Mains powered smoke alarms,

[carryoncamping]

I need to install a mains powered smoke alarm in my new extension.

Does it matter which circuit (e.g. lighting or socket ring main) it is powered from?

Thanks

 

[alpcon]

Mains smoke alarms should be on their own circuit with mcb and if more than one interconnected with 3 core and earth. Off the lighting circuit or any other circuit is not desirable. Go and buy a good quality mains smoke alarm and you will find the instructions are very comprehensive with respect to the correct unit - optical, heat or ionization - correct siting and the correct method for wiring.

You could try Screwfix and search for smoke alarms as sometimes they have the instructions in PDF format for you to download.

 

[Jim2287]

battery back up too

 

[DESL]

There's been a lot of debate on this site about which circuit to put smoke alarms on.

The consensus seemed to be put them on a lighting cct as they're less likely to be switched off and forgotten about.

 

[reggie perrin]

There's been a lot of debate on this site about which circuit to put smoke alarms on.

The consensus seemed to be put them on a lighting cct as they're less likely to be switched off and forgotten about.

Agree.

 

[carryoncamping]

There's been a lot of debate on this site about which circuit to put smoke alarms on.

The consensus seemed to be put them on a lighting cct as they're less likely to be switched off and forgotten about.

Thanks for all the replies. My father who's a retirered elecrician used to put them on the lighting circuit for exactly the reason above.

 

[DESL]

I used to put smokes on their own cct but after some geezer called breezer suggested the lighting cct I've done it that way.