On Thu, 21 May 2009 23:08:48 -0500, flipper wrote:

On Thu, 21 May 2009 17:04:58 -0700, Archimedes' Lever
wrote:

On Thu, 21 May 2009 19:43:22 -0400, "Martin Riddle"
wrote:



"Archimedes' Lever" wrote in message
...
On Thu, 21 May 2009 18:18:49 -0400, "Martin Riddle"
wrote:



"PeterD" wrote in message
om...
On 20 May 2009 11:38:46 -0400, DJ Delorie wrote:


PeterD writes:
AFAIK, both are exactly the same electrically, only the polarity
of
the wires (vis-a-vis color codes) is different. Were you to wire B
to
B or A to A it is straight through. Wire A to B then it is a
cross-over.

Actually, not at all. Swapping green and orange swap whole pairs,
not
swap wires within each pair.

I think the difference is in the number of twists per foot in the
green and orange pairs (orange has more). If the TPF match the blue
or brown pairs, you get more crosstalk, so using the correct pairs
may
result in less crosstalk.

No question we have to do a full analysis of all factors! bg

I'm going to be doing a 200+ ft run in a month or so to the new
garage, and will try both ways and see if one is more reliable than
the other (I've got four cables run, only need one of them...)

Here is a LCOM link that would help on lighting protection.
http://www.l-com.com/productfamily.aspx?id=6385

Cheers

Lighting protection?

Surge devices are not for "Lightning Protection" as a lightning
stroke
would indeed make it all the way into your product if it hit.

Surge protection devices are just that. Protection from surges, and
only then, up to a certain point.

OK show me a lighting arrestor for Cat6(5e).


That is what I said. I said that there is NO SUCH THING.

No you didn't. All you said is that "Surge protection devices" are not
"for Lightning Protection" but you did not address whether there is
some other device suitable "for Lightning Protection"


Inside your house? No, there isn't. If your house is struck, it can
cause damage to any device inside the home, depending on where it strikes
and how big it is.

I have seen it hit a barn's lightning rod and produce three nice ball
lightning phenomena at about 9 inches in diameter each. I have seen it
hit a roof of a two story and make a man standing on the back porch pull
a spasm leap several feet, and he was drunk.

That one killed our 1962 Zenith floor model that lasted all the way
until 73. So even tube type circuits are susceptible.

Those voltages can get wherever they want. It made it all the way down
here from all the way up there. There isn't anything down here that you
can use to isolate it, unless you have huge plastics casting facilities
that can do a mold a couple hundred feet tall.

All we do in the home is suppress surges.