Applied Users Forums

Hardware & Infrastructure => Hardware => Topic started by: Lynne Desrochers on May 24, 2011, 03:38:28 PM

Title: cable - what kind?
Post by: Lynne Desrochers on May 24, 2011, 03:38:28 PM
We are doing some renovations. One of my cabling quotes came back indicating they would be using Cat5e plenum. What is that? Is that what you all would recommend? Thanks in advance!
Title: Re: cable - what kind?
Post by: Jeff Zylstra on May 24, 2011, 03:47:57 PM
The "plenum" rated cable has to do with what it does in a fire. IE Smoke, toxicity, etc...  If any of this cable is to be run in a cold air return or something like that, then by building code, it has to be plenum rated.  Unfortunately, if you have a "drop ceiling", that can be considered a cold air return and you'll need to use the plenum rated wire.


http://www.l-com.com/content/FAQ.aspx?Type=FAQ&ID=4838
Title: Re: cable - what kind?
Post by: Orlando Alonzo on May 24, 2011, 03:49:13 PM
I believe the plenum portion refers to the outside housing of the cable. Makes the cable tougher for pulling through in commercial spaces. Cat5e is fine. I'm just curious why not Cat6?
Title: Re: cable - what kind?
Post by: Lynne Desrochers on May 24, 2011, 03:54:29 PM
I don't know why not Cat6? Is that what all of you would use now? Thanks!
Title: Re: cable - what kind?
Post by: Bloody Jack Kidd on May 24, 2011, 04:07:19 PM
Cat5e will do GBit - but I'd think most new installs are Cat 6.  As Jeff noted, plenum is for code compliance when it comes to fires.
Title: Re: cable - what kind?
Post by: Billy Welsh on May 24, 2011, 04:12:26 PM
Check with your landlord (if you have one) on the plenum.  In a typical office building with dropped ceilings it is required.

And CAT 6 is now considered the standard - usually not much price difference these days from 5e.
Title: Re: cable - what kind?
Post by: Jeff Zylstra on May 24, 2011, 04:12:41 PM
A quick check on the internet says that for 1,000 of cable, the price difference is about $75.  I would go with CAT 6, since it "future proofs" you to whatever extent that is possible.  
Title: Re: cable - what kind?
Post by: Hans Manhave on May 24, 2011, 05:54:48 PM
The longer your run, the more it will matter if you have the Cat5e or Cat6 when you are running 1Gb.  I have been told that devices may connect with Cat5e and form a 1Gb connection, but that such connection will be subpar as compared to Cat6.
Title: Re: cable - what kind?
Post by: Lynne Desrochers on May 25, 2011, 10:57:55 AM
Thanks everyone! You have another satisfied customer!