Fire Resistant Multi Loose Tube Fiber Optic Cable, Fire Resistant Fiber Optic Cable

OVERVIEW

SPECIFICATIONS

CONSTRUCTION

PARAMETER

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Application

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.

Standards:

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

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

Specifications

Working Temperature 70℃

Fire Resistance

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

parameter

Unarmoured type

Steel Wire Braid

Corrugated Steel Tape Armour

Steel Wire armour

Mechanical PROPERTIES

Fiber Compliance

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

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

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

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

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)

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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