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".

Sources

See also

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