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Production » Outdoor cables » Fiber-optic 8-shaped self-supporting cables » OKT/ST cable

OKT/ST cable

Fiber-optic 8-shaped cable OKT for suspension on overhead power lines, urban lighting pillars, between buildings.


OKT cable is designed for suspension on overhead power lines, urban lighting pillars, between buildings.

  1. Central strength member – fiberglass rod
  2. Optical fiber
  3. SZ stranded loose tubes filled with hydrophobic gel
  4. Protective jacket
  5. FRP rod
  6. * longitudinal watertightness of the cable is provided by a hydrophobic gel


Suspension strand is made of stranded galvanized steel wires or FRP rod. It is put longitudinally to the cable core. Loose-tube cable. Central strength member is made of fiber reinforced plastic rod (FRP). Polymer tubes and plastic fillers are SZ-stranded around central strength member. Optical fibers are placed inside polymer tubes. Interstice inside and between polymer tubes is filled with hydrophobic filler. Cable core is wrapped by yarns. PET-tape is imposed on the cable core. Cable core and suspension strand are formed at once longitudinally with high density polyethylene jackets. Cable core jacket and suspension strand jacket are connected along.

On customer’s request cable design can have following options:

  1. Production of «dry» construction (water blocking yarns instead of hydrophobic filler).
  2. Change of the standard color of polymer modules and fibers.
  3. Number of fibers up to 288.


Number of fibers2-4850-9698-144
Number of polymer tubes 6 6 6
Number of optical fibers in a tube up to 8 up to 16 up to 24
Cable size (suspension strand-steel wire), mm 14,5x8,4 15,8x9,8 17,2x11,2
Cable size (suspension strand-FRP rod), mm 15,6x8,5 16,9x9,8 19,3x12,2
Total mass of cable (suspension strand-steel wire), kg/km 101 136 186
Total mass of cable (suspension strand-FRP rod), kg/km 107 141 191


Temperature range of operation, С° -60… +70
Temperature range of installation, С° -10… +50
Transport, storage, С° -60… +70
Minimal bending radius not less than 20 diameters
Lifetime 25 years
Guarantee exploitation 2 years after putting in operation, not more than 2,5 years from shipping date
Tensile strength from 3,0 kN to 12,0 kN
Crush strength not less than 3,0 kN/100 mm

Documentation is on request

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