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A 3/0 copper conductor with an insulation rating of 75 or 90 degrees C is rated at 200 and 210 amps respectively.

A 3/0 copper conductor will limit the voltage drop to 2% or less when supplying 200 amps for 80 feet on a 240 volt system.

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Q: What size electrical wire do I need to run from a meter main to a 200 amp panel 80 feet away?
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