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The question is one of voltage loss. The goal is to have enough ampacity in the selected conductors to run the maximum load with only 3 percent voltage drop, caused by the resistance inherent in the wires.
Plug your numbers into a voltage drop calculator online and see what pops out.
At 120 volts you would get 3.1 percent drop using 3/0 wire.
At 240 volts you could drop down three sizes to #1 AWG for 3.1 percent at max load, or 1/0 size for 2.5 percent drop at max load.
Assuming copper wire at normal conditions of temperature.
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∙ 11y ago
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What wire size is needed for 30amp load for 34 feet on 12 volts DC?
8 gauge will be sufficient with less than a half volt drop
What size wire is needed for a 180' run?
To answer this question the voltage and load amperage is needed.
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AWG # 10 wire on 30 amp circuit.
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8 gauge will be sufficient with less than a half volt drop
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To answer this question the voltage and load amperage is needed.
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