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The minimum wire size for a 30 amp load is 10 gauge copper or 8 gauge aluminum. Assuming a 120VAC circuit and to maintain a maximum 3 percent voltage drop from load to panel, upsizing to 4AWG wiring would be the best selection for this circuit.

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An accurate answer can not be given because the type of system has to be stated. Single phase or three phase and a voltage also has to be stated to be used in the calculation for sizing of the conductor.

A #8 copper conductor will limit the voltage drop to 3% or less when supplying 30 amps for 150 feet on a 120 volt system.

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9y ago
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12y ago

This question is best answered by knowing what equipment will be connected to the outlets, and what their expected current draw should be. It is also necessary to know what your voltage is.

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6y ago

You need to mention the voltage and the type of cable.

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9y ago

AWG #8 copper will work but I personally would use #6 for that long of a run.

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6y ago

You wil need to run AWG # 8 size wire.

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Q: What wire size is needed for 30 amp load for 200 feet?
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