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That distance you are going to have to install a sub-panel and run AWG # 4 wire and even then you will have a voltage drop of 7.45 volts giving you 232.55 volts at the sub-panel which is acceptable.

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10y ago
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10y ago

At 100 feet you are safe with AWG # 10 copper.

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9y ago

A #6 copper conductor will limit the voltage drop to 3% or less when supplying 30 amps for 460 feet on a 240 volt system.

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13y ago

10 AWG

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Q: What size wire for 30 amp breaker 240 volts 100 feet?
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Yes as long as you use the correct size breaker.


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