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The cable type is intended for direct burial or installation in ducts. The design incorporates 4 - 480 fibre. The fibre are grouped into ribbons consisting each of four fibre (maximum 96 fibres) or 8 fibre (maximum 480 fibre). The 4- or 8-fibre ribbon are stacked in a slotted core profile of polyethylene, which is extruded onto a dielectric fibre reinforced strength member (FRP). The cable type is longitudinal water-blocked through the use of swellable tape. It's double sheathed with halogen-free flame-retardant polymeric compound and armoured with corrugated steel tape. The cable type fulfils the fire propagation requirements stated in IEC 60332-3 cat.C.