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For Service Entrance Cable 600 kcmill (Thousands of circular mils).

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2 AWG Aluminum for 100 Amp Service.

Q: What size aluminum wire for 1200 amp service?

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250 MCM aluminum minimum

A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.

A 3/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 150 amps for 150 feet on a 240 volt system. This size will allow the conductor to be loaded to 120 amps. 150 x 80% = 120 Conductors are only allowed to be loaded to 80% or their rated capacity. If you need the full 150 amps then you would need to use a wire with a rating of 190 amps. 190 x 80% = 152 amps A 4/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 190 amps for 150 feet on a 240 volt system.

A #3 copper wire with an insulation factor of 75 and 90 degrees C is rated at 100 and 105 amps respectively.

A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.

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250 MCM aluminum minimum

A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.

Copper wire gauge sizes are not equivalent to aluminum wire gauge sizes. The gauge sizes for copper and aluminum wires are different due to their differing electrical conductivity properties. It is not possible to directly convert a copper wire size to an equivalent aluminum wire size.

For a 1200 amp service, you should use a copper ground wire of at least 3/0 AWG or an aluminum wire of at least 250 kcmil to meet the National Electrical Code requirements. It's always recommended to consult with a licensed electrician to ensure the proper sizing and installation of the ground wire.

This is a voltage drop question. To receive an answer to this question the voltage of the service must be stated.

A 1600 amp service typically requires 500 kcmil copper wire or 750 kcmil aluminum wire. It's important to consult with a qualified electrician to determine the exact size and type of wire needed for your specific installation to ensure safety and compliance with local electrical codes.

Wire size is rated by Amperes of current. You did not mention the wire size of the aluminum wire, so there is no way to answer your question. The voltage rating is more a rating of how good the insulation around the wire is.

Don't use aluminum wire inside the house.

aluminum wire violates code for any use anywhere in US. If this is true, why would aluminum wire be sold? I know it is used for service entrance.

For a 100 amp service, a common feeder wire size would be 2 AWG (American Wire Gauge) copper or 1/0 AWG aluminum. These sizes are appropriate for handling the current capacity needed for a 100 amp electrical service. It is important to consult with a licensed electrician or local building code requirements to ensure the proper wire size for your specific installation.

A 3/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 150 amps for 150 feet on a 240 volt system. This size will allow the conductor to be loaded to 120 amps. 150 x 80% = 120 Conductors are only allowed to be loaded to 80% or their rated capacity. If you need the full 150 amps then you would need to use a wire with a rating of 190 amps. 190 x 80% = 152 amps A 4/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 190 amps for 150 feet on a 240 volt system.

A #3 copper wire with an insulation factor of 75 and 90 degrees C is rated at 100 and 105 amps respectively.