Categories: Technology
20-pair colour code Australia
The 20-pair colour code is a colour code used in Australia to identify individual conductors in a kind of electrical telecommunication wiring for indoor use, known as twisted pair cables. The colours are applied to the insulation that covers each conductor. The first colour is chosen from one group of five colours.
The combinations are also shown in the table below showing the colour for each wire (“1” and “2”) and the pair number.
| 1-20 | 21-40 | 41-60 | 61-80 | 81-100 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pair # | First wire/ A Leg (L+) | Second wire/ B Leg (L-) | Pair # | First wire/ A Leg (L+) | Second wire/ B Leg (L-) | Pair # | First wire/ A Leg (L+) | Second wire/ B Leg (L-) | Pair # | First wire/ A Leg (L+) | Second wire/ B Leg (L-) | Pair # | First wire/ A Leg (L+) | Second wire/ B Leg (L-) |
| 1 | White | Blue | 21 | Yellow | Blue | 41 | Black | Blue | 61 | Violet | Blue | 81 | Red | Blue |
| 2 | Orange | 22 | Orange | 42 | Orange | 62 | Orange | 82 | Orange | |||||
| 3 | Green | 23 | Green | 43 | Green | 63 | Green | 83 | Green | |||||
| 4 | Brown | 24 | Brown | 44 | Brown | 64 | Brown | 84 | Brown | |||||
| 5 | Slate | 25 | Slate | 45 | Slate | 65 | Slate | 85 | Slate | |||||
| 6 | Blue-White | 26 | Blue-White | 46 | Blue-White | 66 | Blue-White | 86 | Blue-White | |||||
| 7 | Blue-Orange | 27 | Blue-Orange | 47 | Blue-Orange | 67 | Blue-Orange | 87 | Blue-Orange | |||||
| 8 | Blue-Green | 28 | Blue-Green | 48 | Blue-Green | 68 | Blue-Green | 88 | Blue-Green | |||||
| 9 | Blue-Brown | 29 | Blue-Brown | 49 | Blue-Brown | 69 | Blue-Brown | 89 | Blue-Brown | |||||
| 10 | Blue-Slate | 30 | Blue-Slate | 50 | Blue-Slate | 70 | Blue-Slate | 90 | Blue-Slate | |||||
| 11 | Orange-White | 31 | Orange-White | 51 | Orange-White | 71 | Orange-White | 91 | Orange-White | |||||
| 12 | Orange-Green | 32 | Orange-Green | 52 | Orange-Green | 72 | Orange-Green | 92 | Orange-Green | |||||
| 13 | Orange-Brown | 33 | Orange-Brown | 53 | Orange-Brown | 73 | Orange-Brown | 93 | Orange-Brown | |||||
| 14 | Orange-Slate | 34 | Orange-Slate | 54 | Orange-Slate | 74 | Orange-Slate | 94 | Orange-Slate | |||||
| 15 | Green-White | 35 | Green-White | 55 | Green-White | 75 | Green-White | 95 | Green-White | |||||
| 16 | Green-Brown | 36 | Green-Brown | 56 | Green-Brown | 76 | Green-Brown | 96 | Green-Brown | |||||
| 17 | Green-Slate | 37 | Green-Slate | 57 | Green-Slate | 77 | Green-Slate | 97 | Green-Slate | |||||
| 18 | Brown-White | 38 | Brown-White | 58 | Brown-White | 78 | Brown-White | 98 | Brown-White | |||||
| 19 | Brown-Slate | 39 | Brown-Slate | 59 | Brown-Slate | 79 | Brown-Slate | 99 | Brown-Slate | |||||
| 20 | Slate-White | 40 | Slate-White | 60 | Slate-White | 80 | Slate-White | 100 | Slate-White | |||||
Note that there is no colour called “Grey”. The correct colour terminology is “Slate”.