THE 50-PAIR WIRE COLOR CODE

50 Wire Color Code

THE 50-PAIR WIRE COLOR CODE

By: Don McClatchie

The 50-pair twisted wire color code standard for telephones and other telecommunications is easy to understand when you get to know it. Planning your installation and using the correct pairs in the right order will help you stay organized and let you to keep track of what wire does what. Twisted pair telecommunications cables come in a variety of sizes numbered in wire pair sets from 1 pair up to 900 pairs and more all set up into 25 pair groups.

Look at the table below, the color code starts with a base color or “wire color” the first on the list is “white” and second color “blue” is in the form of a strip on the wire. By reading these two colors the base and the strip you can determine which wire pair out of the group of 25 wire pairs you have. The color code ends with the colors slate for the wire and violet for the strip.
Also, notice the “tip +” and “ring –“ notation, if you are using these wires for balanced audio you should be careful to connect the positive audio signal to the tip + and the negative audio signal to the ring – wires. Do the same for video, the center conductor of video should connect to the tip + and the shield of the video should be connected to the ring -. As far as the twisted pair wire is concerned electrically it makes no difference which way you wire these signals, however it will save you time and make a more professional installation if you get into the habit of doing it this way and at the other end of the wires you won’t have to experiment to get the polarity right.

The color code has 25 different variations to mark 25 wire pairs separately after that the numbers repeat for the next group of 25 wire pairs. So, looking on the table below you will see that wire pair 26 starts with white and blue again repeating the color pattern for the next 25 pairs and ends with slate and violet just like the first 25 pairs.

Each set of 25 wire pairs in these larger cables are called a “binder group” and each binder group in the cable is marked by a colored mylar ribbon that uses the same color code to mark the group. In the 50-pair wire cable there are two binder groups the first one is marked with a white /blue mylar ribbon to indicate that it is the number 1 binder group the second set of 25 wires is marked with a white/orange mylar ribbon to indicate that it is the number 2 binder group and so on for any size binder group cable.
Cables with more than 600 pairs use 100 pair binder groups wrapped with a mylar binder ribbon matching the “tip +” color of the color code starting with white and is repeated in 600 pair groups indefinitely. Get to know the color code and use it to your advantage to simplify your installations and remove the guess work.

THE 50 PAIR WIRE COLOR CODE

By: Don McClatchie

The 50-pair twisted wire color code standard for telephones and other telecommunications is easy to understand when you get to know it. Planning your installation and using the correct pairs in the right order will help you stay organized and let you to keep track of what wire does what. Twisted pair telecommunications cables come in a variety of sizes numbered in wire pair sets from 1 pair up to 900 pairs and more all set up into 25 pair groups.

Look at the table below, the color code starts with a base color or “wire color” the first on the list is “white” and second color “blue” is in the form of a strip on the wire. By reading these two colors the base and the strip you can determine which wire pair out of the group of 25 wire pairs you have. The color code ends with the colors slate for the wire and violet for the strip.

Also, notice the “tip +” and “ring –“ notation, if you are using these wires for balanced audio you should be careful to connect the positive audio signal to the tip + and the negative audio signal to the ring – wires. Do the same for video, the center conductor of video should connect to the tip + and the shield of the video should be connected to the ring -. As far as the twisted pair wire is concerned electrically it makes no difference which way you wire these signals, however it will save you time and make a more professional installation if you get into the habit of doing it this way and at the other end of the wires you won’t have to experiment to get the polarity right.

The color code has 25 different variations to mark 25 wire pairs separately after that the numbers repeat for the next group of 25 wire pairs. So, looking on the table below you will see that wire pair 26 starts with white and blue again repeating the color pattern for the next 25 pairs and ends with slate and violet just like the first 25 pairs.

Each set of 25 wire pairs in these larger cables are called a “binder group” and each binder group in the cable is marked by a colored mylar ribbon that uses the same color code to mark the group.  In the 50-pair wire cable there are two binder groups the first one is marked with a white /blue mylar ribbon to indicate that it is the number 1 binder group the second set of 25 wires is marked with a white/orange mylar ribbon to indicate that it is the number 2 binder group and so on for any size binder group cable.

Cables with more than 600 pairs use 100 pair binder groups wrapped with a mylar binder ribbon matching the “tip +” color of the color code starting with white and is repeated in 600 pair groups indefinitely. Get to know the color code and use it to your advantage to simplify your installations and remove the guess work.

