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 60332-3-24 (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 |
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.
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.
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 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 colour 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
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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
/Multi-Loose-Tube2.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/Multi-Loose-Tube3.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
/Multi-Loose-Tube4.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 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
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 |
