Specification LGST 2004-201 FOR Optical Fiber Cable Loose Tube / Jelly Filled Core Single Jacket / Non-Armored [ Figure-8 Self-supporting Aerial Cable ] 1. SCOPE 1.1 Application This specification covers the general requirements for fiber optic telecommunication cables used for self-supported aerial applications. 1.2 Cable Description Color coded fibers, filled color coded loose tubes, PE filler, SZ-stranding around the dielectric central strength member, flooding jelly compound, core wrapping tape, ripcords, messenger wires 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 ≤ 3.0 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 μm 50±3.0 62.5±3.0 Core Non-circularity % ≤ 6.0 ≤ 6.0 Cladding Diameter μm 125±2.0 125±2.0 Cladding Non-circularity % ≤ 2.0 ≤ 2.0 Core/Cladding Concentricity Error μm ≤ 3.0 ≤ 3.0 Coating Diameter μm 245±15 245±15 Proof Test kPsi ≥ 100 ≥ 100 * Other performance value available upon request. Table 2. The Optical and Geometrical Performance of Single Mode Fiber (ITU-T G652) ITEMS UNITS SPECIFICATION Attenuation dB/km ≤ 0.36 at 1310nm ≤ 0.22 at 1550nm Attenuation vs. Wavelength dB/km ≤ 0.05 at 1285nm & 1330nm (from the 1310nm value) ≤ 0.05 at 1525nm & 1575nm (from the 1550nm value) Point Discontinuity dB ≤ 0.10 at 1310nm & 1550nm Attenuation at Water peak dB/km ≤ 1.5 at 1383nm Chromatic Dispersion ps/nm.km ≤ 3.5 at 1285 nm ~ 1330 nm ≤ 18 at 1550 nm Cable Cut-off Wavelength (λcc) nm ≤ 1260 Zero Dispersion Slope ps/nm 2 .km ≤ 0.093 Polarization Mode Dispersion ps/√km ≤ 0.5 Attenuation vs. Bending 75mm x 100turns dB ≤ 0.05 at 1550nm ≤ 0.10 at 1550nm Mode Field Diameter μm 9.3 ± 0.5 at 1310nm 10.5 ± 1.0 at 1550nm Mode field Concentricity error μm ≤ 0.8 Cladding Diameter μm 125 ± 1.0 Cladding Non-circularity % ≤ 1 Coating Diameter μm 245 ± 10 Proof Test GN/m 2 ≥ 0.7 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 Max. 72 No. of Fibers per Tube 6 or 12 Loose Buffer Tube PBT (Polybutylene Terephthalate) Filling Compound in Loose Buffer Tube Thixotropic Jelly Compound Filler Polyethylene Rod (if necessary to make good core configuration) Central Strength Member FRP Flooding Compound between Loose Tubes Polybutene Jelly Compound Core Wrapping Tape Plastic Tape (To provide heat barrier and good core configuration) Rip Cord Two ripcords (To provide easy cable entry, approx. 180° separation) Material 7-strands of Galvanized Steel Wire Messenger Wire Diameter Nom. 2.0mm (each strand) Material Black MDPE or HDPE Outer Jacket Thickness Nom. 1.8mm 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. Color No. Color 1 Blue 7 Red 2 Orange 8 Black 3 Green 9 Yellow 4 Brown 10 Violet 5 Slate 11 Rose 6 White 12 Aqua 5. PHYSICAL / MECHANICAL / ENVIRONMENTAL PERFORMANCE AND TESTS 5.1 Temperature Range For the cables covered by this specification, the following temperature ranges apply: -. Operation : -25 °C to +70°C -. Installation : -10 °C to +60°C -. Storage/Shipping : -40 °C to +70°C 5.2 Typical Span, Sag and Tension NESC loading condition, recommended span, sag and tension for Figure-8 type aerial cable is described in Table 5 and 6 below. Table 5. Recommended Span, Sag and Tension Every Day Operation NESC Loading (Light) Fiber Counts Span (m) Normal Sag (m ) Tension (kg) Max. Sag (m) Max. Tension (kg) 6 ~ 36 50 0.5 197 0.80 345 48 ~ 72 50 0.5 200 0.81 350 Table 6. Environmental Conditions in NESC Loading Districts (NESC, Rule 250B) Items Unit Light Medium Heavy Installation 20 20 20 Every Day Operation 15 15 15 Temperature Max. Operation °C -1 -10 -20 Ice Thickness mm - 6.5 12.5 Wind Speed km/hr 123.2 82.1 82.1 Wind Pressure kg/m 2 43.9 19.4 19.4 5.3 Mechanical and Environmental Performance of the Cable The mechanical and environmental performance of the cable shall be in accordance with Table 7 below. Unless otherwise specified, 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) and monitored before and after of each test items in Table 7. The messenger wire part may be removed from the cable sample for convenience in testing, but for tensile strength test, it shall not be removed from the sample. Table 7. 