                               50 PAIR WIRE COLOR CODE
WIRE#  PAIR POLARITY WIRE COLOR STRIP/COLOR WIRE# PAIR POLARITY WIRE COLOR STRIP/COLOR
1 1 TIP + WHITE BLUE 51 26 TIP + WHITE BLUE
2 1 RING – BLUE WHITE 52 26 RING – BLUE WHITE
3 2 TIP + WHITE ORANGE 53 27 TIP + WHITE ORANGE
4 2 RING – ORANGE WHITE 54 27 RING – ORANGE WHITE
5 3 TIP + WHITE GREEN 55 28 TIP + WHITE GREEN
6 3 RING – GREEN WHITE 56 28 RING – GREEN WHITE
7 4 TIP + WHITE BROWN 57 29 TIP + WHITE BROWN
8 4 RING – BROWN WHITE 58 29 RING – BROWN WHITE
9 5 TIP + WHITE SLATE 59 30 TIP + WHITE SLATE
10 5 RING – SLATE WHITE 60 30 RING – SLATE WHITE
11 6 TIP + RED BLUE 61 31 TIP + RED BLUE
12 6 RING – BLUE RED 62 31 RING – BLUE RED
13 7 TIP + RED ORANGE 63 32 TIP + RED ORANGE
14 7 RING – ORANGE RED 64 32 RING – ORANGE RED
15 8 TIP + RED GREEN 65 33 TIP + RED GREEN
16 8 RING – GREEN RED 66 33 RING – GREEN RED
17 9 TIP + RED BROWN 67 34 TIP + RED BROWN
18 9 RING – BROWN RED 68 34 RING – BROWN RED
19 10 TIP + RED SLATE 69 35 TIP + RED SLATE
20 10 RING – SLATE RED 70 35 RING – SLATE RED
21 11 TIP + BLACK BLUE 71 36 TIP + BLACK BLUE
22 11 RING – BLUE BLACK 72 36 RING – BLUE BLACK
23 12 TIP + BLACK ORANGE 73 37 TIP + BLACK ORANGE
24 12 RING – ORANGE BLACK 74 37 RING – ORANGE BLACK
25 13 TIP + BLACK GREEN 75 38 TIP + BLACK GREEN
26 13 RING – GREEN BLACK 76 38 RING – GREEN BLACK
27 14 TIP + BLACK BROWN 77 39 TIP + BLACK BROWN
28 14 RING – BROWN BLACK 78 39 RING – BROWN BLACK
29 15 TIP + BLACK SLATE 79 40 TIP + BLACK SLATE
30 15 RING – SLATE BLACK 80 40 RING – SLATE BLACK
31 16 TIP + YELLOW BLUE 81 41 TIP + YELLOW BLUE
32 16 RING – BLUE YELLOW 82 41 RING – BLUE YELLOW
33 17 TIP + YELLOW ORANGE 83 42 TIP + YELLOW ORANGE
34 17 RING – ORANGE YELLOW 84 42 RING – ORANGE YELLOW
35 18 TIP + YELLOW GREEN 85 43 TIP + YELLOW GREEN
36 18 RING – GREEN YELLOW 86 43 RING – GREEN YELLOW
37 19 TIP + YELLOW BROWN 87 44 TIP + YELLOW BROWN
38 19 RING – BROWN YELLOW 88 44 RING – BROWN YELLOW
39 20 TIP + YELLOW SLATE 89 45 TIP + YELLOW SLATE
40 20 RING – SLATE YELLOW 90 45 RING – SLATE YELLOW
41 21 TIP + VIOLET BLUE 91 46 TIP + VIOLET BLUE
42 21 RING – BLUE VIOLET 92 46 RING – BLUE VIOLET
43 22 TIP + VIOLET ORANGE 93 47 TIP + VIOLET ORANGE
44 22 RING – ORANGE VIOLET 94 47 RING – ORANGE VIOLET
45 23 TIP + VIOLET GREEN 95 48 TIP + VIOLET GREEN
46 23 RING – GREEN VIOLET 96 48 RING – GREEN VIOLET
47 24 TIP + VIOLET BROWN 97 49 TIP + VIOLET BROWN
48 24 RING – BROWN VIOLET 98 49 RING – BROWN VIOLET
49 25 TIP + VIOLET SLATE 99 50 TIP + VIOLET SLATE
50 25 RING – SLATE VIOLET 100 50 RING – SLATE VIOLET

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