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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Mains fire detectors. Building Regs vs manufacturer's recommendations
From the chaotic regions of the Cryptosphere, "Charles M Atkinson"
wrote on Mon, 14 Jul 2003 19:45:14 +0100: Which advice to follow? I guess BRK are more likely to be overspecifying to avoid liability (that's posh for covering their arses) whereas the Building Regs are more down to earth. The (Approved Documents to the) Building Regulations are (one way of achieving) the absolute minimum standard acceptable for health, safety and welfare. If a manufacturer recommends a higher standard, and whether you choose to follow that advice, that's down to them (and very commendable it is, too), and to you. -- Hugo Nebula "You know, I'd rather see this on TV, Tones it down" - Laurie Anderson |
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Mains fire detectors. Building Regs vs manufacturer's recommendations
On Mon, 14 Jul 2003 19:45:14 +0100, "Charles M Atkinson"
wrote: Which advice to follow? If the fire has got to the stage where the interlink wiring is affected you have long since lost interest in the subject. -- Peter Parry. http://www.wpp.ltd.uk/ |
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Mains fire detectors. Building Regs vs manufacturer's recommendations
From the 2 statements as quoted I suspect the Regs mean you can use 3 core
+ earth (looks like twin and earth) rather than FP200 or Pyro. They don't appear to mention a size. BRK suggest 1.5mm probably because the interconnection will be low voltage (especially if the mains fail and you're relying on battery back-up) so you don't get a large volts drop over the length of the run. Richard. Thanks, Richard. I wouldn't have expected the voltage drops to be significant -- the currents will be in the signalling rather than power range???? |
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