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U-DQ(ZN)H(SR)H · Mica barrier · Corrugated steel armor
Fire Resistant Fiber Optic Cable
This fire resistant fiber optic cable combines a gel-filled loose tube, mica fire barrier, glass-yarn reinforcement, inner LSOH sheath, corrugated steel tape and outer LSOH jacket. It is intended for projects requiring a documented fire-performance specification.
Specify the required circuit-integrity test, duration and installation arrangement when requesting a quotation. A low-smoke jacket and a flame-retardancy test do not by themselves establish a circuit-integrity duration.
2–24Published fiber counts
MicaFire barrier
Steel tapeMechanical armor
LSOHInner and outer jackets
Fire Resistant Cable Construction
| Layer / option | Published specification |
|---|---|
| Optical fibers | Singlemode and multimode configurations; specify the exact grade |
| Central tube | PBT loose tube with thixotropic gel |
| Fire barrier | Mica tape |
| Tensile reinforcement | Glass yarn |
| Inner jacket | LSOH |
| Armor | Corrugated steel tape |
| Outer jacket | UV-resistant LSOH |
The linked PDF identifies this construction as U-DQ(ZN)H(SR)H. Fiber options listed include G.652.D, G.655, G.657.A1/A2 and OM1–OM4, subject to the selected configuration. State the required fiber grade, attenuation specification and operating wavelengths in the quotation request.
Published Fiber Counts and Cable Dimensions
| Fiber count | Tube diameter | Cable diameter | Approximate mass |
|---|---|---|---|
| 2 | 2.8 mm | 11.7 mm | 180 kg/km |
| 4 / 6 / 8 | 2.8 mm | 11.7 mm | 185 kg/km |
| 12 | 3.4 mm | 12.2 mm | 200 kg/km |
| 16 / 20 / 24 | 4.2 mm | 13.0 mm | 220 kg/km |
Confirm the fiber grade and ordered construction with the final datasheet and drum schedule. The dimensions and mass above are the published configurations; do not apply them to a different cable structure.
Installation and Environmental Limits
| Parameter | Published value |
|---|---|
| Minimum bend radius, operation | 20 × cable diameter |
| Minimum bend radius, fixed condition | 10 × cable diameter |
| Crush test | 2500 N / 100 mm for 15 minutes |
| Impact test | 10 N·m; 3 impacts; R = 300 mm |
| Storage and transport temperature | 0 to +70 °C |
| Installation temperature | −30 to +60 °C |
| Operating temperature | −20 to +70 °C |
| Drum lengths | 2 or 4 km ±5%, as specified |
The PDF lists tensile limits using cable-weight-dependent formulas, with minimum values of 3000 N during installation and 1000 N during operation. Obtain the confirmed tensile limit for the ordered construction before planning a pull. Follow the bend limit appropriate to the installation stage.
Fire Performance and Required Test Documents
| Performance aspect | Standard referenced in PDF | Ordering confirmation |
|---|---|---|
| Circuit integrity under fire | IEC 60331-25 | Request the test report, achieved duration and applicable cable construction |
| Flame propagation | IEC 60332-1 | Confirm the ordered construction and required test criteria |
| Smoke emission | IEC 61034 / EN 50268 | Request the applicable report where required |
| Halogen / corrosive gas assessment | IEC 60754 / EN 50267 | Confirm the applicable part and measured results |
Confirm the required fire-survival duration with a product-specific test report. Request the achieved duration, test conditions and exact tested construction in the supporting report. For regulated installations, request the current declarations and supporting reports required by the project.
Specify Fire Resistant Fiber Cable for Your Project
- Required fiber count, singlemode/multimode grade and optical limits.
- Circuit-integrity test standard, required duration and report acceptance criteria.
- Route, support system, environmental exposure and installation method.
- Mechanical requirements, pulling plan, drum lengths and connector/splice arrangement.
- Smoke, halogen, flame-propagation and applicable declaration requirements.
Provide the project fire specification and request written confirmation of the exact supplied cable construction. Armor and UV resistance alone do not establish suitability for every burial or wet-route installation.