What size aluminum wire needed for 60 amp at 240 volt for 330 feet underground?

A 1/0 AWG aluminium conductor will limit the voltage drop to 3% or less when supplying 60 amps for 330 feet on a 240 volt system. The cable will be rated as ACWU 90. ACWU 90 cables are primarily intended for exposed and concealed wiring in dry or wet locations and where exposed to the weather. For use in ventilated, non-ventilated, and ladder type cable trays in wet and dry locations; direct earth burial; service entrance above or below ground.