A flexible electrical power cable is described. The cable comprises a flexible metallic conductor and a plurality of alternately wrapped insulating layers comprising (1) at least two spirally wound layers of a tape made from mica paper and from a sheet of fibers which are resistant to temperatures up to at least 300 DEG C, the tape being impregnated with an adhesive silicon resin and (2) a layer of temperature-resistant plastic film or sheeting which is stable to at least 300 DEG C.
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