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) after completion of the test -. No jacket cracking and fiber breakage Repeated Impact Test # Test method: TIA/EIA-455-25C -. Height of impact: 150mm -. Drop Mass: 3kg -. No. of impact cycles: 2 cycles # Acceptance Criteria -. Attenuation Increment: ≤ 0.10 dB (SM) ≤ 0.20 dB (MM) after completion of the test -. 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) after completion of the test -. No jacket cracking and fiber breakage Cable Twist Test # Test method: TIA/EIA-455-85A -. Cable length twisted: 2m -. No. of twist cycles: 10 cycles -. Twist angle: ±180° # Acceptance Criteria -. Attenuation Increment: ≤ 0.10 dB (SM) ≤ 0.20 dB (MM) after completion of the test -. No jacket cracking and fiber breakage Temperature Cycling Test # Test method: TIA/EIA-455-3A -. Temperature cycling schedule : 23°C→ -25°C→ 70°C→ -25°C→ 70°C→ 23°C -. Soak time at each temperature: 8hours # Acceptance Criteria -. Attenuation increment: ≤ 0.15 dB/km (SM) ≤ 0.20 dB/km (MM) Table 7. The Mechanical and Environmental Performance of the Cable (Continued) ITEMS TEST METHOD AND ACCEPTANCE CRITERIA Water Penetration Test # Test method: TIA/EIA-455-82B -. Length of specimen: 3m -. Height of pressure head: 1m -. Test time: 24 hours # Acceptance Criteria -. No leakage through the open cable end 6. PACKING AND MARKING 6.1 Cable Marking The sheath shall be marked at intervals of one meter with following information. 1) Purchaser name 2) Cable type and fiber counts (ex, "SJNA-F8 SM24C") 3) Name of the manufacturer 4) Year of manufacture 5) Length marking Ex.1) For single mode 24-fiber cable 0000m (Purchaser name) SJNA-F8 SM 24C LG Cable 2004 0001m … ※ Other markings are also available 6.2 Cable Re-marking The re-marking shall be marked, preferably with yellow characters, on the outer cable jacket. Any cable that contains two sets of cable markings shall be marked to indicate the color of the marking to be used. 6.3 Cable Packing 6.3.1 Standard length of cable shall be 4km. Other cable length is also available if required by customer. 6.3.2 Short lengths: up to 10% of the deliveries may be shorter than 4,000 meters but never shorter than 2,000 meters. 6.3.3 Each length of the cable shall be wound on a separate wooden reel. 6.3.4 Both ends of the cable shall be sealed with suitable plastic caps to prevent the entry of moisture during shipping, handling and storage. 6.3.5 The cable ends shall be securely fastened to the reel to prevent the cable from becoming loose in transit or during placing operations. 6.3.6 The inner end of the cable is housed into a slot on the side of the reel without extra cable length for testing. 6.3.7 Circumference battens or wood-fiber board shall be secured with steel bands to protect the cable during normal handling and shipping. 6.4 Cable Reel 6.4.1 Details given below shall be distinctly marked with a weather proof material on both outer sides of the reel flange: (1) Purchaser’s name (2) Cable type and number of fibers (3) Length of cable in meters (4) Gross weight in kilogram (5) Reel number (6) Year of manufacture (7) Name of the manufacturer (8) Arrow showing the direction the drum shall be rolled Other shipping mark is also available if requested by customer. 6.4.2 The cable shall be shipped on reels designed to prevent damage to the cable during shipment and installation. 6.4.3 The arbor holes provided in the reels shall be at least 65 mm and at most 120 mm in diameter. < Cross-sectional Drawing of Cable > 1. 36-Fiber Cable y Messenger Wires y Optical Fibers y Filling Compound y Loose Buffer Tubes y Central Strength Member y Flooding Compound y Core Wrapping Tape y Ripcords y Outer PE Jacket 2. Diameter, Weight and Minimum Bending Radius Min. Bending Radius(mm) No. of Fibers Fiber No in a Tube Nominal Cable Diameter (mm x mm) Approx. Cable Weight (kg/km) Under Load No Load 6 ~ 36 6 10.5 x 22.0 315 210 105 48 ~ 72 12 11.1 x 22.5 320 222 111 *) Actual values for cable weight and diameter may deviate from the calculated values given in the table above. == End of Specification == . Specification LGST 200 4-2 01 FOR Optical Fiber Cable Loose Tube / Jelly Filled Core Single Jacket / Non-Armored [ Figure- 8 Self-supporting Aerial Cable ] 1. SCOPE. fiber breakage Cable Twist Test # Test method: TIA/EIA-45 5 -8 5A -. Cable length twisted: 2m -. No. of twist cycles: 10 cycles -. Twist angle: ± 180 ° # Acceptance