InSky OPGW C Optical Ground Wire Central loose tube (C)

An excellent choice when low weight and a small diameter are more important than rated breaking strength (RBS) and short circuit current resistance. Often used to replace existing conventional 3/8 inch HS/EHS groundwire.


Optical fiber


Stainless steel tube filled with water-blocking gel


Stranded wires (aluminum-clad steel wires and/or aluminum alloy wires)


Stranded wires (aluminum-clad steel wires and/or aluminum alloy wires)

OPGW marking: unique and the only one in the industry to know the exact footage and identify the design type

Up to 96 fibers

Aluminum-clad steel wires are corrosion-resistant

Optical ground wire (OPGW) shields high-voltage conductors from lightning strikes

Aluminum alloy wires provide conductivity for fault current

InSky OPGW C (Optical Ground Wire Central Loose Tube) is a perfect choice if you are looking for a low weight and a small diameter cable for your fiber optic project or need to replace existing conventional 3/8 inch HS/EHS ground wire. OPGW C manufactured by Incab is a cost-effective solution. It can have up to 96 fibers and is highly corrosion-resistant. Stainless steel tube provides superior protection for the fibers. Small diameters (from 0.315 to 0.709 in) are mechanically and electrically efficient.

All Incab OPGW cables have a proven design life of 50 years. They are a wholesome 3-in-1 solution for the utilities and telecommunication industry being a ground wire that enables efficient power distribution grids, a telecom medium with high-speed optical fiber for data transmission and additionally for power line monitoring. Moreover, they don’t require additional costs when placing fiber optic communication lines on power lines.

Incab OPGW cables have been tested by the independent laboratory “Kinectrics” (Canada) according to IEEE 1222 standard.

Select the optimal OPGW design for your project using our Configurator ACES: Advanced Cable Engineering System.

Maximum rated design tension (MRDT) 3372...28101 lb (15...125 kN)
Crush 571 lb/in (1 kN/cm)
Rated breaking strength (RBS) (without SSLTs), lb 5620...47210
Fiber count, up to 96
Cable diameter, in 0.315...0.709
Cable weight, lb/ft 0.134...0.827
Elasticity modulus (final), ksi 10153...23206
Short circuit capacity (initial temp 77°F), kA²•s 5...300
Short circuit current for 1s, kA 2...20
Operating temperature -58°F ... +185°F
* -76°F ... +185°F upon request
Installation temperature -22°F ... +122°F
Transportation and storage temperature -58°F ... +185°F
Minimum bending radius 20 x cable diameter
Design life 50 years

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