smoke alarms??
- Thread starter jonny1
- Start date
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Domestic can be spurred off the lighting or sockets circuit using 2.5mm twin and earth. To link more than one SD, run twin and earth 2.5mm between them.
Gafferson, not true
They should be connected to a separate way in the CU (not RCD protected) or from a local, regularly used lighting circuit. That way you will know if the power trips.
You dont spur off a socket circuit.
The alarms should be interlinked with appropriate cable so if one detects smoke they all go off.
To do this you will need 3-core and earth. Thats phase, neutral and an alarm interlink conductor. For this application use 1.5mm² cable.
Alarms must have battery backup in addition to the mains power.
They should be connected to a separate way in the CU (not RCD protected) or from a local, regularly used lighting circuit. That way you will know if the power trips.
You dont spur off a socket circuit.
The alarms should be interlinked with appropriate cable so if one detects smoke they all go off.
To do this you will need 3-core and earth. Thats phase, neutral and an alarm interlink conductor. For this application use 1.5mm² cable.
Alarms must have battery backup in addition to the mains power.
??????TheGaffersSon said:
Smoke alarms can be run on their own circuit or from a local regularly used lighting circuit. They should not be RCD protected unless it is a TT supply. You will need a 2c+e to the first smoke alarm for the supply and then the rest of the interconnecting cables in 3c+e LS&F cables. All can be done in 1.5mm/1mm subject to circuit design.
Further info here Wiring matters
edit 1) inserted link
edit 2) added word or
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That's good to know, its what I was told, cheers lads.
I have never installed domestic. Only full fire alarm systems (24V) from a panel.
Edit: Type error
I have never installed domestic. Only full fire alarm systems (24V) from a panel.
Edit: Type error
Spark123 said:
Not when I install them
Yes that's it, low voltage detection - Apollo XP range normally.
Spark123 said:
Pyro? You old git!
We use FP, its a bit ****e though. You can strip it with your thumbnail, and you're forever getting earthfaults.
Do you do many?
I'm 28 years old you young g*t. lol, I served my time shortly before fp200 became widespread hence we had to do pyro. I don't do much installation work nowadays, I generally only really do maintenance/breakdown work.
Spark123 said:
Pyro is a right pain. I'm glad it's before my time.
TheGaffersSon said:
Yeah but its worth the effort.
You will not find a better cable than pyro. Providing it is installed correctly it will last indefinatly, and installed well it looks far neater than almost any other wiring style too.
Spark123, is it a reg to use LSF cable to link the smoke alarms, or just your prefered method?
No req to use LSF or anything in domestic smokes. Plain old PVC is fine.
RF Lighting said:
It does look better, but most companies are more bothered about the time consumption. Understandably.
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