colour code 50pr bt cable 1

[kenmav]

could you plese tell me the colour code of a50pr (B.T.)CABLE

 

[InnoTech]

if you know your regular color codes you can remember this while terminating:

Why-----White
Run-----Red
Back----Black
You-----Yellow
Varmitt-Violet

hope it helps. "Jack of all trades. Master of none."

 

[daronwilson]

Basically telco cabling is done in groups of 5, with primary and secondary colors. Now, I always get those confused, but you have two sets of colors to remember (primary and secondary):

White
Red
Black
Yellow
Violet

and

Blue
Orange
Green
Brown
Slate

SO, everything starts with the 25 pair combination:

Pair 1 - white/blue
Pair 2 - white/orange
Pair 3 - white/green
Pair 4 - white/brown
Pair 5 - white/slate
Pair 6 - red/blue
Pair 7 - red/orange
Pair 8 - red/green
Pair 9 - red/brown
Pair 10 - red/slate
Pair 11 - black/blue
Pair 12 - black/orange

hopefully you see the pattern

Pair 24 - violet/brown
Pair 25 - violet/slate

There is your 25 pair basis for everything. If you have 50 pair to deal with, you have two 'binders' of 25 pairs each, one blue one, one orange one.

100 pair has 4 'binders' of 25 pair, blue, orange, green and brown.

Hope that is what you are looking for. Oh yes, there was quite a bit of old 26 pair at one point, and for the life of me I can't remember why they made it, but there was a 26th pair (white/red) i believe. Anyone know why that was out there for a bit?

Good Luck! It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com

 

[InnoTech]

daron, you always seem to give the best well stated posts. look at mine and then yours. lol

i've never seen a 26 pair cable so i couldn't begin to tell you why or for what they made it. "Jack of all trades. Master of none."

 

[ricos0]

I think the 26th pair was a spare. That's about the only thing that would make sense to me...

 

[AvayaNovice]

The 26th pair was a tracer pair.

Back in the old old days, OSP lead cable that was paper insulated had 101 pair groups, one pair was white blue (I think), and the other 100 were white red (every one of them). They were grouped, and that tracer pair is what you used to identify which group you were working with, same goes for that 26 pair cable. Didn't really serve a purpose though, and I can't remember if the remainder of the cable was standard color code.

I've spliced three or four lead sheathed cables with all white red pairs, it was a complete pain in the behind. 600 pair, in manhole, while it was raining. You do the math.

Toning each one out was terrible, but if you use a 710 press, you can connect a 25 pair mass tester (I have a CTC model) via this gnarly patch cord that looks like an ELCO connector, and tone them all out in sequence that way, makes life easier.