Wire and Cable Technology for LANs - LAN Wiring - page 106

TABLE 5.5
Color Code for 25-Pair Cable Pairs

Primary Color Secondary Color (Stripe)

Pair # Ring Tip

1 Blue White

2 Orange “

3 Green “

4 Brown “

5 Slate “

6 Blue Red

7 Orange “

8 Green “

9 Brown “

10 Slate “

11 Blue Black

12 Orange “

13 Green “

14 Brown “

15 Slate “

16 Blue Yellow

17 Orange “

18 Green “

19 Brown “

20 Slate “

21 Blue Violet

22 Orange “

23 Green “

24 Brown “

25 Slate “

on specifications for 25-pair cable which will allow its use for multi-outlet centers,
where modular furniture is used.
Cable sizes above 25 pairs are usually in multiples of the basic 25-pair bundle.
Each group of 25 pairs is called a binder group and is marked within the larger bun-
dle with a uniquely colored plastic binder that is spiral-wrapped along the bundle.
Groups of four or more binder groups may be wrapped and included in the same outer
jacket to form larger cables. The sheath of twisted-pair cabling should be clearly
marked by the manufacturer to show the level of performance that is guaranteed.
The marking normally shows three performance indicators, the EIA/TIA
Category, the UL/NEC permitted use, and the number and size of conductors. The