Abstract :
Large economies in electricity-supply costs have been achieved in the past few years owing to the changeover from copper to aluminium as a material for cable conductors; the prospect of further sizable savings has prompted the investigation and development of polythene-insulated sodium conductors. As well as giving a possible capital saving of up to 50% over aluminium cables, the use of sodium cables can also lead to great economies because of the ease of handling and jointing.
