Subject: RE Electrical wiring (Woodley)... (Pritchett)
Date: Thu, 9 Sep 1999 123410 -0500 (CDT)
From: "Roy L. Beavers"
To: emfguru
--------------------------------------------------
.........Here is the answer to the "cat 5" wiring question......
Roy Beavers (EMFguru)......
rbeavers@llion.org.......
.....It is better to light a single candle than to curse the darkness.....
EMF-L web-site can be found at:
EMF-L archives can be found at:
..................PEOPLE ARE MORE IMPORTANT THAN PROFITS..................
---------- Forwarded message ----------
Date: Thu, 9 Sep 1999 09:33:39 -0700
From: "Robert L. Pritchett"
To: "Roy L. Beavers"
Subject: RE: Electrical wiring (Woodley)...
Old Quad wiring (common house cable for phones) isn't twisted very well.
Each pair of Cat 5 wiring is highly twisted. The "minimum standard" for
housing today is Cat 3 which can handle 10 Mbps, and doesn't have as tight a
twist as the Cat 5 cabling which can handle 100 Mbps. The twists are
designed to cancel out crosstalk interference between copper pairs and other
copper anomalies (attenuation problems, etc.) That's the key. The twists are
designed to cancel out electrical charateristics. I would have to say that
EMF fields would be less with Cat 5 cable than with Quad cable (the old
house 4-wire stuff) if using telephony applications (phones, modems,
security systems, etc.). Now when you attempt to run it at higher
frequencies like 1000Mbps, then you will see problems. That is why I wrote
my article at http://www.scm-ae.com/robertscorner on fiber-to-the-desk to
eliminate the EMF issue all together in using telephony applications. I
posted it Tuesday. Why not run fiber in your home? It's cheap.
The other thing you can do is run EMT conduit in your new home and run the
cables inside it. The metal conduit acts as a shield, so you won't be having
problems, and you will have created a path for your telephony cables for
future technologies - like fiber. It sure beats stapling the cables inside
the walls!
You're real problems will be if the electrical outlets haven't been properly
grounded because there is more field strength caused by power lines in the
home, than by the low voltage lines used by phone systems or data networks.
----------------------------------------------------------------------------
----
Robert L. Pritchett, RCDD LAN Specialist
Telecom Designer/Engineer
SCM Consultants, Inc.
7601 W. Clearwater Ave Suite 301
Kennewick, WA 99336
Phone: 509-783-1625
FAX: 509-783-1861
Pager: 509-530-8324
http://www.scm-ae.com/robertscorner
robertp@scm-ae.com
-----Original Message-----
From: Roy L. Beavers [mailto:rbeavers@llion.org]
Sent: Wednesday, September 08, 1999 3:08 PM
To: emfguru
Subject: Electrical wiring (Woodley)...
---------- Forwarded message ----------
Date: Wed, 08 Sep 1999 17:55:41 -0400
From: "Richard W. Woodley"
To: rbeavers@llion.org
Cc: IRCP@aol.com
Subject: Electrical wiring
As this is beyond my are of knowledge I am forwarding it to the EMF-L
mailing ist where one of the experts there may be able to assist you. Just
what is cat 5 wiring and is it approved by building codes.
>From: IRCP@aol.com
>Date: Wed, 8 Sep 1999 10:51:59 EDT
>Subject: (no subject)
>To: woodley@igs.net
>X-Mailer: AOL 4.0 for Windows 95 sub 21
>
> If you wire a new home with the new generation wiring (cat5) and you
wire
>another new home with older conventional wiring, will the new generation
>wiring cause that home to have higher EMF fields?
>
>
********************* Richard W. Woodley *********************
woodley@igs.net *********** http://www.ncf.carleton.ca/~ab190/
--------------------------------------------------------------
Bridlewood Electromagnetic Fields (EMFs) Information Service
http://www.ncf.ca/bridlewood-emfinfo/
Archive provided courtesy of WaveGuide, http://www.wave-guide.org
Reprinted with permission of Roy Beavers, http://www.emfguru.com