The most economical construction and size of cable persistent with current carrying capacity and laying conditions has to be selected. A detailed study of 3 or 4 approximate sizes is made. Actual running costs are worked out taking into consideration |2R loss and interest, depreciation of the total cable cost. The size which gives minimum running costs is to be preferred.
| The most economical construction and size of cable persistent with current carrying capacity and laying conditions has to be sel |