritizing electrical safety: Importance of proper ground wire sizing for 100 amps service.Choosing the correct ground wire for 100 amps: Key considerations.Demystifying 100 amp service ground wire size: A comprehensive guide.Knowing the correct wire size for 100 amp service.
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