Re: what is the best wire for a perimeter alarm

[Frank Olson <Use-the-email-links@xxxxxxxxxxxxxxxxxxxxxx>]

Bill wrote:
> If you want the *best* wire... In addition to what others said, note that
> all that wiring running in the walls/attic of a house acts as a big
> "antenna".
>
> The wiring can get voltage running in it induced by nearby radio
> transmitters, etc. and lightning strikes - causing false alarms sometimes.
>
> If you use "shielded" wire and ground one end of the shield (at the main
> box), this will keep the outside electrical interference out of the wiring.
>
> Shielded wire is like TV coax wire which has a metal wrap inside the jacket.
> But you can get regular 2, 4, [or whatever] conductor shielded wire. It is
> expensive though.
>
> More about this - Faraday Cage...
> http://en.wikipedia.org/wiki/Faraday_Cage


Next you'll be telling him to wire up his keypads with CAT 5E...
Shielded wire...  sheesh!  We've got alarm systems installed in homes
where the customer's are running ham radios.  I've not had a single
false alarm that's related to "radio interference".  About the only
"interference" I get these days is from young punks driving around with
bass speakers the size of garbage can lids playing something they call
"tunes" at a volume level that's gotta be close to 140 dB.  You can
actually *feel* them coming from a block away.  To top it off, when they
stop next to you they'll invariably be talking on their cell phones
although God knows how the heck the person on the other end can even
hear what they're saying.