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  • Single Mode Fiber Optic - Direct Burial - Loose Tube

    Application

    Single jacket loose tube cable with a dielectric central strength member, reinforced with glass yarns and polyethylene jacket, designed for outdoor applications, for direct installations in duct. The cable is supplied in UV resistant high density polyethylene (HDPE) duct.

    Construction 

    Up to 12 optical fibers are enclosed in a polybutylene terephthalate (PBT) tubes.

    Up to 24 tubes are stranded around jacketed dielectric central member together with PE fillers to form the cable core.

    The fibers and tubes are color coded for easy identification.

    All the interstices in the cable core are filled with a water blocking materials to prevent water penetration. Water swelling glass yarns are laid over the cable core to serve as peripheral dielectric strength members.

    A polyethylene jacket extruded over the glass yarns provides the final cable shape and protection. A ripcord is provided under the jacket to facilitate its removal.

    The cable is inserted into UV resistant high density polyethylene duct for wide range of uses including extreme temperatures, abrasive and high tension applications in underground installations.


    Cable Nominal Dimensions and Weight

    FIBER
    COUNT

    2-60

    61-72

    73-96

    97-120

    121-144

    145-216

    217-240

    241-288

    Cable
    Outer 
    Diameter

    inch

    0.4

    0.42

    0.49

    0.56

    0.62

    0.61

    0.64

    0.71

    mm

    10.1

    10.7

    12.5

    14.1

    15.7

    15.4

    16.2

    18

    Cable
    Weight

    lb/kft

    47

    53

    69

    97

    112

    97

    109

    134

    kg/km

    70

    79

    103

    145

    166

    145

    162

    200


    Cable Handling 

     

    Minimum bend radius with load
    Minimum bend radius with no load
    Minimum bend radius, storage coils 
    Maximum rated cable load (MRCL) 
    Maximum long term load

    15 x OD 
    10 x OD
    10 x OD
    600 lbs (2700 N)
    180 lbs (800N)





     

    Temperature Range  

     

    Installation
    Operation
    Storage 

    -300C to 600C (-220F to 1400F)
    -600C to 700C (-760F to 1580F)
    -400C to 750C (-400F to 1670F)

    Fiber Characteristics 

     

    Type

    Single mode

    Multi mode

    PHYSICAL Characteristics

     

     

    50/125

    62.5/125

    Core Diameter

    µm

     

    50.0 ± 2.5

    50.0 ± 2.5

    Clad Diameter

    µm

    125.0 ± 0.7

    125.0 ± 1.0

    125.0 ± 1.0

    Core/Clad Concentricity Error (Offset)

    µm

    ≤ 0.5,<0.2 typical

    ≤ 1.0

    ≤ 1.0

    Coating diameter

    µm

    235-245

    245 ± 10

    245 ± 10

    Tensile proof test

    kpsi

    100

    100

    100

    OPTICAL CHARACTERISTICS

     

     

     

     

    Attenuation for Wavelength at 1310 nm

    dB/km

    ≤0.34 (max), ≤0.32 typical

     

     

    Attenuation for Wavelength at 1550 nm

    dB/km

    ≤0.21 (max), ≤0.19 typical

     

     

    Attenuation for Wavelength at 850 nm

    dB/km

     

    ≤ 2.3

    ≤ 0.9

    Attenuation for Wavelength at 1300 nm

    dB/km

     

    ≤ 0.6

    ≤ 0.6

    Zero Dispersion Wavelength (λ0)

    Nm

    1302-1322

    1295-1340

    1320-1365

    MODE FIELD DIAMETER

     

     

     

     

    for wavelength 1310 nm

    µm

    9.2 ± 0.4

     

     

    for wavelength 1550 nm

    µm

    10.4 ± 0.5

     

     

    Cut-off wavelength (λcc)

    nm

    ≤ 1260

     

     

    Fibers and Tubes Color-Code per TIA/EIA 598A

    FIBER
    NO.

    1

    2

    3

    4

    5

    6

    7

    8

    9

    10

    11

    12

    COLOR

    Blue

    Orange

    Green

    Brown

    Slate

    White

    Red

    Black

    Yellow

    Violet

    Rose

    Aqua

    Polyethylene Duct Characteristics

    General specification:
    The duct is manufactured from virgin high density polyethylene
    The ducts are supplied with smooth walls and come either in orange color or in black with 3 orange stripes
    The duct is capable of being coiled in continuous lengths, transported, stored outdoors and subsequently uncoiled for installation – without affecting its properties or performance
    The duct performs in underground and above-ground installation an ambient temperature range of minus 300F to 1300F
    The duct specified for areal installations is ultraviolet light-resistant by UV light stabilizer protecting the duct for a minimum of 12 months in direct sunlight

    The duct is bent to a minimum (supported) radius of 10 outer diameters

    Tests on finishing duct are performed in accordance with:

    • ASTM D3035 Polyethylene Plastic Pipe Based on Controlled Outside Diameter 
    • ASTM D1248 Polyethylene Plastics Molding and Extrusion Materials (Type III, Class A, B or C, Category 5, grade P34)
    • ASTM D1693 Environmental Stress Cracking of Ethylene Plastics (Cond. B, F20/96 HRS)
    • ASTM D1238 Flow Rates of Thermoplastics by extrusion Plastometer
    • ASTM D638 Tensile properties of Plastics
    • ASTM D3350 Polyethylene Plastic Pipe and Fitting Materials (Cell #335440)
    • NEMA TC 7 Smooth-wall Coilable Polyethylene Electrical Plastic Duct