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Visual Alarm Device ("VAD")

Visual Alarm Device ("VAD")

A Visual Alarm Device ("v.a.d." or VAD) is a type of alarm indicating device to warn occupants within or in the vicinity of a building of the occurrence of a fire or other emergency, so that they may take appropriate precautionary measures.

Australia has adopted a modified version of the international Standard ISO 7240 for the design, construction and operation of visual alarm devices, that has the designation AS ISO 7240.23:2014.

In simple terms, when an active alarm condition exists, the visual alarm device is activated and emits a white or red flashing light. The flash rate of a VAD is between 0.5 Hz and 2 Hz of between pulses with a light intensity of not less than 1 candela (cd) and not more than 500 candela.

    Disclaimer

    In preparing this definition, we have drawn from various sources including Legislation, Codes, Standards and industry information, research and knowledge.  Like the english language, these definitions may subtly change from time to time. As such these definitions are provided solely on the basis that users will be responsible for making their own assessment of the definition and and are advised to verify all relevant representations, statements and information.