In article ,
Laurie wrote:
Hi,

Do smoke alarms have to be:

A. wired from a separate wat in the consumer unit, and

IEE on site guide states that they can be supplied from a seperate
MCB/fuse which is not RCD protected, OR a regularly used lighting
circuit, which is also not RCD protected. The TLC (on-line electrical
suppliers) smoke alarm guide however states that only battery back-up
alarms can be connected to a light circuit, and non-battery back-up
larms have to have their own circuit.


B. limked together?

IEE guide says they are 'required' to be interlinked

Many thanks for your continued support!

The IEE giude states that they are required to have a battery backup.

Laurie

Incidentally, the screwfix mains optical smoke alarm (non-battery
back-up) are a different make to the mains ionisation alarms (battery
back-up) and the instructions state they are not compatible with other
brands!
Neil