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    Indoor Central Office Cables to CW 1308

    Application

    The cables are designed to handle low frequency signals for short range applications, suitable for internal connection of telephone systems and other communications equipment. Also, they are designed to be terminated in insulation displacement connectors (IDC).Insulated and sheathed in PVC or LSZH, these cables offer an extremely cost effective general signal cable for fixed installation.

    Standards

    • CW 1308

    Construction

    Conductors

    Solid annealed copper sized 0.4/0.5mm as per class 1 of BS 6360/IEC 60228

    Insulation

    Colour coded PVC TI 54/LSZH for copper conductor & PVC TI 54/LSZH for the 1.38mm earth conductor

    Twisted Pairs

    Insulated conductors are twisted into pairs with varying lay length to minimize crosstalk

    Cabling Element

    Pairs or triples

    Cable Core Assembly

    There are two modes of construction: layer construction and unit construction. For layer construction, cables are laid up in concentric layers to form a compact and circular cable. Layer construction is for general use, including two cables for installation in customer’s premises where a good appearance is required. For Unit construction, the elements shall be pairs and laid up as units or sub-units. This include unit of 20 pairs which contain an insulated earth conductor of 1.38mm, for use with customer distribution schemes; unit of 16 pairs for use with the binary number system and unit of 30 pairs for use with Pulse Code Modulation (PCM) systems.

    Core Wrapping

    Cable containing more than 6 pairs have a polyester tape applied over the cable core prior to sheathing

    Screen (optional)

    A 24μ aluminium polyester foil shield can be provided for fully enclosing the core with an overlap

    Sheath

    PVC TM51 grade or LSZH compound. Grey, White, Cream or Black colours are standard

    Ripcord

    Nylon ripcord may be placed parallel to the cores to facilitate sheath removal

    Drain Wire (optional)

    For screened cables, a solid tinned 0.5mm copper drain wire may be longitudinally laid to ensure electrical continuity of the screen

    Electrical & Mechanical Properties

    Nominal Conductor Diameter

    mm

    0.4

    0.5

    1.38

    Conductor Size

    mm2

    0.126

    0.196

    1.495

    Maximum Conductor Resistance @20°C

    Ω/km

    153

    97.8

    12.4

    Minimum Insulation Resistance 500V DC @20°C

    MΩ.km

    50

    50

    N/A

    Maximum Capacitance Unbalance @0.8KHz-3.0KHz pair-to-pair pF/500m 200(Unit)/300(Layer) 500 N/A

    Minimum Insulation Thickness

    mm

    0.15 0.15

    0.55

    Maximum Insulated Conductor Diameter

    mm

    0.85 0.95

    3.5

    Mechanical and Thermal Properties

    Temperature range during operation (fixed state): -30°C – +70°C
    Temperature range during installation (mobile state): -20°C – +50°C 
    Minimum bending radius: 7.5 x Overall Diameter

    Color Code

    Make Up & Unit Identification Colours – 16 Pair Unit

    Pair Size 8 Pairs 16 Pairs 32 Pairs 64 Pairs 128 Pairs 256 Pairs
    Number of Units
    Centre
    1st Layer
    2nd Layer
    ½ 1 4 X ½ 1 4 X ½ 1
          6 X ½ 6 5
              10
    Unit No. Colours of Unit Lappings
    1 ORANGE ORANGE ORANGE ORANGE ORANGE ORANGE

    2

       

    GREEN

    ORANGE

    GREEN

    ORANGE

    3

       

     

    NATURAL

    ORANGE

    NATURAL

    4

       

     

    GREEN

    NATURAL

    NATURAL

    5

       

     

     

    NATURAL

    NATURAL

    6

       

     

     

    NATURAL

    GREEN

    7

       

     

     

    NATURAL

    ORANGE

    7

       

     

     

    GREEN

    NATURAL

    9-15

       

     

     

     

    NATURAL

    16

       

     

     

     

    GREEN

    Note: ½ refers to sub-units of 8 Pairs.

