AAC All Aluminum Conductor ASTM B 231
AAC is the abbreviation of All Aluminum Conductor, which is a bare wire without a sheath. AAC is made of pure aluminum or electrolytic aluminum, which has good electrical conductivity, corrosion resistance and lightness. AAC is widely used in transmission lines, distribution lines and overhead catenary, etc.
Application
This wire is suitable for use in spans on wood poles, transmission towers, and other structures where high tensile strength is not required. Applications range from extra high voltage (EHV) transmission lines to sub-service spans at distribution or utilization voltages on private premises.
AAC (all aluminum conductor) is the most economical bare overhead conductor due to its lighter weight. It offers easier handling during installation and use of simpler fittings. The wire is corrosion resistant due to its homogeneous construction.
Standard
-ASTM B 230 Aluminum 1350-H19, extra hard, round wire for electrical purposes.
-ASTM B 231 Concentric Lay Stranded Aluminum 1350 Conductors.
Construction
Concentric lay stranded Aluminium Conductor ( AAC) is made up of one or more strands of hard drawn 1350 aluminum alloy. These conductors are used in low, medium and high voltage overhead lines. AAC has seen extensive use in urban areas where spans are usually short but high conductivity us required. The excellent corrosion resistance of aluminium has made AAC a conductor of choice in coastal areas. Because of its relatively poor strength to weight ratio, AAC had limited use in transmission lines and rural distribution because of long spans utilized. All aluminium conductors are made up of one or more strands of aluminium wire dep.