cat 5 e FREE cabling and networking Helpdesk
 Question by Becki Goddard posted 06 Feb 2001
 cat 5 e
we want to run a 50pr cable from our outdoor hub underground to the indoor hub and then split to our prospective locations using a 25pr cable, when choosing or finding the appropriate cable what coding do we need? Stranded, unstranded, shielded, unshielded it seems confusing to us laymen. your help would be greatly appreciated
 Answer by Dmitri Abaimov posted 14 Feb 2001
Dear Becki,

I suggest that the best help for you and your colleagues would be to read BICSI's "Customer Owned Outside Plant Design Manual". This book will be an invaluable source of information if you need to start it from the beginning.

Of course, I can't express in couple words the content of the 300+ pages manual, but I'll try to stress maybe some of the most important parts of the job you're approaching.

  • Please hire licensed professional organization to handle the job, especially if ground excavating/trenching is planned.

  • Make sure you're ordering appropriate type of cable. The one you need would be ASP-filled core cable. You would see something like ANMW-0050 on the 50-pair cable outher sheath

  • You wrote 'cat5 e' in the subject of your question. If this is a cabling category you're to achieve, please note that there are no CAT5(CAT5E) OSP cables with pair counts more than four (4). Thus with multipairs you're limited to CAT 3

  • OSP cables are NOT flame-returdant. You cannot put more that 15 meters (50 feet) of that kind of cable indoors. Otherwise you have to enclose it into a metal conduit or splice it with pairs of indoor (PVC jacketed) cable

  • All OSP cables will be unstranded (solid copper conductors) and shielded with corrugated aluminum

Here were some of my most basic considerations. Please let me know if you have more detailed questions in mind.

Again, please pay attention to the manual I referenced above. You'll find all the information at BICSI's website (see link at bottom of every page on our site). The manual is not cheap, but it worth it.

Dmitri Abaimov, RCDD

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