datadiffusion Posted July 12, 2019 Share Posted July 12, 2019 (edited) Certainly the Fike manual tells you to keep fire cables at least 20cm (IIRC) from any other electrical cable - and if you wanted to rely on BS7671, that also compels you to follow manufacturers instructions, so... As above, @Scotmod hasn't signed in for about 3 years, so better to start a new thread. And, welcome Edited July 12, 2019 by datadiffusion So, I've decided to take my work back underground.... to stop it falling into the wrong hands Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34297-do-fire-alarm-circuits-need-to-be-segregated-from-all-other-circuits/page/2/#findComment-486071 Share on other sites More sharing options...
al-yeti Posted July 12, 2019 Share Posted July 12, 2019 1 hour ago, datadiffusion said: Certainly the Fike manual tells you to keep fire cables at least 20cm (IIRC) from any other electrical cable - and if you wanted to rely on BS7671, that also compels you to follow manufacturers instructions, so... As above, @Scotmod hasn't signed in for about 3 years, so better to start a new thread. And, welcome You try keeping it away by 20cm in allot places very difficult Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34297-do-fire-alarm-circuits-need-to-be-segregated-from-all-other-circuits/page/2/#findComment-486075 Share on other sites More sharing options...
Shaunb1905 Posted July 12, 2019 Share Posted July 12, 2019 It’s seems daft to me when you think that the cables in the panel like the zone, loops, sounder circuits etc are close to the mains cable and connections Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34297-do-fire-alarm-circuits-need-to-be-segregated-from-all-other-circuits/page/2/#findComment-486083 Share on other sites More sharing options...
james.wilson Posted July 12, 2019 Author Share Posted July 12, 2019 but a very short length ie 50m vs 0.05m securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34297-do-fire-alarm-circuits-need-to-be-segregated-from-all-other-circuits/page/2/#findComment-486093 Share on other sites More sharing options...
sixwheeledbeast Posted July 12, 2019 Share Posted July 12, 2019 Inductance is measured over a conductors parallel length, this is why you may cross cables perpendicularly but they must have separation/segregation when parallel. 1 Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34297-do-fire-alarm-circuits-need-to-be-segregated-from-all-other-circuits/page/2/#findComment-486098 Share on other sites More sharing options...
Specialist Posted July 13, 2019 Share Posted July 13, 2019 21 hours ago, al-yeti said: You try keeping it away by 20cm in allot places very difficult Agreed, virtually impossible at times. Customers Love us, Intruders Hate us. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34297-do-fire-alarm-circuits-need-to-be-segregated-from-all-other-circuits/page/2/#findComment-486108 Share on other sites More sharing options...
Specialist Posted July 13, 2019 Share Posted July 13, 2019 11 hours ago, sixwheeledbeast said: Inductance is measured over a conductors parallel length, this is why you may cross cables perpendicularly but they must have separation/segregation when parallel. Customers Love us, Intruders Hate us. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34297-do-fire-alarm-circuits-need-to-be-segregated-from-all-other-circuits/page/2/#findComment-486109 Share on other sites More sharing options...
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