Type Tests. Cables shall be subjected to all type tests specified in IEC 60502-1; when type tests have been successfully performed on a type of cable covered by this standard with a specific conductor cross-sectional area and rated voltage, type test certificate will be accepted as for cables of the same type with other conductor cross-sectional areas and/or rated voltages, provided the following three conditions are all satisfied: a) The same materials, i.e. insulation and semi-conducting screens, and manufacturing Process is used. b) The conductor cross-sectional area is not larger than that of the tested cable. c) The rated voltage is not higher than that of the tested cable. d) Approval shall be independent of the conductor material. - Type tests required by this standard are as follows: a) Insulation resistance measurement at ambient temperature. b) insulation resistance measurement at maximum conductor temperature in normal operation c) Voltage test for 4 h. d) Cables of rated voltage 1,8/3 (3,6) kV shall also be subjected to an impulse test on a separate sample of completed cable, 10 m to 15 m in length .
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