Discuss Mains operated interconnected smoke alarm in the Electrical Forum area at ElectriciansForums.net

Lister1987

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Smoke alarms are not covered by an EICR, other than the mains feed.
Very much dependent on the Inspector. If you have working knowledge of 5839-6 then you can code it against 560.10, adding on relevant clauses in 5839-6 to bolster the inclusion in scope. BS7671 says in the early pages it is not exhaustive and can be supplemented by other standards, here is a perfect example of that in action.
 

Neptune

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I do plan to go through the suggested booklet but would really appreciate a few pointers on the below as I am pushed for time.


When slotting the trunking into the smoke detector, does some of the top and bottom section of the trunking disappear into the detectors base? I am trying to determine how neat my cut on the trunking needs to be.

- Secondly, when I am passing through walls (brick) as I go from the ceiling from one room to another, what are your recommendations on making this entry? I have an SDS drill but thought that it may not work right in the corner of the ceiling and wall.

- Thirdly, whilst the smoke detectors need to be daisy chained with the 3 core and earth cable, how do I install an Aico Fire Control Switch? Remote Control Alarm Switch 230v Mains - https://www.cef.co.uk/catalogue/products/1148678-remote-control-alarm-switch-230v-mains?gclid=16b5a446064114559754c4ddd79e91a2&gclsrc=3p.ds&msclkid=16b5a446064114559754c4ddd79e91a2

Is this just like another smoke detector in the sense that it should be included in the daisy chain i.e. one cable in and one out to the next detector?


Thanks in advance
 

Neptune

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Thanks guys. I’ve read the install doc but don’t see any guidance on the below.


When slotting the trunking into the smoke detector, does some of the top and bottom section of the trunking disappear into the detectors base? I am trying to determine how neat my cut on the trunking needs to be.

- Secondly, when I am passing through walls (brick) as I go from the ceiling from one room to another, what are your recommendations on making this entry? I have an SDS drill but thought that it may not work right in the corner of the ceiling and wall.

I would appreciate your advice on this please.
 

Mike Johnson

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Thanks for all the responses. I really appreciate it.
My Local Authority has expressly stated that I need mains powered and cable interconnected smoke alarms. they do not approve the wireless system.

Once, I have confirmed the presence of permanent live in the ceiling rose I will use the trunking and clips mentioned to complete this task.

I also thought there was a "heat resistant" type 3 core and earth cable. Perhaps I should use that for the interconnect?

Thanks again
Challenge the Local Authority and ask where in the Regulations it says that wireless interlinked systems are unacceptable, which council is this? if they insist ask for it in writing.

Radio links are acceptable by most all authorities, what they are probably saying is the power to the alarms are to be from the mains to charge the non replaceable batteries, in this case the alarms can be powered from any lighting rose or power within the ceiling without the need for trunking or drilling walls.
 

nicebutdim

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- Thirdly, whilst the smoke detectors need to be daisy chained with the 3 core and earth cable, how do I install an Aico Fire Control Switch? Remote Control Alarm Switch 230v Mains - https://www.cef.co.uk/catalogue/products/1148678-remote-control-alarm-switch-230v-mains?gclid=16b5a446064114559754c4ddd79e91a2&gclsrc=3p.ds&msclkid=16b5a446064114559754c4ddd79e91a2

Is this just like another smoke detector in the sense that it should be included in the daisy chain i.e. one cable in and one out to the next detector?

Yes - control switch fitted as though it were another head.
 

Neptune

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Challenge the Local Authority and ask where in the Regulations it says that wireless interlinked systems are unacceptable, which council is this? if they insist ask for it in writing.

Radio links are acceptable by most all authorities, what they are probably saying is the power to the alarms are to be from the mains to charge the non replaceable batteries, in this case the alarms can be powered from any lighting rose or power within the ceiling without the need for trunking or drilling walls.
I can query again but the lady from council was categoric. The interlink should be cables and not wireless.
 

littlespark

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Speak to someone else at the council (again, which council? Your county location)

I’ve had a recent customer, who on one hand was being told he needed a mains interconnected heat alarm in his kitchen and a carbon dioxide monitor in his bedroom...

And a sensible council official saying the kitchen wasn’t a recent change so didn’t need it.... and a carbon dioxide monitor in a 200 year old house with single glazed windows was totally pointless.

(carbon dioxide monitors being installed in new build passive homes where there is no ventilation. Different to carbon monoxide alarms)
 

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