Smoke detector circuit.

[claire_r]

Hello all, long time no post.
Need some brains!
Silly new build with an interconn smoke at top of stairs and 2 horrible out of line pendants either side in hall.
Is there any reg that prevents me from moving that smoke detector over ever so slightly, it will still be just over the stairs, so I can put in one central light.
Ta lots

 

[telectrix]

no problem there. can you move it so as to still be central laterally so s/d and pendant are both central and in line?

 

[trev]

It depend on how close to walls etc it's going to be after it's moved

 

[telectrix]

since when did ice cream have a bearing on smoke detection?

 

[northernsparky]

no problem as long as you keep a 300mm distance between smoke and wall/lights

 

[tazz]

Little bit more to it than yes you can.......the detector covers 7.5m radius, so you limit on the area is 10m x 10m. so the detector must be positioned to cover the detection area fully. (rule of thumb..from the detector to each corner of the room is no more than 7.5m). Must be minimum of 300mm away from light fitting and 500mm away from a wall

 

[jlohm]

Little bit more to it than yes you can.......the detector covers 7.5m radius, so you limit on the area is 10m x 10m. so the detector must be positioned to cover the detection area fully. (rule of thumb..from the detector to each corner of the room is no more than 7.5m). Must be minimum of 300mm away from light fitting and 500mm away from a wall

And at an accessible position ( not over banister)

 

[telectrix]

over banister is OK. something to stand on.

 

[SirKit Breaker]

over banister is OK. something to stand on.

And something to fall off when replacing the battery!

 

[Simlec]

Little bit more to it than yes you can.......the detector covers 7.5m radius, so you limit on the area is 10m x 10m. so the detector must be positioned to cover the detection area fully. (rule of thumb..from the detector to each corner of the room is no more than 7.5m). Must be minimum of 300mm away from light fitting and 500mm away from a wall[/]

In domestic it's 300mm min distance from walls and light fittings.

 

[tazz]

Sorry your right, 300mm from walls....commercial part 1 in my head there

 

[driverman]

Sorry your right, 300mm from walls....commercial part 1 in my head there

I'm doing a new build, been told to install smokes detectors on landing which must not be more than 1m away from any bedroom doors. May be just a local requirement.

 

[Englishman]

And something to fall off when replacing the battery!

Get the Lithium battery back up detectors instead

 

[mole2006]

I thought they had to be mains powered on a new build.

 

[Englishman]

Words 5 and 6

 

[driverman]

I thought they had to be mains powered on a new build.

Yes your correct.......but with battery back up whilst power off for some reason ie power cut to property

 

[tazz]

Yes your correct.......but with battery back up whilst power off for some reason ie power cut to property

With over 80% of house fires being caused by electrical wiring or electrical equipment faults....the idea of battery backup on a grade D alarm is a very important one, when the power is first to go in a domestic fire.

 

[davesparks]

Blimey, statistics are great aren't they! I'm sure it was something like over half of all house fires being started by cigarettes on the last advertising campaign.

 

[DPG]

They always seem to say 'suspected electrical fault' if they don't know what the cause is. Or is that me being cynical? Daz

 

[tazz]

Think thats a fair point....80% is supposed 2008 statistics....but point was to why battery backup is important in domestic dwellings.

 

[UNG]

I'm doing a new build, been told to install smokes detectors on landing which must not be more than 1m away from any bedroom doors. May be just a local requirement.

That doesn't sound very practical on some domestics I've worked on you could have 3 or 4 detectors on one landing to comply with the 1 metre requirement

 

[driverman]

Blimey, statistics are great aren't they! I'm sure it was something like over half of all house fires being started by cigarettes on the last advertising campaign.

Cant remember where the house was.....But fire was suspected started by an exploding phone charger. On tv news they showed some experiments whereby under test cheap / copied imports do not met UK standards.

 

[davesparks]

Yeah cheap chinky phone charges and laptop chargers etc are pretty good at exploding and overheating, lots of people have done studies but nothing has happened to stop them yet,

Also some of them have clip on plug pins so you can change them to suit the country they are sold in, trouble is the pins part can be put in alive socket on their own and leave live metal available to touch. Or else the transformer part snaps off when you try to unplug it.

 

[UNG]

There has been cases where these plug in fragrance things have caused fires I make a point of telling people to turn them off when they go to bed or go out

 

[driverman]

Even today a fire problem........turned out to be an exploding ciggi charger.more common than you think!