Smoke Alarm Wiring

[sparer]

Hi,
I'm going to connect interconnected smoke alarms to the lighting circuits. I have both a ground and first floor lighting circuit. Can I connect smoke alarms to both circuits and interconnect with a single core or do I need to connect all alarms to only one circuit (either ground or first floor) and use 3 core and earth from one circuit My first thought is the latter but the former would be easier.

Thanks

 

[wingcoax]

If your up and down circuits are on different fuses you would have a problem. Use twin and earth 1.00mm from your supply (upstairs is probable easier) to the first detector and then three core and earth to link them.

 

[sparer]

Thanks for the advice wingcoax

 

[sparkwright]

If running a cable between the two detectors is a problem, use radio link bases. This way each detector only needs a feed from the nearest light (where permanent live and neutral are present).