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Any uses for cat3

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    Any uses for cat3

    I'm roughing in a house that has a lot of highspeed internet / fax / and cable TV locations. I have boxes of cat 3 wire that I have never used. Is it still acceptable to use this for the telephones only. I will pull seperate cat 5 for each computer location (I do know that).The local phone/ internet provider will do all the final connections as long as the wire is there. I dont want to look stupid if this is a stupid question and I dont know much about LV. I havent done any residential in a few years and Im sure what I use to do is obsolete. Also is looping wires between phone only locations still ok. Thanks in advance.

    #2
    You betcha. PBX's and and KSU's. More than enough for roping voice in a home too.

    I mostly just use cat5e for everything, since it's actually cheaper than cat3 where I buy wire.

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      #3
      doesn't anybody use cat6 for data ?

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        #4
        Originally posted by nakulak
        doesn't anybody use cat6 for data ?
        No, not a soul. I don't even know why they sell the stuff.

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          #5
          Tying up newspapers on recycle day
          The tail does NOT wag the dog.

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            #6
            Originally posted by quogueelectric
            Tying up newspapers on recycle day
            I guess you could use it for that, but I think that if a guy was to look into it a bit, cat5e is overkill for a lot of things. For instance, a Nortel Meridian phone system is among the more complex phone systems you'll commonly come across, and it only needs cat3 for most everything. I know I've run miles of cat5e in homes where POTS cable would have worked fine. Cat3 would have even been overkill. If I had a bunch of cat3 to use up, I'd use it up in homes (save except for home networks). VOIP and DSL will work great on cat3, since phone service often arrives to the home on cat-nothing.

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              #7
              Yes, for as long as we still use copper for voice, CAT-3 will be more than adequate for it. No, you should not loop-wire (i.e., diasy-chain) phone outlets; make individual home runs. Yes, you should stick with CAT-5e for networking.

              I used CAT-6 cable and jacks once for a fanatic geek. He paid for the entire 1000' spool, but it was still "his" wire when he called me back for more outlets. We installed about 50 network, coax, and phone jacks, many sharing plates.
              Master Electrician
              Electrical Contractor
              Richmond, VA

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                #8
                Most of the Fortune 500 companies near me have specified minimum CAT-6 cabling for several years. I have had a number of homeowner also specify CAT-6 cabling but we usually only install CAT-5E terminations with the idea that they could always upgrade later. I recently found a partial box of Lucent CAT-6 cable buried in one of my storage sheds.
                Curt Swartz
                Electrical Contractor

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                  #9
                  I worked on the nortel Meridian system for 2 years [my last job] and we used cat3 for the switch tails. If youre doing a house, I would probably use cat5 but if you are doing a whole tract, cat3 may be 'cheaper' as the price difference adds up. I have used cat6 many of times but usually when I am dealing with somethign that would require cat6, I usually just jump to fiber. I have seen cat7 before... working with cat6 is a pain - cat7 would be worse.

                  ~Matt
                  I would rather beg for forgiveness then beg for permission.

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                    #10
                    cat3 is fine for voice circuits. I see alot of commercial LV contractors still using cat3 for voice since its a little more compact and they can cram a few more in the conduit. Its also faster to work with when terminating it at blocks since the pairs dont have to be untwisted like cat5

                    FCC has a minimum standard for premise wiring which requires at least cat3. The old school quad with no twisted pairs is out, yet i still see some tract builders letting their alarm guys install the stuff

                    Cat5E is all that is needed for data. Cat6 is useless, and i cant figure out why they even make the stuff. There is NO data standard which requires cat6 and the stuff is a pain to work with. gigabit specs CAT5E, and 10-gig over copper requires CAT6-A which is a whole different beast than Cat6.

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                      #11
                      Originally posted by wireguru
                      FCC has a minimum standard for premise wiring which requires at least cat3.
                      You don't say? :grin:

                      Prove it!

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                        #12
                        Originally posted by mdshunk
                        You don't say? :grin:

                        Prove it!

                        link to FCC order http://www.fcc.gov/Bureaus/Common_Ca...0/fcc99405.doc

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                          #13
                          Wow... learned something new. I never knew that there was any federal law related to electrical wiring.

                          47CFR68.213(c) Material requirements.
                          (1) For new installations and modifications to
                          existing installations, copper conductors shall be, at a minimum, solid, 24
                          gauge or larger, twisted pairs that comply with the electrical
                          specifications for Category 3, as defined in the ANSI EIA/TIA Building
                          Wiring Standards.

                          Comment


                            #14
                            another law!

                            Another law....you can't use your megger for fishing!

                            Comment


                              #15
                              Originally posted by nakulak
                              doesn't anybody use cat6 for data ?
                              ive used cat 6 a few years ago. we used it in an office building and i guess the owner had a few extra bucks
                              "Most good electricians are pretty sure that they are the best and the great ones never stop trying to be."

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