In the Nitrotel GYTSD cable, SM or MM fibres are positioned in the loose tubes, which are made of high modulus plastic materials, while the loose tubes are filled with tube filling compound and strand together around dielectric “FRP” central strength member, into a compact and circular cable core. The water-blocking dry materials are distributed into interstices of the cable core, and the corrugated steel tape is longitudinally applied around the cable core before a HDPE sheath is extruded over.
