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Thread: Smoke Alarms

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    Default Smoke Alarms

    Hi guys

    Just after some information regarding installing smoke alarms now the legislation has changed.

    I look after a commercial premises that already has 240 volt hard wired smoke detectors. They are coming up to 10 years old, so the electrician has pointed out that they need replacing. He has asked me if I can just install ones that are connected to the alarm system and I've been trying to find some relevant info regarding this.

    From my understanding, security alarm smoke detectors can no longer be the only smoke detector in a premises. They can be used to supplement hard wired ones (by this I mean 240 volt), but only if the hard wired ones already meet, at least, the minimum requirement stated in the relevant legislation. In a domestic situation there is reference to linking them together, so that they all sound, but no mention of this outside of residential.

    Can someone please point me in the right direction of what is required, as far as the security industry is concerned.

    cheers

    Paul



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    I think rules vary state to state,

    My understanding is that only 240v Hard wired smoke detectors meet the requirement in domestic premises. You can change 240v detector bases to one with a relay output and link that to a security panel. Clipsal do them.
    Commercial can vary as to what is required, from needing to have Fire Panel system with smoke detectors.

    If there is 240v smoke detectors on site then I would suggest keeping it that way. Can add security smoke or relay bases if required.

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    Have a talk with some commercial fire safety system consultants /suppliers, they should be able to give you Standards reference or fire safety authority website to research.
    for a start...

    The company I worked for always installed dedicated fire detection equipment separate from other building systems.
    When you order detectors, confirm date of manufacture.



    For domestic smoke alarm install, 240V supply is not required...
    AS 3786-2014, section 55D states:

    -----------------------------------------------------
    Prescribed ways of powering smoke alarms—
    (a) hardwiring the smoke alarm to the domestic
    dwelling’s electricity supply; or
    (b) a battery that is—
    (i) built into the smoke alarm in a way that
    prevents the battery being removed;
    and
    (ii) manufactured to power the smoke
    alarm for at least 10 years without
    being recharged
    -----------------------------------------------------

    My dwellings 24V electricity supply (Solar charged battery) is compliant.

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    I think in WA 240v smokes only comply in domestic as a client could disable an security alarm (remove plug and disconnect battery) and the security system smokes would then be useless or if battery backed smokes would go flat at some point.

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    Thanks guys

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