What wire 240 volts 20 amps 300 feet?

Answer 1

# 4 gauge THHN or THHW is rated for 95 amps and would normally be the correct wire size. However, at 300 ft. from the source, you definetely will have a substantial voltage drop. Therefore, you need to up the conductor size to # 3 gauge.

Answer 2

For a 240-volt 20-amp circuit running 300 feet, you should use at least a 10-gauge copper wire to prevent voltage drop over the distance. It is advisable to consult local electrical codes and consider factors like insulation type and installation method to ensure proper sizing and safety of the wiring.

Answer 3

12 AWG is the normal requirement for 20 A. At 300 ft. there is about 1/2 ohm resistance, so at full load of 20 A you would have a drop of 10 volts which shouldn't cause a problem under most conditions.

Answer 4

A 300 MCM copper conductor with an insulation factor of 90 degrees C is rated at 320 amps.

Answer 5

12/2 in Canada

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A #8 copper conductor will limit the voltage drop to 3% or less when supplying 20 amps for 120 feet on a 120 volt system.