Flame Retardant Multi Loose Tube Fiber Optic Cables

APPLICATION

The multi loose tube non metallic 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.

STANDARDS

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

FIRE PERFORMANCE

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 60332-3-22 (cat. A); IEC 60332-3-22; BS EN 60332-3-22; 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

Note: Asterisk ** denotes that the standard compliance is optional, depending on the oxygen index of the PVC compound and the cable design.

CABLE CONSTRUCTION

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 PVC 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
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 PVC inner sheath. PE is the preferred option in outdoor environment for water protection purpose
Moisture Barrier Tape (optional) An aluminum moisture tape can be incorporated under the sheath for water blocking and shielding 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 PVC 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
Ripcord (optional) An optional ripcord can be located under the jacket to facilitate jacket removal.Outer Sheath
Outer Sheath Thermoplastic PVC compound. UV resistance, hydrocarbon resistance, oil resistance, anti rodent and anti termite properties can be offered as option. Compliance to fire performance standard (IEC 60332-1, IEC 60332-3, UL 1581, UL 1666 etc) depends on the oxygen index of the PVC compound and the overall cable design. LSPVC can also be provided upon request

FIBER COLOR CODE

Fiber colour code 1 Red 7 Brown
2 Green 8 Violet
3 Blue 9 Turquoise
4 Yellow 10 Black
5 White 11 Orange
6 Grey 12 Pink

CONSTRUCTION

Unarmoured Type

images/Flame Retardant Central Loose Tube Fiber Optic Cables-unarmoured type.jpg images/Fiber optic cables-unarmoured type.jpg

CONSTRUCTION PARAMETERS

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-Y-J 72 2.5 15.0 230 4000 3000
MLA-B-C×D-F-Y-J 96 2.5 16.5 250 4000 3000
MLA-B-C×D-F-Y-J 144 2.5 20.5 280 4000 3000

Steel Wire Braid

images/Flame Retardant Central Loose Tube Fiber Optic Cables-Steel wire braid.jpg images/Fiber Optic Cables-Steel wire braid.jpg

CONSTRUCTION PARAMETERS

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)Y-J 72 2.5 15.0 280 3000 3500
MLA-B-C×D-F-2Y(SWB)Y-J 96 2.5 17.5 310 3000 3500
MLA-B-C×D-F-2Y(SWB)Y-J 144 2.5 21.5 350 3500 3500

Corrugated Steel Tape Armour

images/Flame retardant Multi Loose tube fiber cables-Corrugated Steel Tape Armour.jpg images/Multi Loose tube fiber cables-STA.jpg

CONSTRUCTION PARAMETERS

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)Y-J 72 2.5 16.5 290 3000 7500
MLA-B-C×D-F-2Y(STA)Y-J 96 2.5 18.5 350 3000 7500
MLA-B-C×D-F-2Y(STA)Y-J 144 2.5 22.5 450 3500 7500

Steel Wire Armour

images/Flame Retardant Central Loose Tube Fiber Optic Cables-Steel wire armour.jpg images/FR Fiber cables-Steel wire armour.jpg

CONSTRUCTION PARAMETERS

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)Y-J 72 2.0 15.0 360 3500 5000
MLA-B-C×D-F-2Y(SWA)Y-J 96 2.0 16.5 390 4000 5000
MLA-B-C×D-F-2Y(SWA)Y-J 144 2.0 18.5 430 4500 5000

PHYSICAL AND THERMAL PROPERTIES

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

20 times the outer diameter for armoured cables

Minimum Installation Bending Radius 20 times the outer diameter

MERCHANICAL 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
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