Aluminum has the features of low cost and low weight. Current electrical grade aluminum (Al) conductors are actually an aluminum alloy. Aluminum conductors can be round or bar shaped. Both of these shapes are used in a large majority of transmission and distribution circuits as well as industrial plants. The primary reasons for using aluminum conductors are its lower cost and low weight to conductivity ratio.http://www.lyyrcable.com/bare-....conductor/all-alumin