1.2 Cable Description 1 Single Jacket, Non Armor, Self-support Figure-8 Single or Multi mode color coded fibers, filled color coded loose tubes, PE filler if required, SZ-stranded around
Trang 1TECHNICAL SPECIFICATION
LOOSE TUBE SINGLE JACKET, NON ARMOR SELF-SUPPORT
FIGURE-8 DRY CORE CABLE
Trang 21 SCOPE
1.1 Application
This specification covers the general requirements for fiber optic telecommunication cables used for aerial application
1.2 Cable Description
1) Single Jacket, Non Armor, Self-support Figure-8
Single or Multi mode color coded fibers, filled color coded loose tubes, PE filler (if required), SZ-stranded around the dielectric central strength member, water blocking tape, dielectric strength member, suspension wire and outer PE jacket
2 OPTICAL FIBER
The optical, geometrical and mechanical performance of the optical fiber shall be in accordance with Table 1 and 2 below
Table 1 The Optical, Geometrical and Mechanical Performance of the Multi Mode Fiber
SPECIFICATION ITEMS UNITS
50 Multi Mode 62.5 Multi Mode
Attenuation dB/km 3.5 at 850nm
1.0 at 1300nm
3.5 at 850nm 1.0 at 1300nm Bandwidth MHz.km 400 at 850nm
600 at 1300nm
200 at 850nm
400 at 1300nm Numerical Aperture - 0.20 0.015 0.275 0.015 Core Diameter 50 3.0 62.5 3.0 Core Non-circularity % 6.0 6.0
Cladding Diameter 125 2.0 125 2.0 Cladding Non-circularity % 2.0 2.0
Core/Cladding Concentricity Error 3.0 3.0
Coating Diameter 245 15 245 15 Proof Test kpsi 100 100
*Note) Superior performance available upon request
Trang 3Table 2 The Optical, Geometrical and Mechanical Performance of the Single Mode Fiber
ITEMS UNITS SPECIFICATION
Attenuation dB/km 0.40 at 1310nm
0.25 at 1550nm Chromatic Dispersion ps/nm.km 3.2 at 1285nm ~ 1330nm
18 at 1550nm Zero Dispersion Wavelength nm 1300 ~ 1324
Zero Dispersion Slope ps/nm2.km 0.093
Cut-off Wavelength
( cc, 22m of a cabled fiber) nm 1270
Mode Field Diameter 9.3 10%
Mode Field Concentricity 0.8
Cladding Diameter 125 1.0
Cladding Non-circularity % 1.0
Coating Diameter 245 15
Proof Test kpsi 100
*Note) Superior performance available upon request
3 CABLE CONSTRUCTION
The construction of the cable shall be in accordance with Table 3 below
Table 3 Construction of the Cable
ITEMS DESCRIPTION
Number of Fibers 2 ~ 144
Type of Fiber Single Mode or 62.5 Multi Mode or 50 Multi Mode Loose Buffer Tube PBT (Polybutylene Terephthalate)
Filling Compound
in Loose Buffer Tube Thixotropic Jelly Compound
Water Blocking Material Water Swellable Tape or Yarn (around the CSM) Dielectric CSM FRP (Fiberglass Reinforced Plastic)
with PE coating (if necessary) Core Wrapping Tape Water Swellable Tape
(To prevent the ingress of water) Dielectric Strength Member
Glass yarns (To provide the required tensile strength together with the central strength member)
Trang 4Table 3 Construction of the Cable.(continued)
Suspension Wire Galvanized 7 Stranded Steel Wires
Diameter of each wire : Nom 2.0mm Outer Jacket Material : Black MDPE or HDPE
Thickness : Nom 2.0mm
4 FIBER AND LOOSE BUFFER TUBE IDENTIFICATION
The color code of the loose buffer tubes and the individual fibers within each loose buffer tube shall be in accordance with Table 4 below
Table 4 The Color Code of the Individual Fibers and Loose Tubes
No of Fibers/
Loose Buffer Tubes Color
No of Fibers/
Loose Buffer Tubes Color
2 Orange 8 Black
3 Green 9 Yellow
4 Brown 10 Violet
5 Grey 11 Pink
6 White 12 Aqua
5 PHYSICAL / MECHANICAL / ENVIRONMENTAL PERFORMANCE
The mechanical and environmental performance of the cable shall be in accordance with Table 5 below Unless otherwise specified, attenuation is measured before and after each test in this section and all attenuation measurements required in this section shall be performed at 1550nm for single mode fiber (SM) and at 1300nm for multi mode fiber (MM)
