Hard wiring smoke alarms from lighting circuit

[mogwai72]

I have a holiday let fitted with down lighters throughout - so no central ceiling pendants in any room.

We have smoke alarms in every room - the kitchen and hall hardwired and the others with 10 year lithium batteries but interlinked to the hard-wired versions via WiFi.

A fire risk assessment tells me that ALL alarms now need to be hard wired since a change in the law. I’ve had the spark out and he says it’s an enormous job and all the ceilings will need channels cutting in them to bring a live feed to each room.

Others suggest the live feed could come directly from the down lighters. Surely if this was the case, my spark would know!

Can anyone advise?

 

[Murdochcat]

Impossible for random internet people to give a conclusive answer but

If there is a neutral at the switch then it’s almost certainly tricky

If there is no neutral at the switch then it may be possible to add them as there will be a permanent live somewhere above the ceiling

 

[pete01]

Even if you can get a feed from the lights you'll still need a 3 core from detector to detector.

 

[mogwai72]

Even

Even if you can get a feed from the lights you'll still need a 3 core from detector to detector.

even though they are interconnected via wireless?

 

[pete01]

Even

even though they are interconnected via wireless?

Oh yes sorry ignore that