LSF ?
RF Lighting said:Low smoke and fume
When it is in a fire the cable produces a low amount of smoke and fumes
Also there is LS0H, which is low smoke, zero halogen.
The firm I work for do quite abit of work in churches, so apperance and life expectancy of installation often overrules time taken.
Spark123 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
Spark123 said:I can't remember seeing red sheathed cables in anything but LS&F type or pryo (+ maybe the odd flex), do they make red pvc twin+earth??
Spark123 said:I can't remember seeing red sheathed cables in anything but LS&F type or pryo (+ maybe the odd flex), do they make red pvc twin+earth??
RF Lighting said:Spark123 said:I can't remember seeing red sheathed cables in anything but LS&F type or pryo (+ maybe the odd flex), do they make red pvc twin+earth??
I've seen red twin and earth but don't know if it was LSF or PVC.
Do domestic smokes have to be run in red cable?
TheGaffersSon said:We use FP, its a bit s***te though. You can strip it with your thumbnail, and you're forever getting earthfaults.
securespark said:TheGaffersSon said:We use FP, its a bit s***te though. You can strip it with your thumbnail, and you're forever getting earthfaults.
You're not terminating it correctly, then. I've never experienced earth faults with FP.
As for Pyro, it's ace. I'm an even older git (40) and grew up on 15th.
When I was an apprentice, I did a fire alarm refit where we incorporated a pyro circuit into the rest of the job (new pyro). When the Thorn guy came to comission it, there were two faults where detectors were showing the same address. He was convinced it was an address fault caused by us not punching the cards correctly, or a wiring fault. He was amazed when there proved to be no faults on the system whatsoever (apart from 2 dicky smoke detectors, that is)
I have also seen a 1930's pyro install still running strong today - fantastic!
Bet you can't say that of lead-sheathed cable or VIR......
TheGaffersSon said:RF Lighting said:TheGaffersSon said:Pyro is a right pain. I'm glad it's before my time.
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?
It does look better, but most companies are more bothered about the time consumption. Understandably.
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