Ask The Trades - 12V or 230v Smokes

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Ask The Trades › DIY Forum › Alarms, Phones, Aerials, CCTV & Datacomms › 12V or 230v Smokes

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12V or 230v Smokes (Read 3276 times)

jenki GDPR opt-out	12V or 230v Smokes Oct 12^th, 2005, 4:38pm Just a question out of interest. Which is best when connected to an alarm panel. I'm wiring an extension, and have to fit smokes, and was wondering what peoples views were on the 12V option wired into the b/alarm panel, as opposed to the 230v option and relay?
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Lurch

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Re: 12V or 230v Smokes
Reply #1 - Oct 12^th, 2005, 5:13pm

I usually use the Texecom Exodus smokes wired directly to the alarm panel.

Don't think there is really much of a difference between either method, except that it's easier to wire 12V smokes into the panel than to wire the zone into the panel and wire mains to the device on another circuit and link it all up etc...

Only thing is, I'm not sure if wiring smokes off the alarm panel on 12V complies with the building regs.

If you are connecting the smokes to the panel, don't forget the tamper loop on the cable.

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jenki

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Re: 12V or 230v Smokes
Reply #2 - Oct 12^th, 2005, 9:56pm

[quote author=Lurch link=1129131481/0#1 date=1129133632]Only thing is, I'm not sure if wiring smokes off the alarm panel on 12V complies with the building regs. [/quote]
yeah - not sure on that myself - so I've gone for the 230v option and then wire the relay to the panel......
[quote author=Lurch link=1129131481/0#1 date=1129133632]If you are connecting the smokes to the panel, don't forget the tamper loop on the cable. [/quote] So to be cheeky -as this is the 1st time i'm going to wire the smokes to the panel - I assume that i use two cores for the zone then add another two cores into the tamper loop chain? - to be honest i didn't think about adding the smokes to the tamper loop Embarrassed

- I can see that when using 12V you would want this - so you knew there was a problem with the smokes (as there powered by the panel)........ ah ok penny dropping, if you add them to the loop then the alarm panel give's additonal warnings if the smokes are no longer connected. - Cheers Lurch... Thats two this week Wink

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Lurch

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Re: 12V or 230v Smokes
Reply #3 - Oct 12^th, 2005, 10:21pm

[quote author=jenki link=1129131481/0#2 date=1129150608]I assume that i use two cores for the zone then add another two cores into the tamper loop chain? - to be honest i didn't think about adding the smokes to the tamper loop Embarrassed

[/quote]
Well, main reason I put the tamper loop in is that it's part of BS4737.

I come to jobs all the time where people seem to think that if the device isn't a PIR then it doesn't need a tamper connection. IT DOES!! It's kind of likened to not connecting the earth in a circuit of pendants, everything works so everyones happy, until something happens.......

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Lectrician Administrator Trade Member Author Offline Ask The Trades Posts: 8814 Total Thanks: 109 For This Post: 0 Braunton, North Devon United Kingdom Gender: Trade: Electrician	Re: 12V or 230v Smokes Reply #4 - Oct 13^th, 2005, 8:20pm What abount internal speakers?? So many people don't bother with a tamper on these - Is that required?? I always loop the aux tamper to them.
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Lurch

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Re: 12V or 230v Smokes
Reply #5 - Oct 13^th, 2005, 9:05pm

[quote author=Lectrician link=1129131481/0#4 date=1129231215]What abount internal speakers?? So many people don't bother with a tamper on these - Is that required?? [/quote]

Yes, everything connected to the system should have at least the cable tampered.

If you had bits of it untampered someone could easily cut the cable to your sounders and no-one would be any the wiser when the system is going off.

The clue is in the question, 'tamper', that's what you don't want people to be doing to any parts of the system.

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jenki GDPR opt-out Total Thanks: 109 For This Post: 0	Re: 12V or 230v Smokes Reply #6 - Oct 14^th, 2005, 8:49am Just for clarification - I do put the tamper loop in for every protective device, contacts, pir's, sounders etc, just that when it came to the smokes, (as they are not really protective devices for security) - i just didn't think of them. but rest assured they will have the tamper loop now. cheers
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Ask The Trades › DIY Forum › Alarms, Phones, Aerials, CCTV & Datacomms › 12V or 230v Smokes