Home Page link

Phone Lines and Electrical Wiring

Home Repair - - If it ain't broken, don't fix it. Otherwise look here. 

Page 1 of 3       1 2 3 > last >> Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
Phone Lines and Electrical Wiring JWJWJ 11-24-2006
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by JWJWJ on November 24, 2006, 6:26 pm


On residential new construction, how close can a interior phone line be to
electrical wiring without being affected by electromagnetics? Can they
cross each other?

Posted by RBM on November 24, 2006, 6:59 pm


The "book" on phone wiring says you can run them perpendicular but not
parallel to each other. I've run them parallel in the same drilled holes in
studs for short distances with no problems


> On residential new construction, how close can a interior phone line be to
> electrical wiring without being affected by electromagnetics? Can they
> cross each other?



Posted by on November 24, 2006, 7:48 pm


On Fri, 24 Nov 2006 17:26:45 -0600, "JWJWJ"

>On residential new construction, how close can a interior phone line be to
>electrical wiring without being affected by electromagnetics? Can they
>cross each other?

If you use twisted pair phone wire there is no limit.

Posted by J.A. Michel on November 24, 2006, 9:26 pm


Others will tell you different, but I have ran phone, cat5e and Romex all
together. In fact, when I wired my garage, the phone cable (I used cat5e
cable) was ziptied to the main run of Romex cables for the whole garage. No
problems with it at all. My phone cable is brought to my house hanging
underneath the main lines, and people want you to believe that a 120V cable
is going to cause a interference problem. nada!



> On residential new construction, how close can a interior phone line be to
> electrical wiring without being affected by electromagnetics? Can they
> cross each other?



Posted by Pete C. on November 24, 2006, 9:37 pm


"J.A. Michel" wrote:
>
> Others will tell you different, but I have ran phone, cat5e and Romex all
> together. In fact, when I wired my garage, the phone cable (I used cat5e
> cable) was ziptied to the main run of Romex cables for the whole garage. No
> problems with it at all. My phone cable is brought to my house hanging
> underneath the main lines, and people want you to believe that a 120V cable
> is going to cause a interference problem. nada!

It would if you were using the old four wire, non twisted cat 0 phone
wire. Since you are using cat 5 wire which is twisted pair the twist
cancels out the common mode interference that would most certainly have
been picked up with the old untwisted wire.

As for the drop to the house which is likely non twisted drop cable, it
is not in close enough proximity to be a problem. The magnetic field
that induces interference drops off in strength rapidly with distance.

Pete C.

Page 1 of 3       1 2 3 > last >>
Similar ThreadsPosted
really old phone lines August 24, 2008, 1:37 pm
Isn't/Wasn't there a shorage of phone lines? February 14, 2007, 4:03 pm
Running Electric, Phone and Television lines March 23, 2006, 7:46 pm
Three lines attached to single electrical receptacle?? November 9, 2005, 11:41 am
Phone wiring September 24, 2007, 2:52 pm
Home phone wiring March 10, 2006, 8:10 am
Extended Phone Wiring November 21, 2007, 7:15 pm
Phone wiring question April 28, 2008, 1:16 am
Stupid phone wiring trick August 29, 2006, 2:01 pm
Phone wiring question: RJ11 to RJ45 October 14, 2006, 9:52 pm

Contact Us | Privacy Policy

XML SitemapXML Sitemap