Fire Resistant Tight Buffered Distribution Fiber Optic Cable – LSZH, Indoor/Outdoor, Riser & Duct – Telcordia GR409

Communication Cables
Description

Product Overview

This Fire Resistant Tight Buffered Distribution Fiber Optic Cable is used for interconnection of distribution boxes and end devices, where continued functionality is required during a fire situation. The cables are very suitable for various indoor and outdoor applications, including routing between buildings within ducts and inside building up to riser shafts.

Standards:

  • Basic design to Telcordia GR409‑CORE

  • TIA/EIA 568B.3

  • ICEA‑S‑83‑596

Physical & Thermal Properties:

  • Temperature range during operation (fixed state): -20°C to +60°C

  • Temperature range during installation (mobile state): 0°C to +50°C

  • Minimum bending radius:

    • Unarmoured: 10 × outer diameter

    • Armoured: 20 × outer diameter

Voltage Rating: 60V

Specifications

Property Details
Voltage Level Low Voltage (60V)
LSZH (Low Smoke Zero Halogen) ✓
Fire Resistance ✓ (continued functionality during fire)
Application Indoor/outdoor, ducts, riser shafts, between buildings

Construction

  1. Optical fibers: Singlemode and multimode tight fibers, with tight buffer coating.

  2. Fire Barrier: The tight buffered fibers are wrapped with fire blocking fiber glass yarns.

  3. Inner Sheath (optional): Thermoplastic LSZH compound.

  4. Ripcord (optional): Located under the outer sheath to facilitate jacket removal.

  5. Armouring (optional):

    • STA: Corrugated steel tape armour

    • SWB: Steel wire braid

  6. Outer Sheath: Thermoplastic LSZH compound.

Technical Parameters – Construction Data

Number of Fibers Nominal Overall Diameter (mm) Max Tensile Strength (N) Minimum Bending Radius (mm) Approx. Weight (kg/km)
2 7.6 250 76 55
4 7.8 250 78 67
6 8.6 400 86 77
8 8.8 400 88 81
12 9.3 400 93 90