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Do you install fire alarm systems?

Chris Pearson
Bit of thread drift going on elsewhere, so I have started a new one.


"Do you install fire alarm systems?" - a question which is asked on insurance renewal, but what does it mean?


IMHO, there is a world of difference between providing a mains supply with third core for linking for a couple of smoke detectors and a heat detector in the kitchen on the one hand (i.e. the minimum grade D2 LD3); and a full on panel with separate detectors and sounder etc. (grade A LD2) in a large house. I consider myself perfectly capable of providing the former, but have never attempted the latter.


So where does the threshold lie? I'd be interested in views on certification too please.
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    Hopefully the fire alarm panel would recognise this as a fault and show such by a fault light and/or buzzer.

    But the panel will still need some fundamental means of recognising the fault - if both conductors are normally at the same constant voltage during normal (non-fire) conditions then it's going to be tricky to detect. Likewise open circuits on cables without end-of-line monitoring (traditionally only the sensor circuits had such monitoring, sounder circuits had to have fully protected cables).

       - Andy.
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    Hopefully the fire alarm panel would recognise this as a fault and show such by a fault light and/or buzzer.

    But the panel will still need some fundamental means of recognising the fault - if both conductors are normally at the same constant voltage during normal (non-fire) conditions then it's going to be tricky to detect. Likewise open circuits on cables without end-of-line monitoring (traditionally only the sensor circuits had such monitoring, sounder circuits had to have fully protected cables).

       - Andy.
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