6.1 Introduction Cables for power distribution are mainly characterised by the material of the conductor, voltage grade, type of insulation, type of sheathing, type of armouring etc. Cables are designed to safely carry the current it is required to carry under normal operating conditions as well as abnormal conditions. To carry a current safely means (1) the temperature rise and voltage drop should be within the prescribed limits and (2) the insulation of the cable should withstand the normal operating voltage as well as higher voltages that may arise under abnormal conditions. In some situations, the cable may encounter with severe mechanical stress or highly contaminated environment in addition to the electrical stress. Hence it is necessary to ensure by means of pre-test inspections read more

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