A #6 aluminium conductor with an insulation factor of 90 degrees C is rated for 55 amps.
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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.
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Today the only use of aluminum wire is in service entrances and underground feeds where the larger sizes are needed. By using aluminum the overall project wire costs are kept to a minimum even with the bigger size needed over copper. Wiring branch circuit in aluminum has not been vogue for many years now.
AWG # 6 copper or AWG # 4 aluminum
For a 100A subpanel, a minimum of 1.5-inch Schedule 80 PVC conduit or 1.25-inch rigid metal conduit is recommended. As for the aluminum wire, for a 100A feeder, you would typically use 1/0 AWG aluminum wire for a 3-wire setup or 2/0 AWG aluminum wire for a 4-wire setup. Always consult local electrical codes and a licensed electrician for precise specifications for your installation.
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.
The recommended conduit size for 4/0 aluminum wire is 2 inches.
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.
The recommended wire size for a 100 amp aluminum service is typically 2 AWG (American Wire Gauge).
The recommended wire size for a 200 amp service using aluminum wire is typically 2/0 AWG (American Wire Gauge).
The recommended aluminum wire size for a 200 amp service is typically 2/0 AWG.
The recommended wire size for a 100 amp aluminum electrical circuit is typically 2 AWG (American Wire Gauge).
The recommended gauge size for a 100 amp aluminum wire installation is typically 2 AWG (American Wire Gauge).
The recommended wire size for a 200 amp aluminum electrical circuit is typically 2/0 AWG (American Wire Gauge).
Don't use aluminum wire inside the house.
For a 100 amp service, it is recommended to use aluminum wire that is at least 2 AWG in size.
The recommended wire size for aluminum conductors to handle a 100 amp electrical load is typically 2 AWG (American Wire Gauge).