Smoke detectors

[russellsmiler]

Can somebody advise me please

Am extending and knocking about my house and want to add mains smoke detection , I would like to put detector at GF hall /stairwell, FF lkanding, and in new extended kitchen, I believe from a Building control point of view I am only deemed to put Smoke detector in kitchen, but as i am deciding to put detectors in original house would they need to be linked, Now assuming they would and it is my desire to link them, can somebody tell me do i merely (first fix) run 3 core cable from kitchen detector as a daisy chain to Gf landing and terminate at FF landing.

Hope that clear and simple

Russell

 

[kbdiy]

I don't know about the regs but putting a smoke detector in a kitchen will cause no end of alarm triggers every time you fry or boil something. It'll be going off right in your ear!

Good luck with that

 

[cjard]

I think we could probably safely assume the guy meant a heat detector or one of the newer smoke detector technologies that wouldn't trigger every time toast was cooked

 

[kbdiy]

You might well be right ...... but on the other hand ......

 

[jeds]

First detector needs twin and earth supply - then daisy chain in three core and earth to all the others. I would advise a heat detector in the kitchen, optical in the hallway if it adjoins the kitchen and ionisation detector on each landing. Alternatively you could power each detector off of a light and interconnect with radio links.

 

[russellsmiler]

thankyou Jeds

This seems to be the answer

Thanks
Russell

 

[tew1]

You need to install a heat detector in the kitchen, NOT A SMOKE DETECTOR!!! then, in the hall, you need an optical smoke alarm (to minimise nuisance from kitchen), upstairs, you need an ionisation alarm, and a carbon monoxide alarm (if your bedrooms are upstairs), then other rooms (living/bedrooms), optical alarms. 2 core and earth from separate 6a RCBO to any one alarm, then daisy chained with 3core and earth from there to the rest. You can also install a reset switch with some manufacturers, which isolates the fault alarm without having to find a broom to push the button on the ceiling. Rechargeable (lithium) alarms do not require batteries to be changed, but often cost a lot more, and don't have any benefit other than changing the battery in 5 years or so. Models requiring a back box e.g. drywall box are often much lower profile, and look much less obtrusive, visually compared to surface mount ones, which are fairly chunky. Hope that helps.