What gauge wire 120 volt 30 amp 800 ft?

For a 120-volt, 30-amp circuit running 800 feet, you would typically need to use a larger gauge wire to compensate for voltage drop. Generally, a 10 AWG copper wire is recommended for this application, but depending on the specific installation conditions and local codes, you might consider using 8 AWG to further reduce voltage drop. Always consult local electrical codes and a qualified electrician to ensure compliance and safety.