Table 5 The Mechanical and Environmental Performance of the Cable
ITEMS TEST METHOD AND
ACCEPTANCE CRITERIA
Compressive Loading
Resistance Test
# Test method: TIA/EIA-455-41A - Applied load: 110 N/cm - Duration of loading: 10 minutes
# Acceptance Criteria - Attenuation Increment: 0.10 dB (SM) 0.20 dB (MM)
Trang 5Table 5 The Mechanical and Environmental Performance of the Cable(continued)
ITEMS TEST METHOD AND
ACCEPTANCE CRITERIA
Repeated Impact Test
# Test method: TIA/EIA-455-25B - Height of impact: 150mm - Drop hammer mass: 2.0kg - No of impact cycles: 20 cycles
# Acceptance Criteria - Attenuation Increment: 0.10 dB (SM) 0.20 dB (MM)
- No jacket cracking and fiber breakage
Cyclic Flexing Test
# Test method: TIA/EIA-455-104A - Sheave diameter: 20D (D = cable diameter) - No of flexing cycles: 25 cycles
- Flexing speed: 30 cycles/minute
# Acceptance Criteria - Attenuation Increment: 0.10 dB (SM) 0.20 dB (MM)
- No jacket cracking and fiber breakage
Cable Twist Test
# Test method: TIA/EIA-455-85A - Cable length twisted: 2m (Suspension wire and web shall be removed prior to testing the cable)
- No of twist cycles: 10 cycles - Twist angle: 180
# Acceptance Criteria - Attenuation Increment: 0.10 dB (SM) 0.20 dB (MM)
- No jacket cracking and fiber breakage
Temperature Cycling Test
# Test method: TIA/EIA-455-3A - Temperature cycling schedule : 23 -25 65 -25 65 23 - Soak time at each temperature: 8hours
# Acceptance Criteria - Attenuation increment: 0.15 dB/km (SM) 0.20 dB/km (MM)
Water Penetration Test
# Test method: TIA/EIA-455-82B - Length of specimen: 3m (Suspension wire and web shall be removed prior to testing the cable)
- Height of pressure head: 1m - Test time: 24 hours
# Acceptance Criteria - No leakage through the open cable end
Trang 66 REPRESENTATIVE SPAN LENGTHS
Representative span lengths for installation are in accordance with Table 6 below
Table 6 Representative Span Lengths
NESC Loading District Fiber count Max Span length (m)
* Span length based on 1% installation sag in heavy storm area as defined in Rule 251 of the National Electric Safety code (NESC) Other span and sag condition is also available if required by customer
7 PACKING AND MARKING
7.1 Cable Marking
The jacket shall be marked at intervals of one meter with following information
1) Cable type and fiber counts
2) Name of the manufacturer
3) Year of manufacture
4) Length marking
7.2 Cable Packing
7.2.1 Standard length of cable shall be 2km Other cable length is also available if required by customer
7.2.2 Each length of the cable shall be wound on a separate wooden reel
7.2.3 Both ends of the cable shall be sealed with a suitable plastic cap to prevent the entry of moisture during shipping, handling and storage
7.2.4 Wood-fiber board or circumference battens shall be laid on cable between flanges and fixed by steel bands
7.2.5 The cable ends shall be securely fastened to the reel to prevent the cable from becoming loose in transit or during placing operations
Trang 77.3 Cable Reel
7.3.1 Details given below shall be distinctly marked on a weather proof materials on both outer sides of the reel flange:
(1) Length of cable in meters
(2) Cable type and fiber counts
(3) Gross weight in kilograms
(4) Reel number
(5) Name of the manufacturer
(6) Year of manufacture
(7) Arrow showing the direction the drum shall be rolled
7.3.2 The cable shall be wound on the reel designed to prevent damage s during shipment and installation
7.3.3 The arbor hole on each flange shall be lined with a metal plate
== End of Specification ==