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Joined: Feb 2005
Posts: 12,354 Likes: 4
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Generally type CMR is used for both CM and CMR applications. This is because vertical runs at least between floors are all too frequent. Stocking and using a CM listed cable then switching to a CMR listed cable for those runs is impractical, given also that the cost is not much more.
Too bad that 2 pair CAT5e jacketed cross connect wire is not available in CMR and CMP so that it could be used for general use. I never understood why data cables are four pair when only two are ever used (except recently with 1000 baseT applications). What a waste these CGs create- as usual.
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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Joined: Mar 2005
Posts: 588
Moderator-Mobil Phones, Computers
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Moderator-Mobil Phones, Computers
Joined: Mar 2005
Posts: 588 |
Im not sure if you got your answer but if you wanted to keep things simple just buy cat5e and use it for both data and voice. Theres nothing wrong with that but it may cost a few more bucks. If you must use cat3 then just get cat3 4 pair. You also need to make sure that you get the correct cable as far as plenum or pvc goes. If your not sure just drop by your local electrical supply house, bring some of your existing cable with you, and ask questions!
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Joined: Sep 2006
Posts: 87
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Posts: 87 |
Originally posted by hbiss:
Generally type CMR is used for both CM and CMR applications. This is because vertical runs at least between floors are all too frequent. Stocking and using a CM listed cable then switching to a CMR listed cable for those runs is impractical, given also that the cost is not much more. I agree with you Hal. The reason CM is used so extensively with Systimax (high end product) is because those VARs who are installing Systimax are doing so in accordance with TIA and BICSI standards which call for each work area outlet (WAO) to be served by a telecommunications room (TR) on the same floor. The only cable passing through floors should be copper and fiber backbones.
Hans Broesicke, RCDD
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Joined: Feb 2005
Posts: 12,354 Likes: 4
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Joined: Feb 2005
Posts: 12,354 Likes: 4 |
If your not sure just drop by your local electrical supply house, bring some of your existing cable with you, and ask questions!
Yeah, just step up to the counter and say I need some of this here 'puter wire. Maybe the sparkie next to you will tell you how he wires doorbells and thermostats with it.
Unfortunately you already know more then they do just from reading this thread...
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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Joined: Sep 2006
Posts: 87
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Hans Broesicke, RCDD
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