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andy™

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Posts posted by andy™

  1. when you say ' the alarm immediately activates' do you mean actually sounds as in bellbox blaring and code needing entered, or most likely, as james said, a small noise which is the chime which just needs turned off... common issue, been called to that many times.... iirc, on that panel you press chime, press the number light thats lit to take it off then press either reset or chime again (cant remember which)

  2. texecom elite can be controlled via an app. it needs a cable between panel & RKP but everything else can be wired or wireless. i tend to use a mixture of wired where possible and wireless when not practical to wire

     

    for CCTV, probably best keep the system separate on continuous record, at least it would catch any activity before the alarm was triggered

  3. 1 hour ago, Marcous said:

    Ahh I see- you've circled with the blow out occurred- this is just an example of the kind of board set up, how it looks in the panel box. It's not my actual board. 

     

    its a bit confusing that you post a picture of something that you dont have? in the pic  highlighted its most likely been cooked by a faulty battery. did you also get a new battery to go with the control board?

     

    it will need programmed.should be fairly simple to do once you have the install manual for it and know what each zone is for

  4. along similar lines, my unit has a mixture of heat & smoke detectors all NC. during the day its a somewhat hostile environment (lots of dust, welding etc). i simply have an output from the alarm to trigger a 4 pole relay where each pole is linked to each NC on the detectors so if they detect smoke and open the contacts, they are still being closed by the relay. but this im my own building that is not open to public and doesnt require a fire alarm anyway so i dont have any fire alarm regs etc to worry about

  5. would only need a 3 or 5 a fuse if it was from a spur, but 5839 does state lighting circuit and not general power circuit

     

    if going wired / grade D, you would also need a cable to interlink them, unless you fit something link aico with radio bases and take a supply to each one from a nearby light (assuming there is a permanent live there)

  6. 2 minutes ago, Simlec said:

    Thats not to say it cant be done. Just out of interest what sounders would you use? and how?

     

    not really had much to do with them, never installed a grade C system (usually installed grade D) but have worked on a few of them (adding more detectors (alarm & smoke), fault finding etc). the wiring has always been either NC or EOL to the detector with a sounder on each floor. if i was to install one then it would probably be along a similar design

     

    its also been a while since ive actually read 5839, more so on the parts that dont apply to grade D. probably how i missed the monitoring on the sounder bit....

  7. sounders shouldnt be such an issue, sounder upstairs and downstairs should be loud enough to be heard at every point at an adequate level.

     

    Detection circuits easy to monitor With EOL. monitoring the sounder could be problematic, although im not aware of that being a requirement for a grade C

     

    agree on the battery, 72 hour requirement would need a lot more than a little 7ah, even if the system was dedicated to just the smoke detectors and how power requirement for PIR's etc

     

    chances of a wiring fault before a fire is detected is very slim. most wiring would be out of the immediate threat of any fire, at least to the point of the alarm would have detected a fire and alerted everyone in the property before it was compromised. you could however wire the detectors in FP if you wanted to (or if you're feeling very adventurous go for MICC)

     

  8. 12 minutes ago, MrHappy said:

    When you have a periodic inspection done on your domestic electrics the no. of smoke detectors are stated on the cert,

     

     

    if youre on about an electrical installation condition report to 7671, smoke detector numbers are not required (ive never seen any forms that even have space to write this either). 7671 does not cover the requirement for them to be there either, so if there is none then nothing will be noted. if they are there then and mains wiring / interlink would be I&T. if its a proper alarm system in FP etc then it would only be tested as far as the power supply to the panel

     

    for those who are so unhappy about having a smoke detector on an intruder alarm, why? i dont usually fit them, but wouldnt have any problem doing so. each system has its pro's and cons, but i cant really see any serious enough to justify not using that method

  9. 32 minutes ago, sixwheeledbeast said:

     

    Mr. H hits the nail on the head as usual, should really be mains interlinked.

     

    personal opinions of what should and shouldnt be done does not change the fact that 5839-6 includes smoke detectors connected to an intruder alarm which is grade C. this is also graded higher than that of mains interlinked at grade D.

