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This is a voltage drop question. A 300 MCM copper or a 500 MCM aluminium conductor will limit the voltage drop to 3% or less when supplying 200 amps for 450 feet on a 240 volt system. The cheapest of the two conductors would be the aluminium conductor. For direct burial is will have a ACWU 90 designation.

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8y ago
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13y ago

3/0 copper and 1/0 copper netural or 4/0 aluminum and 2/0 aluminum neutral.

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Q: What size wire would you use for a new 200 amp direct burial service?
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