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Fiber Optic Cables
Fig8 Self-supporting Cable
Application
This cable is ideal for in long distance and interoffice communication in strong current zone, as well as power
transmission system. The built in suspension stranded rope provides high tensile strength, enabling the cable
suited for large span installation, resulting in time and installation cost savings. The suspension wire, being an
integral part of the cable, is easily available for gripping, fastening and pulling. This cable is featured of its
lightness, low dispersion and high tensile strength.
Description
The cable consists of 5 to 36 fibers containing tubes or fi llers stranded in up to 3 layers around a central
strength member and bound under a PE jacket. Each jelly fi lled tube contains 4 -12 fi bers. Solid or stranded
steel wire coated with polyethylene is usually used as central strength member. Fiber glass reinforced plastics
(FRP) will be used as central strength member if non metallic construction is required. Either aramid yarn or fiber
glass is wound around the tube to provide physical protection and tensile strength. Water blocking materials are
fi lled in the interstice of the cable core, core wrapping layer/water blocking tape. The cable can be jacketed with
either PE, PVC or LSZH though PE is the preferred option for water protection purpose. For direct burial, steel
wire armour or corrugated steel tape armour is applied with an optional inner jacket of either PVC or PE. An
optional Aluminium moisture tape can be incorporated under the jacket for water blocking and shielding
purpose. Cable cores are connected with the suspension wires by PE sheath to form a fi gure “8” shape. An
optional ripcord is located under the jacket to facilitate jacket removal.
Construction
Physical Properties
| Fiber Count | Nominal Weight(kg/km) | Nominal Weight(lb/kft) | Nominal Outer Diameter(mm) | Nominal Outer Diameter(in) | Maximum Pulling Load | |
| Installation(N/Ib) | In Service(N/Ib) | |||||
| 2-24 | 389.0 | 261.07 | 12.6*25.1 | 0.50*0.99 | 2670/600 | 890/200 |
| 36-72 | 429.0 | 287.92 | 14.7*27.1 | 0.58*1.07 | 2670/600 | 890/200 |
| 96-144 | 571.0 | 383.22 | 20.2*32.6 | 0.80*1.29 | 2670/600 | 890/200 |
| 2-24 | 303.0 | 203.36 | 9.1*21.5 | 0.36*0.85 | 2670/600 | 890/200 |
| 36-72 | 332.0 | 222.82 | 11.1*23.5 | 0.44*0.93 | 2670/600 | 890/200 |
| 96-144 | 417.0 | 279.87 | 15.9*28.3 | 0.63*1.12 | 2670/600 | 890/200 |
Construction
Physical Properties
| Fiber Count | Nominal Weight(kg/km) | Nominal Weight(lb/kft) | Nominal Outer Diameter(mm) | Nominal Outer Diameter(in) | Maximum Pulling Load | |
| Installation(N/Ib) | In Service(N/Ib) | |||||
| 2-24 | 389.0 | 261.07 | 12.6*25.1 | 0.50*0.99 | 2670/600 | 890/200 |
| 36-72 | 429.0 | 287.92 | 14.7*27.1 | 0.58*1.07 | 2670/600 | 890/200 |
| 96-144 | 571.0 | 383.22 | 20.2*32.6 | 0.80*1.29 | 2670/600 | 890/200 |
Mechanical Properties
| Minimum Bending Radius: | Maximum Compressive Load: | 4000N for unarmored cables; | |
| Under installation: | 20×OD | 6000N for armoured cables | |
| During operation | 0×OD for unarmoured cables | Repeated Impact: | 4.4 N.m (J) |
| 20×OD for armoured cables | Twist (Torsion): | 180×10 times, 125×OD | |
| Temperature Range: | Cyclic Flexing: | 25 cycles for armoured cables. | |
| Operating Temperature Range: | -40℃(-40℉) to +70℃(+158℉) | 100 cycles for unarmoured cables. | |
| Storage Temperature Range: | -50℃(-58℉) to +70℃(+158℉) | Crush Resistance: | 220N/cm (125lb/in) |
Fiber Compliance
Temperature Cycling |
IEC60794-1-2-F2 |
Safety Compliance
| General Purpose Grade | Flammability Test: OFN (UL1581) |
| Riser Grade | Flammability Test: OFNR/FT4 (UL1666) |
| Plenum Grade | Flammability Test: OFNP/FT6 (UL 910) |
| FRPVC Grade | Flammability Test: IEC60332-1 |
| LSZH Grade | Halogen Content Test: IEC 60754-1 Acidity Test: IEC 60754; Smoke Emission Test: IEC61034-1/2 |
| LSFROH Grade | Halogen Content Test: IEC 60754-1 Acidity Test: IEC 60754; Smoke Emission Test: IEC61034-1/2 Flammability Test: IEC60332-1 & IEC 60332-3C/A |
| FR Grade | Fire Resistance Test : IEC 60331 / BS 6387 CWZ |
Standard Compliance
Telcordia GR-20 RUS 7 CFR 1755.900 (REA PE-90) ICEA S 87-640
Features
Suitable for self supporting aerial, duct and direct burial installation.
Tear away messenger simplifi es grounding.
Ripcord allows easy cable entry and jacket remova.
lCompatible with existing Fig 8 hardware.
Flexible buffer tube simplifi es routing and splicing.
Loose tube jelly fi lled for superior fi ber protection.
UV or moisture resistant for outdoor application.