Jabba-the-Cat Posted April 18, 2009 Share Posted April 18, 2009 Is there any consensus about the use of screened cable for sensors and keypads? Is unscreened cable prone to generating false trigger errors near mains cables through interference? Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/ Share on other sites More sharing options...
DirectFS Posted April 18, 2009 Share Posted April 18, 2009 Is there any consensus about the use of screened cable for sensors and keypads? Is unscreened cable prone to generating false trigger errors near mains cables through interference? If its for the Galaxy you were showing in your other post, use screened Belden. Unscreened cable will cause data loss over a certain distance, as will untwisted. Bill. Bill Accord Fire & Security Services Ltd. www.accordfire.co.uk ~ TEL: 0845 474 5839 Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/#findComment-233904 Share on other sites More sharing options...
antinode Posted April 18, 2009 Share Posted April 18, 2009 It won't do any harm to use screened cable for detection circuits, however it's not required in most installations. Use of screened cables for data connections (ie between expanders and keypads) is specified by certain manufacturers. Some manufacturers say that using screened cables for network connections can impede performance on larger runs on their panels (can't remember who off the top of my head) In short, for detection circuits, it's down to you if you can justify the expense and general hassle in terminating it, go ahead. For data circuits follow the manufacturers recommendation. Trade Member Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/#findComment-233905 Share on other sites More sharing options...
Alarm Protection Posted April 18, 2009 Share Posted April 18, 2009 Use screened from panel to keypad and unscreened from panel to PIR's etc. I would use 8 core alarm cable as you have spare cores for the future. ! Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/#findComment-233906 Share on other sites More sharing options...
Jabba-the-Cat Posted April 18, 2009 Author Share Posted April 18, 2009 Thank you for the prompt reply to both queries. My cabling question was general and not specific to the Galaxy. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/#findComment-233910 Share on other sites More sharing options...
Guest RJBsec Posted April 18, 2009 Share Posted April 18, 2009 There is little difference in price, using screened cable throughout is IMO a good policy, (though possibly unnecessary), BUT be very careful not to cause a short on the foil by mis-clipping. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/#findComment-233911 Share on other sites More sharing options...
Jabba-the-Cat Posted April 18, 2009 Author Share Posted April 18, 2009 There is little difference in price, using screened cable throughout is IMO a good policy, (though possibly unnecessary), BUT be very careful not to cause a short on the foil by mis-clipping. Lol...as a former broadcast installer I can still handle a pair of lindstroms and a fanny stretcher. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/#findComment-233912 Share on other sites More sharing options...
ian.cant Posted April 18, 2009 Share Posted April 18, 2009 Screened cable or not screened cable isnt a matter of what you choose or prefer, follow the manufacturers recommendations and you cant go wrong! Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/#findComment-233917 Share on other sites More sharing options...
Lectrician Posted April 19, 2009 Share Posted April 19, 2009 And if you use a cable with more cores than you need, do not do as some first timers do and chop the spare cores off out of sight - When you come to use them in the future you then have an unnecessary challenge! Email : martin@askthetrades.co.uk Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/#findComment-233986 Share on other sites More sharing options...
Guest old-hand Posted April 19, 2009 Share Posted April 19, 2009 And if you use a cable with more cores than you need, do not do as some first timers do and chop the spare cores off out of sight - When you come to use them in the future you then have an unnecessary challenge! I hate those who cut back spare cores to make them think the install is neat! Link to comment https://www.thesecurityinstaller.co.uk/community/topic/28240-to-screen-or-not-to-screen/#findComment-233987 Share on other sites More sharing options...
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