Re: Bosch CCTV distance dilemna

["Bill" <billnomailnospamx@xxxxxxxxx>]

"Silicon Sam" wrote in message
>
>  My concern was the 24 gauge Cat 2 or 3 TP, when the Bosch calls
> for18Ga Shielded for the comm.  A lot of the other cameras in other
> buildings do use the correct cable, and they work fine.
>

Very good point! Over long distances, you get "voltage drop". And the
smaller the wire, the more the voltage drop! So the idea with longer
distances is to use a larger gauge wire. Search the internet for the
words...

voltage drop calculator

...and you can plug in a few numbers. See the results with different wire
sizes and distances.

Then shielding will make for a more clear signal. A long wire acts as an
antenna picking up all sorts of electrical "noise". Ground the shield at one
end only to prevent "ground loops". More on these here...

http://en.wikipedia.org/wiki/Faraday_cage

http://www.epanorama.net/documents/groundloop