About to run some wiring, what cable/size is required for the detectors.
You could only do this if you feed them from a lighting circuit, otherwise 1.5mm^2 is required.It depends on the alarms you choose. For normal mains alarms 1.0mm² 2 core and earth between the consumer unit and first detector, then 1.0mm² 3 core and earth to all the other detectors. Don't forget to wire CO alarms as well if they are required. www.aico.co.uk has a huge amount of information on what detectors to use and where to fit them.
That is interesting, can you not go 1.0mm on 6A device? As that is exactly what you would be doing if you connected up to most domestic lighting circuits!You could only do this if you feed them from a lighting circuit, otherwise 1.5mm^2 is required.
You could only do this if you feed them from a lighting circuit, otherwise 1.5mm^2 is required.
Also, CO detectors if interlinked with smoke detection will require an alarm controller to indicate cause of alarm (smoke/CO).
That is interesting, can you not go 1.0mm on 6A device? As that is exactly what you would be doing if you connected up to most domestic lighting circuits!
Well 3A mcbs are not a common device, so not an issue or concern for me. I have in the past installed smokes with 1.5mm, but that was because I had reels of it at the time, other than that I am not aware of any regulation stating smoke alarms circuit are not allowed on 1.00mm. I have done plenty of EICR/PIR on housing assoc. properties and never flagged up a 1.00mm circuit and never been told to!I never saw sense in it, we used to put the alarms on 3A MCBs when we used MK boards. I've never seen domestic smoke alarms installed with 1.5.
As far as I am aware, if the cable can deal with deratings and the rating of the protective device? It is fine, but I shall wait on that one.It was a big thing a while ago and there were arguments with people insisting that bathroom fans needed to be wired with 1.5mm² as they wern't lights, the same with central heating controls.
I am sure it will be interesting bedtime reading?I can't find the regulation in the book, though I havn't looked very hard.
Nothing wrong with fans or smoke detectors being wired in 1mm^2 if they are connected to a lighting circuit.It was a big thing a while ago and there were arguments with people insisting that bathroom fans needed to be wired with 1.5mm² as they wern't lights, the same with central heating controls. I can't find the regulation in the book, though I havn't looked very hard.
The relevant parts are:What does table 52.3 actually say?
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