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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; 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Note: Asterisk * denotes superseded standard.

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 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.)

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

Construction

Unarmoured type

Fire resistant Central Loose Tube Fiber Optic cables

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-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

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