Telephone Cables

 Colour Codes & Cable Make Up

Identification of basic sub-units, construction of 50 and 100 pair units, and cable cores of up to 100 pairs

20 pairs        30 pairs           50 pairs              70 pairs              100 pairs

Identification of basic units and cable core constructions for cables of more than 100 pairs - Numbered units

150 pairs (3 x 50p)     200 pairs (4 x 50p)     300 pairs (6 x 50p)      400 pairs (8 x 50p)

500 pairs (5 x 100p)  600 pairs (6 x 100p)   800 pairs (8 x 100p)   900 pairs (9 x 100p)

1000 pairs (10 x 100p)       1200 pairs (12 x 100p)   1500 pairs (15 x 100p)       1800 pairs (18 x 100p)


2100 pairs (21 x 100p)          2400 pairs (24 x 100p)    2700 pairs (27 x 100p)            3000 pairs (30 x 100p)

G) Colour Code & Cable Make Up According to GR-421, ICEA S-85-625 & ICEA S-84-608

Pair Identification Colours
For pairs numbering 1 through 25, the pair identification colours are outlined below. In cable constructions containing more than 25 pairs, the colours are repeated as necessary. Colour coded binders are used to identify 25 pair groups of colour coded pairs.

Pair Number

Tip Colour

Ring Colour

Pair Number

Tip Colour

Ring Colour

1

WHITE

BLUE

13

BLACK

GREEN

2

WHITE

ORANGE

14

BLACK

BROWN

3

WHITE

GREEN

15

BLACK

GREY

4

WHITE

BROWN

16

YELLOW

BLUE

5

WHITE

GREY

17

YELLOW

ORANGE

6

RED

BLUE

18

YELLOW

GREEN

7

RED

ORANGE

19

YELLOW

BROWN

8

RED

GREEN

20

YELLOW

GREY

9

RED

BROWN

21

VIOLET

BLUE

10

RED

GREY

22

VIOLET

ORANGE

11

BLACK

BLUE

23

VIOLET

GREEN

12

BLACK

ORANGE

24

VIOLET

BROWN

 

 

 

25

VIOLET

GREY

Identification of Groups of Pairs
For cables through 600 pairs, 25 pair groups are identified by their binder colours in the same sequence as the pair identification is accomplished. Group 1 has White-Blue binders. Group 2 has White-Orange binders, etc. In this manner, each pair is uniquely identified. In cables having 25 pairs or less, binders are normally not used. However, if specified, the binders will be Group 1, White-Blue. For cables of 100 pairs or less, the use of the White binder is optional.

Group
Number

Group Pair
Counts

Colour of Binders

Group
Number

Group Pair
Counts

Colour of Binders

1

1-25

WHITE

BLUE

13

301-325

BLACK

GREEN

2

26-50

WHITE

ORANGE

14

326-350

BLACK

BROWN

3

51-75

WHITE

GREEN

15

351-375

BLACK

GREY

4

76-100

WHITE

BROWN

16

376-400

YELLOW

BLUE

5

101-125

WHITE

GREY

17

401-425

YELLOW

ORANGE

6

126-150

RED

BLUE

18

426-450

YELLOW

GREEN

7

151-175

RED

ORANGE

19

451-475

YELLOW

BROWN

8

176-200

RED

GREEN

20

476-500

YELLOW

GREY

9

201-225

RED

BROWN

21

501-525

VIOLET

BLUE

10

226-250

RED

GREY

22

526-550

VIOLET

ORANGE

11

251-275

BLACK

BLUE

23

551-575

VIOLET

GREEN

12

276-300

BLACK

ORANGE

24

576-600

VIOLET

BROWN

Super-units Binder Identification Colours
It is desirable for manufacturing purposes to combine four 25 pair groups into “super units” when cables have 900 pairs or more.

Pair Number

Group Number

Binder Colour

1-600

1-24

WHITE

601-1200

25-48

RED

1201-1800

49-72

BLACK

1801-2400

73-96

YELLOW

2401-3000

97-120

VIOLET

3001-3600

121-144

BLUE

3601-4200

145-168

ORANGE

Standard Telephone Cable
Various arrangements of pairs, units, groups, and super units are possible for standard non-screened telephone cables both filled and aircore.
The following constructions illustrate the lay-ups normally provided. Cables containing 1200 pairs or more are also available with mirror image core constructions as shown.

Unit Assemblies (Units or U)  Group Assemblies (Group or G)

 

 

 

 

 

 

Super Units Assemblies (Super Units or SU)

 

 

 

 

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