Aluminum bus bars are often used as electrical conductors in power distribution systems, where heat can easily be dissipated. Because of the low value of the metal, it can be the best economic option for the application.
Ac current capacity for Aluminum bar is 1 A/mm2 , & for Copper is 1.7 A /mm2 ➢ Assumed that the bars are mounted in still but Unconfined open air.