Simple mains fire smoke alarm

[Des 56]

The cheapest option may end up being detectors with no battery back up
These then have to have a dedicated mcb so having to wire back to the consumer unit
I would make sure that whatever make you end up with.that there is battery back up allowing the use of a local lighting circuit ( which is my preferred method)
I dont think the difference in prices will make much difference for small quantities
If you were needing a couple of hundred then it may be worthwhile being price consious
BY the way Aico is my favourite

 

[Spudnik]

If we are going to split hairs, the OSG only says that there 'should' be a means of isolating without affecting the lighting and not 'must'.

It also states:

"Where all circuits are protected by RCD's there is advantage in supplying fire detection and alarms from regularly used lighting circuits."

So, in a nutshell, supplying from the lighting is fine IMO.

At least its better then no S.D.'s at all.

 

[mrloy99]

We wire them in 3core firecell cable or similar.Though I have also seen manufacters recommending flat3core+E. One advantage of the screened type of firecable is it can be used without an rcd. There are recommendations to their siteing.I think have to be 300mm min away from wall and same I think from light fitting ,eg fluorescent in kitchen.The present recommendation is that they should be on their own circuit. Also if your householder is wheelchair bound you might need one of those wall mounted reset jobbies.

edited

 

[detectorinspect]

Aico RadioLink Fire Alarm Systems are ideal for social or rented properties and is All devices on a RadioLINK System are connected via radio frequency