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 I.S. EN 60889 designated A1; b) hard aluminium as per I.S. EN 60889 designated A1F wire shaped before stranding; c) hard aluminium alloy as per I.S. EN 60104 designated A2 or A3; d) hard aluminium alloy as per I.S. EN 60104 designated A2F or A3F.