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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