     

     

  10. 27 minutes ago, Litch90 said:

    Ideally on a dedicated circuit and not a spur of another?

     

    grade D can be connected to their own dedicated circuit or a regularly used lighting circuit

     

    my preference is with the lights, more so because if there is a fault its usually noticed sooner and less likely to be ignored and left unfixed, but one drawback is its probably more likely to trip in the first place due to it being used for other purposes. considering both sides, id say overall risk of it being left unfixed is less if its on with the lights

    • Upvote 1
  11. not according to 5839-6

     

    Quote

    16.1 Commentary
    A fire detection and fire alarm system in which components are interconnected will
    not fulfil its functions unless these interconnections operate correctly. In most
    systems, the interconnections take the form of wiring, but other means, such as
    radio signals, may be used. Recommendations for radio-linked systems are given in
    Clause 21.
    In most single-family dwellings, any interconnections between components are not
    required to function for prolonged periods during a fire. Accordingly, the use of
    fire-resisting cables might not be necessary. However, wiring needs to be protected
    from exposure to mechanical damage, particularly if the wiring is unmonitored.

     

     

    16.4 Recommendations for wiring in Grade C systems
    The following recommendations are applicable.
    a) The electrical characteristics of the cables used in Grade C systems should be
    in accordance with the relevant recommendations of BS 7671. The cables
    should be suitable for the current and voltage of the circuits concerned.

     

    makes no mention of fire resistant cable. for grade A & B it does state fire resistant cable required

     

    then there is also this

     

    Quote

    Grade C systems can incorporate even simpler CIE, providing a source of power for
    either a number of smoke alarms (and, possibly, heat alarms) or a number of fire
    detectors, with a very basic form of control and indication. Such equipment can
    comprise, for example, equipment specifically intended to provide a central source
    of power and control for interconnected smoke alarms, or can, for example,
    comprise the CIE of an intruder alarm system or social alarm system, to which a
    number of fire detectors and fire alarm devices are connected. Facilities provided by
    the CIE in a Grade C system may also include some facilities that are, more typically,
    provided in the CIE of Grade A and Grade B systems, which will satisfy all
    recommendations in respect of CIE for Grade C systems.

     

     

    like it or not, thats what the regs say

     

    personally, i almost always fit grade D using Aico detectors

  12. 7 minutes ago, MrHappy said:

    Only a proper fire alarm or interlinked smokes met with building regs,

     

     

    smoke detectors connected to an intruder alarm does comply with grade C of 5839 (unless im reading it wrong). mains interlinked smoke detectors are grade D

     

    Quote

    Grade c: A system of fire detectors and alarm sounders (which may be combined in the form of smoke alarms) connected to a common power supply, compromising the normal mains and a standby supply, with central control equipment

     

    but one major issue is backup time, needs to be 72 hours so you will need an extra few batteries

     

    from 5839-6:2013

     

    Quote

    NOTE For intruder alarm systems, BS EN 50131-1 recommends a standby capacity of
    less than 72 h. Modifications to an intruder alarm system are, therefore, likely to be
    necessary if it is to incorporate a fire detection and alarm facility complying with the
    recommendations of this standard for a Grade C system.

     

  13. 17 minutes ago, Wburke said:

    I hope the money comments are not aimed at me. I have a safe fitted, along with CCTV covering every inch of my property so I do not know where the money comments have come from. I am in a position now to get a decent alarm, when I fitted the one from B&Q it was just after I had bought a house and a year before my wedding so money was very tight. I live in a relatively low crime area but do value my property and positions so want something good that will last. Any actual advice about decent alarms would be appreciated.

     

    we see stuff like that often

     

    I often get called to jobs where the electrics are neglected to the point of being dangerous and never been altered since installed in the 50/60's etc, but they dont want to spend any money on fixing anything. yet they will happily spend thousands on a new kitchen or bathroom

     

    ref the safe, if its a cheap one with a digital lock, you can usually open them without the code in a few seconds and leave no evidence...

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