Electrical applications of aluminium primarily exploit the very good electrical conductivity (low resistivity) of the bulk metal, and its low cost and density. Good mechanical strength, corrosion resistance and thermal conductivity are also often important.

This case study illustrates the successful application of aluminium to overhead electrical cables, illustrating the combinations of properties and processability which lead to success.

Learning Outcomes for this Section

After completing this section, you should be able to:

• describe the competing factors in the design of electrical overhead cables
• explain the reasons for using aluminium, including the key material properties and trade-offs in their design;