External Cable Colour Code

The table below gives the colour-coding for external communications cables up to 100 pairs. The colour-code is based on the five-colour sequence of blue, orange, green, brown, slate which are used in that order with a white mate for the first five pairs.

Knowing this sequence of five colours allows you to easily determine the order of the remaining pairs as follows: The next five pairs use a red mate (in place of the white mate), again using the "Line -" colours of blue, orange, green, brown, slate. The first ten pairs are bound together by a Blue binder-tape.

The second ten pairs repeat the sequence above, the only difference is that they are bound together with an Orange binder-tape. The binder-tape colour-sequence is shown below.

Pairs Binder-tape colours
Pairs 1-10 Blue binder
Pairs 11-20 Orange binder
Pairs 21-30 Green binder
Pairs 31-40 Brown binder
Pairs 41-50 Slate binder
Pairs 51-60 Blue/White binder
Pairs 61-70 Blue/Orange binder
Pairs 71-80 Blue/Green binder
Pairs 81-90 Blue/Brown binder
Pairs 91-100 Blue/Slate binder

Pair Line + Line -
1 White Blue
2 White Orange
3 White Green
4 White Brown
5 White Slate
6 Red Blue
7 Red Orange
8 Red Green
9 Red Brown
10 Red Slate