Telephone Cables
Outdoor Telephone Cables Indoor Telephone Cables Indoor/Outdoor Telephone Cables Special Telephone Cables

Ordering Information

 Indoor Switchboard Telephone Cables to CW 1293

Application

The cables are designed to handle low frequency signals for short range applications,suitable for cross connecting individual items of switchboard equipment and to connect exchanges with internal distribution points. The cables are intended to be terminated in Insulation/displacement Connectors (IDC).

Standards

CW 1293

IEC 60189-2

IEC 60332-1

UL1581 VW-1 & UL1666

IEEE 383CI.IE

Construction

CW 1293

CW 1293

Conductors

Solid annealed bare copper 0.4/0.5/0.6/0.9mm as per class 1 of BS 6360 and IEC 60228

Insulation

Colour coded PVC T154 to BS 7878 or equivalent. LSZH option can be offered upon request

Twisted Pairs

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

Cabling Element

Twisted Pairs/Triples/Quads

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. For unit construction, the elements shall be pairs and shall be laid up as units or sub-units. Each unit shall consist of 20 pair

Core Wrapping

Cable containing more than 12 wires has a polyester tape applied over the cable core prior to sheathing

Screen (optional)

An aluminium polyester foil shield can be provided for fully enclosing the core with an overlap

Sheath

PVC TM51 to BS 7878 or equivalent. Grey, White or Cream colours are standard. LSZH option can be offered upon request

Ripcord

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

Drain Wire (optional)

For screened cables, a solid tinned 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 0.6 0.9
Conductor Size mm2 0.126 0.196 0.28 0.636
Maximum Conductor Resistance @20°C Ω/km 153 97.8 67.9 29.6
Minimum Insulation Resistance @500V DC @20°C MΩ.km 50 50 50 50
Maximum Capacitance Unbalance pair-to-pair * pF/500m *200/300 500 300 300
Minimum Insulation Thickness mm 0.15 0.15 0.15 0.25
Maximum Insulated Conductor Diameter mm 0.85 0.95 1.05 1.6

* For 25, 50 & 100 pair 0.4mm conductor size

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

The pair colour scheme for these cables complies with IEC 189-2 & 189-3 given in the Colour Code Chart below, with the exception of the 2 pair cable, which is constructed as a quad and a colour scheme of Blue, Green, Orange and Brown respectively.
Make-up & Unit Identification Colours – 20 Pair Unit

Pair Size 20 Pairs 40 Pairs 80 Pairs 160 Pairs 320 Pairs
Number of Units
Center 1 4 x ½ 1 4 x ½ 1
1st Layer     6 x ½ 6 5
2nd Layer         10
Colours of Unit Lappings
1 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
8       GREEN NATURAL
9 – 15         NATURAL
16         GREEN

Note 1: ½ refers to sub-units of 10 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 41 WHITE Orange BLUE 81 WHITE Brown BLUE
2 WHITE ORANGE 42 WHITE Orange ORANGE 82 WHITE Brown ORANGE
3 WHITE GREEN 43 WHITE Orange GREEN 83 WHITE Brown GREEN
4 WHITE BROWN 44 WHITE Orange BROWN 84 WHITE Brown BROWN
5 WHITE GREY 45 WHITE Orange GREY 85 WHITE Brown GREY
6 RED BLUE 46 ORANGE Red BLUE 86 RED Brown BLUE
7 RED ORANGE 47 ORANGE Red ORANGE 87 RED Brown ORANGE
8 RED GREEN 48 ORANGE Red GREEN 88 RED Brown GREEN
9 RED BROWN 49 ORANGE Red BROWN 89 RED Brown BROWN
10 RED GREY 50 ORANGE Red GREY 90 RED Brown GREY
11 BLACK BLUE 51 ORANGE Black BLUE 91 BROWN Black BLUE
12 BLACK ORANGE 52 ORANGE Black ORANGE 92 BROWN Black ORANGE
13 BLACK GREEN 53 ORANGE Black GREEN 93 BROWN Black GREEN
14 BLACK BROWN 54 ORANGE Black BROWN 94 BROWN Black BROWN
15 BLACK GREY 55 ORANGE Black GREY 95 BROWN Black GREY
16 YELLOW BLUE 56 YELLOW Orange BLUE 96 YELLOW Brown BLUE
17 YELLOW ORANGE 57 YELLOW Orange ORANGE 97 YELLOW Brown ORANGE
18 YELLOW GREEN 58 YELLOW Orange GREEN 98 YELLOW Brown GREEN
19 YELLOW BROWN 59 YELLOW Orange BROWN 99 YELLOW Brown BROWN
20 YELLOW GREY 60 YELLOW Orange GREY 100 YELLOW Brown GREY
21 WHITE Blue BLUE 61 WHITE Green BLUE 101 WHITE Grey BLUE
22 WHITE Blue ORANGE 62 WHITE Green ORANGE 102 WHITE Grey ORANGE
23 WHITE Blue GREEN 63 WHITE Green GREEN 103 WHITE Grey GREEN
24 WHITE Blue BROWN 64 WHITE- Green BROWN 104 WHITE Grey BROWN
25 WHITE Blue GREY 65 WHITE Green GREY 105 WHITE Grey GREY
26 RED Blue BLUE 66 GREEN Red BLUE 106 GREY Red BLUE
27 RED Blue ORANGE 67 GREEN Red ORANGE 107 GREY Red ORANGE
28 RED Blue GREEN 68 GREEN Red GREEN 108 GREY Red GREEN
29 RED Blue BROWN 69 GREEN Red BROWN 109 GREY Red BROWN
30 RED Blue GREY 70 GREEN Red GREY 110 GREY Red GREY
31 BLUE Black BLUE 71 GREEN Black BLUE 111 GREY Black BLUE
32 BLUE Black ORANGE 72 GREEN Black ORANGE 112 GREY Black ORANGE
33 BLUE Black GREEN 73 GREEN Black GREEN 113 GREY Black GREEN
34 BLUE Black BROWN 74 GREEN Black BROWN 114 GREY Black BROWN
35 BLUE Black GREY 75 GREEN Black GREY 115 GREY Black GREY
36 YELLOW Blue BLUE 76 YELLOW Green BLUE 116 YELLOW Grey BLUE
37 YELLOW Blue ORANGE 77 YELLOW Green ORANGE 117 YELLOW Grey ORANGE
38 YELLOW Blue GREEN 78 YELLOW Green GREEN 118 YELLOW Grey GREEN
39 YELLOW Blue BROWN 79 YELLOW Green BROWN 119 YELLOW Grey BROWN
40 YELLOW Blue GREY 80 YELLOW Green GREY 120 YELLOW Grey GREY

Note 1: In each triple there shall be a c-wire, coloured Turquoise.
Note 2: Uppercase letters indicate the base, solid colour of insulation, and the lower case indicates ink bands applied onto the base colour.

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