Aluminium ( Al )
Aluminium is the second most
widely used non-ferrous metal in cable industry after Copper. Aluminium wire is used
insulated and un-insulated. Aluminium wire is less conductive than
Copper. Resistivity of Aluminium wire is %65 more then copper wire.
Cross section area 16,50mm2 Aluminium wire is needed where 10mm2
copper wire is used. Still, Aluminium has weight and cost
advantage over Copper. Aluminium wiring is used in public lighting
because of this reason. Aluminium wire is mostly used in overhead power
distribution with steel wire combined. Typical over-head distribution
cable layout is steel wire in the middle and 3-4 layers of Aluminuim wire
stranded over steel core. Aluminium wire is also used as armouring wire
for single core power cables. Another area of cable industry is power cables
up to 0,6/1kV. Here, Aluminium is chosen because of cost efficiency and
light weight. Aluminium wire is also commmonly used as braiding material
in coaxial cables. Aluminium wire is used in cable industry in
Flat: Rarely used. For special applications where creeping is not an issue and light weight is required.
Round: The most
common form of Aluminium wire used in cable industry. It can be used as solid
single wire or different strand compositions.
Sector Shape : Used mostly in power cable production. Purpose of sector shape is to get better proportioned final structure and roundness. By using sector shaped Aluminium wire; isolation, jacket thickness and final diameter of finished cable is reduced.