Fire Resistant 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 to Telcordia GR-20 / RUS 7 CFR 1755.900 (REA PE-90)/ICEA S 87-640
FIRE PERFORMANCE
| Circuit Integrity |
IEC 60331-25 |
| 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Note: Asterisk * denotes superseded standard.
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 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 core assembly are wrapped with mica glass tape for added fire protection |
| 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.). UV resistance, hydrocarbon resistance, oil resistance, anti rodent and anti termite properties can be offered as option |
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
CONSTRUCTION PARAMETERS
| Cable Code |
Fiber Count |
Tube Diameter |
Nominal Overall Diameter |
Approx.Weight |
Tension load |
Crush |
| |
No. |
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
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)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
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)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
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)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 |
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 |
MECHANICAL PROPERTIES
| Maximum Compressive Load |
4000N for unarmoured cables 5000N 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 (150lb/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 |