    Make Up & Unit Identification Colours – 20 Pair Unit

    Pair Size 10 Pairs 20 Pairs 40 Pairs 50 Pairs 80 Pairs 100 Pairs 160 Pairs 320 Pairs
    Number of Units
    Centre
    1st Layer
    2nd Layer
    ½ 1 4 X ½ 5 X ½ 1 1 4 X ½ 1
            6 X ½ 8 X ½ 6 5
              **   10
    Unit No. Colours of Unit Lappings

    1

    ORANGE

    ORANGE

    ORANGE

    ORANGE

    ORANGE

    ORANGE

    ORANGE

    ORANGE

    2

     

     

    GREEN

    NATURAL

    ORANGE

    ORANGE

    GREEN

    ORANGE

    3

     

     

     

    GREEN*

    NATURAL

    NATURAL

    ORANGE

    NATURAL

    4

     

     

     

     

    GREEN

    NATURAL

    NATURAL

    NATURAL

    5

     

     

     

     

     

    GREEN

    NATURAL

    NATURAL

    6

     

     

     

     

     

     

    NATURAL

    GREEN

    7

     

     

     

     

     

     

    NATURAL

    ORANGE

    7

     

     

     

     

     

     

    GREEN

    NATURAL

    9-15

     

     

     

     

     

     

     

    NATURAL

    16

     

     

     

     

     

     

     

    GREEN

    Note 1: ½ refers to sub-units of 10 Pairs.
    Note 2: These cables include the single 1.38mm diameter insulated conductor.
    * The Green colour lapping shall be applied to the last ½ unit.
    ** At the manufacturer’s discretion the first layer may be 4 x 1.
    Alternatively the centre layer may be 5 x 1 in which case the unit lappings shall be coloured Orange,3 x 1 Natural, Green.

    Make Up & Unit Identification Colours – 30 Pair Unit

    Pair Size 30 Pairs 120 Pairs 150 Pairs
    Number of Units
    Centre
    1st Layer
    1 1 1
      6 X ½ 8 X ½
    Unit No. Colours of Unit Lappings

    1

    ORANGE

    ORANGE

    ORANGE

    2

     

    ORANGE

    ORANGE

    3

     

    NATURAL

    NATURAL

    4

     

    GREEN

    BLUE

    5

     

     

    GREEN

    Note 1: ½ refers to sub-units of 15 Pairs.

    Colour Scheme for Pairs & Triples

    Cabling
    Element
    No.
    a-wire b-wire Cabling
    Element
    No.
    a-wire b-wire Cabling
    Element
    No.
    a-wire b-wire
    1 WHITE Blue BLUE White 11 BLACK Blue BLUE Black 21 VIOLET Blue BLUE Violet
    2 WHITE Orange ORANGE White 12 BLACK Orange ORANGE Black 22 VIOLET Orange ORANGE Violet
    3 WHITE

    Green

    GREEN

    White 13 BLACK Green GREEN Black 23 VIOLET Green GREEN Violet
    4 WHITE

    Brown

    BROWN

    White 14 BLACK Brown BROWN  Black 24 VIOLET Brown BROWN  Violet
    5 WHITE

    Grey

    GREY

    White 15 BLACK Grey GREY  Black 25 VIOLET Grey GREY  Violet
    6 RED Blue BLUE Red 16 YELLOW Blue BLUE Yellow 26 PINK Blue BLUE Pink
    7 RED Orange ORANGE Red 17 YELLOW Orange ORANGE Yellow 27 PINK Orange ORANGE Pink

    8

    RED

    Green

    GREEN

    Red

    18

    YELLOW

    Green GREEN

    Yellow

    28

    PINK

    Green

    GREEN

    Pink

    9

    RED

    Brown

    BROWN

    Red

    19

    YELLOW

    Brown BROWN 

    Yellow

    29

    PINK

    Brown

    BROWN

    Pink

    10

    RED

    Grey

    GREY

    Red

    20

    YELLOW

    Grey GREY 

    Yellow

    30

    PINK

    Grey

    GREY

    Pink

    In each triple, the c-wire shall be coloured TURQUOISE

    Dimensions And Weight

    Cable Code

    Number
    of
    Pairs

    Minimum Insulation
    Thickness
    mm

    Make Up

    Minimum Sheath
    Thickness
    mm

    Maximum Overall
    Diameter
    mm

    Nominal
    Weight
    kg/km

    0.4mm Conductor, 0.85mm Insulated Wire-Layer (Pair)

    TP1308-YY-2P04

    2

    0.15

    Layer

    0.4

    3.9

    15

    TP1308-YY-3P04

    3

    0.15

    Layer

    0.5

    5.3

    21

    TP1308-YY-4P04

    4

    0.15

    Layer

    0.5

    5.8

    25

    TP1308-YY-6P04

    6

    0.15

    Layer

    0.6

    6.8

    37

    TP1308-YY-10P04

    10

    0.15

    Layer

    0.6

    8.3

    54

    TP1308-YY-12P04

    12

    0.15

    Layer

    0.7

    8.9

    61

    TP1308-YY-20P04

    20

    0.15

    Layer

    0.7

    10.4

    95

    TP1308-YY-25P04

    25

    0.15

    Layer

    0.8

    11.1

    115

    0.5mm Conductor, 0.95mm Insulated Wire-Layer (Pair)

