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Intruder, Fire, CCTV, Emg Light, Access Control
Fire alarm upgrade
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<blockquote data-quote="Tom Fire" data-source="post: 479750" data-attributes="member: 31327"><p>Assuming that the building is less than 300sm it would be ok on a single zone, otherwise it would need to be more zones BS5839-1:2017 clause 13.2.1 c. </p><p></p><p>Wiring in 7 core cable Clause 12.2.2 b would stop this because a single cut in the cable may disable more than 2000sqm .b) A single short circuit or open circuit fault on an automatic fire detector circuit should neither disable protection within an area of more than 2 000 m2, nor on more than one floor of the building plus a maximum of five devices.</p><p></p><p>in my humble opinion you are carrying out major works and the system would need to comply fully with both 7671 and BS5839-1. Id agree with UNO if you have good fire cable in the sounder circuits extend that into a loop and install an addressable system.</p></blockquote><p></p>
[QUOTE="Tom Fire, post: 479750, member: 31327"] Assuming that the building is less than 300sm it would be ok on a single zone, otherwise it would need to be more zones BS5839-1:2017 clause 13.2.1 c. Wiring in 7 core cable Clause 12.2.2 b would stop this because a single cut in the cable may disable more than 2000sqm .b) A single short circuit or open circuit fault on an automatic fire detector circuit should neither disable protection within an area of more than 2 000 m2, nor on more than one floor of the building plus a maximum of five devices. in my humble opinion you are carrying out major works and the system would need to comply fully with both 7671 and BS5839-1. Id agree with UNO if you have good fire cable in the sounder circuits extend that into a loop and install an addressable system. [/QUOTE]
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