... laying across rivers and valleys where special geographical teatures exist. 1. Specification: (1) all aluminium conductor (AAC) (2) all aluminimum alloy ... 2. Manufacturing standards: IEC83, IEC1089, 31, B232, BS215, DIN48204. 1). Standard: IEC61089, BS215 part2, ASTM B232, DIN48204, BS EN50182. 2 ... of stranding and metal conductivity of 61.2% IACS for EC (1350) and 8% IACS for steel. AC (60Hz) ...