    TP1308-YY-3P05

    3

    0.15

    Layer

    0.65

    5.0

    25

    TP1308-YY-4P05

    4

    0.15

    Layer

    0.65

    5.8

    30

    TP1308-YY-6P05

    6

    0.15

    Layer

    0.6

    6.8

    40

    TP1308-YY-10P05

    10

    0.15

    Layer

    0.6

    8.3

    50

    TP1308-YY-12P05

    12

    0.15

    Layer

    0.7

    9.1

    75

    TP1308-YY-15P05

    15

    0.15

    Layer

    0.7

    9.8

    98

    TP1308-YY-20P05

    20*

    0.15

    Layer

    0.8

    10.7

    140

    TP1308-YY-25P05

    25

    0.15

    Layer

    0.8

    11.4

    184

    *This cable has an additional 0.5mm insulated conductor coloured VIOLET.

    Cable Code Number
    of
    Triples
    Minimum Insulation
    Thickness
    mm
    Minimum Primary
    Sheath Thickness
    mm
    Minimum Secondary
    Sheath Thickness
    mm
    Maximum Overall
    Diameter
    mm
    Nominal
    Weight
    kg/km
    0.4mm Conductor, 0.85mm Insulated Wire-Layer (Triple)

    TP1308-YY-1T04

    1

    0.15

    0.4

    3.8

    17

    TP1308-YY-5T04

    5

    0.15

    0.4

    0.8

    13.0

    45

    0.5mm Conductor, 0.95mm Insulated Wire-Layer (Triple)

    TP1308-YY-1T05

    1

    0.15

    0.4

    4.0

    20

    TP1308-YY-5T05

    5

    0.15

    0.4

    0.8

    13.5

    65

     

    Cable Code Number
    of
    Pairs
    Minimum Insulation
    Thickness
    mm
    Size of Unit Minimum Sheath
    Thickness
    mm
    Maximum Overall
    Diameter
    mm
    Nominal
    Weight
    kg/km
    0.4mm Conductor, 0.85mm Insulated Wire-Unit (Pair)

    TP1308-YY-8P04

    8

    0.15

    1/2*16

    0.6

    7.2

    45

    TP1308-YY-16P04

    16

    0.15

    16

    0.7

    9.8

    80

    TP1308-YY-32P04

    32

    0.15

    16

    0.8

    12.0

    145

    TP1308-YY-64P04

    64

    0.15

    16

    1.1

    16.0

    260

    TP1308-YY-30P04

    30

    0.15

    30

    0.8

    11.8

    130

    TP1308-YY-120P04

    120

    0.15

    30

    1.6

    24.8

    480

    TP1308-YY-150P04

    150

    0.15

    30

    1.7

    26.0

    590

    0.5mm Conductor, 0.95mm Insulated Wire-Unit (Pair)

    TP1308-YY-8P05

    8

    0.15

    1/2*16

    0.6

    7.6

    65

    TP1308-YY-16P05

    16

    0.15

    16

    0.7

    10.2

    115

    TP1308-YY-32P05

    32

    0.15

    16

    0.8

    12.4

    205

    TP1308-YY-64P05

    64

    0.15

    16

    1.1

    16.5

    390

    TP1308-YY-128P05

    128

    0.15

    16

    1.6

    25.4

    785

    TP1308-YY-256P05

    256

    0.15

    16

    2.0

    35.2

    1460

    TP1308-YY-(10P+E)05

    10+E

    0.15

    1/2*20

    0.6

    8.6

    85

    TP1308-YY-(20P+E)05

    20+E

    0.15

    20

    0.7

    12.0

    160

    TP1308-YY-(40P+E)05

    40+E

    0.15

    20

    0.9

    15.0

    371

    TP1308-YY-(50P+E)05

    50+E

    0.15

    20

    1.0

    17.0

    427

    TP1308-YY-(80P+E)05

    80+E

    0.15

    20

    1.2

    22.5

    610

    TP1308-YY-(100P+E)05

    100+E

    0.15

    20

    1.5

    27.0

    630

    TP1308-YY-(160P+E)05

    160+E

    0.15

    20

    1.7

    30.3

    1059

    TP1308-YY-(320P+E)05

    320+E

    0.15

    20

    2.2

    39.5

    2255

    TP1308-YY-30P05

    30

    0.15

    30

    0.8

    12.2

    190

    TP1308-YY-120P05

    120

    0.15

    30

    1.6

    25.1

    765

    TP1308-YY-150P05

    150

    0.15

    30

    1.7

    26.0

    1100

    Note: For those cables with BT designation suffixed E contain a 1.38mm diameter insulated earth conductor

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