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Fire Resistant Optic Fiber Cable

Fire resistant Multi Loose Tube Fiber Optic cables


The Fire resistant multi loose tube non metallic Fiber Optic cables are designed for outside plant, which is prone to electrical interference. They are mainly installed inside buildings, tunnels,subways or closed areas in general, specially designed to guarantee the signal transmission even in case of fire. The cable can also be used for direct burial for armoured version


Basic design to Telcordia GR-20 / RUS 7 CFR 1755.900 (REA PE-90) / ICEA S 87-640


Circuit Integrity IEC 60331-25; BS 6387 CWZ; DIN VDE 0472-814(FE180); CEI 20-36/2-1; SS229-1; NBN C 30-004 (cat. F3); NF C32-070-2.3(CR1)
System circuit integrity DIN 4102-12, E30 depending on lay system
Flame Retardance (Single Vertical Wire Test) EN 60332-1-2; IEC 60332-1-2; BS EN 60332-1-2; VDE 0482-332-1 ; NBN C 30-004 (cat. F1); NF C32-070-2.1(C2); CEI 20-35/1-2; EN 50265-2-1*; DIN VDE 0482-265-2-1*
Reduced Fire Propagation (Vertically-mounted bundled wires & cable test) EN 60332-3-24 (cat. C); IEC 60332-3-24; BS EN 60332-3-24; VDE 0482-332-3; NBN C 30-004 (cat. F2); NF C32-070-2.2(C1); CEI 20-22/3-4; EN 50266-2-4*; DIN VDE 0482-266-2-4
Halogen Free IEC 60754-1; EN 50267-2-1; DIN VDE 0482-267-2-1; CEI 20-37/2-1 ; BS 6425-1*
No Corrosive Gas Emission IEC 60754-2; EN 50267-2-2; DIN VDE 0482-267-2-2; CEI 20-37/2-2 ; BS 6425-2*
Minimum Smoke Emission IEC 61034-1&2; EN 61034 -1&2; DIN VDE 0482-1034-1&2; CEI 20-37/3-1&2; EN 50268-1&2*; BS 7622-1&2*
No Toxic gases NES 02-713; NF C 20-454

Note: Asterisk * denotes superseded standard.


Fibers: Singlemode and multimode fibers, with loose tube technology.
Structure: The cable consists of 5 to 36 fibers containing tubes or fillers stranded in up to 3 layers around a central strength member and bound under a LSZH sheath. Each tube contains 4 -12 fibers, which is filled with water blocking gel.
Central Strength Member: 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.
Fire Barrier: The jelly filled tubes containing the fibers are individually wound with fire blocking mica glass tape and are cabled around a central strength member
Water Blocking: The jelly filled tube is waterblocked by using swellable tape and thread.
Reinforcement: Either aramid yarn or fiber glass is wound around the tube to provide physical protection and tensile strength, with added fire protection.
Inner Sheath (optional): The cable can be jacketed with either PE or Thermoplastic LSZH inner sheath. PE is the preferred option in outdoor environment for water protection purpose.
Armouring(optional): For diect burial, either galvanized steel wire braid, corrugated steel tape armour or galvanized steel wire armour is applied over an inner polyethylene or LSZH sheath. For steel tape armour, the 0.15mm thick steel tape is coated with a copolymer and applied with an overlap. For steel wire braid or armour, single layer of galvanized steel wire braid or armour is applied.
Moisture Barrier Tape (optional): An aluminum moisture tape can be incorporated under the sheath for water blocking and shielding purpose.
Ripcord (optional): An optional ripcord can be located under the jacket to facilitate jacket removal.
Outer Sheath: Thermoplastic LSZH compound type LTS3 as per BS 7655-6.1(Thermosetting LSZH compound type SW2-SW4 as per BS 7655-2.6 can be offered.)


Temperature range during operation (fixed state): -20°C - +60°C
Temperature range during installation (mobile state): 0°C - +50°C
Minimum Installation Bending Radius: 20 times the outer diameter
Minimum operation Bending Radius: 10 times the outer diameter for unarmoured cables
20 times the outer diameter for armoured cables


Unarmoured type

Fire resistant Central Loose Tube Fiber Optic cables


Cable Code Fiber Count Tube Diameter Nominal Overall Diameter Approx. Weight Tension load Crush
  (n°) mm mm kg/km N N/100mm
MLA-B-C×D-F-H-J-FR 72 2.5 15.0 230 4000 3000
MLA-B-C×D-F-H-J-FR 96 2.5 16.5 250 4000 3000
MLA-B-C×D-F-H-J-FR 144 2.5 20.5 280 4000 3000

Steel Wire Braid

Cable Code Fiber Count Tube Diameter Nominal Overall Diameter Approx. Weight Tension load Crush
  (n°) mm mm kg/km N N/100mm
MLA-B-C×D-F-2Y(SWB)H-J-FR 72 2.5 15.0 280 3000 3500
MLA-B-C×D-F-2Y(SWB)H-J-FR 96 2.5 17.5 310 3000 3500
MLA-B-C×D-F-2Y(SWB)H-J-FR 144 2.5 21.5 350 3500 3500

Corrugated Steel Tape Armour

Cable Code Fiber Count Tube Diameter Nominal Overall Diameter Approx. Weight Tension load Crush
  (n°) mm mm kg/km N N/100mm
MLA-B-C×D-F-2Y(STA)H-J-FR 72 2.5 16.5 290 3000 7500
MLA-B-C×D-F-2Y(STA)H-J-FR 96 2.5 18.5 350 3000 7500
MLA-B-C×D-F-2Y(STA)H-J-FR 144 2.5 22.5 450 3500 7500

Steel Wire armour

Cable Code Fiber Count Tube Diameter Nominal Overall Diameter Approx. Weight Tension load Crush
  (n°) mm mm kg/km N N/100mm
MLA-B-C×D-F-2Y(SWA)H-J-FR 72 2.0 15.0 360 3500 5000
MLA-B-C×D-F-2Y(SWA)H-J-FR 96 2.0 16.5 390 4000 5000
MLA-B-C×D-F-2Y(SWA)H-J-FR 144 2.0 18.5 430 4500 5000

mechanical PROPERTIES

Maximum Compressive Load: 4000N for unarmoured cables 6000N for armoured cables
Repeated Impact: 4.4 N.m (J)
Twist (Torsion): 180×10 times, 125×OD
Cyclic Flexing: 25 cycles for armoured cables 100 cycles for unarmoured cables
Crush Resistance: 220N/cm(125lb/in)

Fiber Compliance

Temperature Cycling IEC60794-1-2-F2
Tensile Strength IEC60794-1-2-E1A
Crush IEC60794-1-2-E3
Impact IEC60794-1-2-E4
Repeated Bending IEC60794-1-2-E6
Torsion IEC60794-1-2-E7
Kink IEC60794-1-2-E10
Cable Bend IEC60794-1-2-E11
Cool Bend IEC60794-1-2-E11