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A #4 copper wire with an insulation factor of 75 or 90 degrees C is rated at 85 amps. A #2 aluminum wire with an insulation factor of 75 and 90 degrees C are rated at 90 and 95 amps respectively.

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βˆ™ 13y ago
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βˆ™ 5mo ago

A #2 aluminum wire would typically be used to replace a 4 gauge copper wire in a typical wiring application. However, it is important to consult with a qualified electrician or engineer to ensure the proper sizing for your specific application and to comply with local electrical codes.

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Q: What size aluminum wire would replace a four gage copper wire?
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