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A #3 copper wire with an insulation rating of 75 or 90 degrees C is rated at 100 and 110 amps consecutively.

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Q: What size wire for 100 amp?
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What is the recommended copper wire size for a 100 amp service?

The recommended copper wire size for a 100 amp service is typically 3 AWG (American Wire Gauge).


What size wire should be used for a 100 amp service in copper?

For a 100 amp service in copper, a wire size of 3/0 AWG should be used.


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For a 100 amp service, it is recommended to use aluminum wire that is at least 2 AWG in size.


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