InDuct FiberGlass

All-dielectric outside plant (OSP) cable is typically deployed in ducts. It can also be lashed to a messenger wire for aerial installation and can be attached to bridges or the lining inside a tunnel. The NESC permits OSP cable to be run up to 50 feet inside a building. Using fiberglass yarn lowers cost and provides a degree of rodent protection.


Central strength member: FRP


Optical fiber


Dry loose tube


Water-swellable yarns


Fiberglass yarns





Up to 864 fibers

All-dielectric design

InDuct FiberGlass is an all-dielectric and UV-resistant design which can have up to 864 fibers. Its maximum rated design tension can reach up to 607 lb and crush is 126 lb/in.

The cable consists of a stranded core with a central strength member (FRP), dry loose tubes with optical fibers and PE fillers (where applicable). The stranded core is fixed by water-swellable yarns. Fiberglass yarns are laid over the stranded core.

Typical application:

— It can be pulled into underground ducts and sewer pipes

— It can be installed along bridges, tunnels and other structures

— It can be installed into indoor/outdoor cable conduits and trays

— It can also be lashed

This fiberglass cable has a reduced weight and size, and it’s easy to install. Moreover, all Incab InDuct cables may be produced as flame-retardant.

Maximum rated design tension (MRDT) 899 lb (4 kN)
Crush 126 lb/in (0.22 kN/cm)
Fiber count, up to 72 (6x12) 96 (8x12) 144 (12x12)
Cable diameter, in 0.472 0.543 0.677
Cable weight, lb/ft 0.066 0.084 0.131
Minimum bending radius, in 7.1 8.2 10.2
Operating temperature -40°F ... +158°F
Installation temperature -22°F ... +158°F
Transportation and storage temperature -58°F ... +158°F
Minimum bending radius 15 x cable diameter
Design life 25 years

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