Question: A single core cable of conductor diameter 2 cm is to be used on a 6 6 kV , 3 - phase system Two intersheaths

A single core cable of conductor diameter 2 cm is to be used on a 66 kV ,3-phase system Two intersheaths of diameter 3.1 cm and 4.2 cm are introduced between the core and lead sheath. Maximum dielectric stress is 38.8kVcm and that is same for all layers.
Calculate the diameter of the lead sheath and the voltages on the intersheaths.

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