... strength aluminum conductors, conforming to ASTM Specification B-399, are concentric-lay- stranded, similar in construction and appearance to ... 1350 grade aluminum conductors. Standard 6201 alloy conductors are similar to other alloy conductors commercially known as Ardival, ... 52.5% IACS, AC resistance at 60Hz •Current ratings are based on 75oC conductor temperature, 25oC ambient, 2ft/s wind, 96/ ...