规定绞合前、绞合中或绞合后形成或成形的同心架空导线的电气和机械特性，该导线由以下任何金属导线组合而成: a） 符合IEC 60889指定A1的硬质铝； b） 符合IEC 60889的硬质铝，指定绞合前成型的A1F线； c） 符合IEC 60104指定A2或A3的硬质铝合金； d） 符合IEC 60104的硬质铝合金，指定为A2F或A3F，绞合前成型； e） 常规强度钢，指定为S1A或S1B，其中A和B为镀锌等级，分别对应于1级和2级； f） 高强度钢，指定为S2A或S2B； g） 超高强度钢，命名为S3A； h） 铝包钢，指定为SA。

Specifies the electrical and mechanical characteristics of concentric lay, overhead conductors of wires formed or shaped before, during or after stranding, made of combinations of any of the following metal wires: a) hard aluminium as per IEC 60889 designated A1; b) hard aluminium as per IEC 60889 designated A1F wire shaped before stranding; c) hard aluminium alloy as per IEC 60104 designated A2 or A3; d) hard aluminium alloy as per IEC 60104 designated A2F or A3F shaped before stranding; e) regular strength steel, designated S1A or S1B, where A and B are zinc coating classes, corresponding respectively to classes 1 and 2; f) high strength steel, designated S2A or S2B; g) extra high strength steel, designated S3A; h) aluminium clad steel, designated SA.