fire detection panels

[soulman]

i have been asked by a friend to install three extra smoke detectors on his new ceiling as he has installed a suspended ceiling he must have smokes above & below. Anyway the contractors who look after the fire detection equipment & panel have agreed if he installs the smokes and fp200 they will terminate & commission saving my friend over a grand. My question is do smokes wired into a main panel just go out as a standard radial. As a spark i was talking to has said that i must return to the panel as in a ring the panel is a notifier id 2000.

cheers for any help

 

[NozSpark]

Just wire them as a radial,

Just make sure you mark up the cables (in and out) as many sensors have to be wired the right way around

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and don't forget to use metal P clips (even in trunking)

 

[johninlondon1]

Fire alarm installations

This site may address some of your questions.

 

[soulman]

cheers for that. i couldn't see why i would have to return to the panel.

 

[SLIPSHOD & SLAPDASH]

Just wire them as a radial, Just make sure you mark up the cables (in and out) as many sensors have to be wired the right way around

---------- Post Auto-Merged at 00:42 ---------- Previous post was made at 00:41 ----------

and don't forget to use metal P clips (even in trunking)

This could be read wrongly by someone who is unfamiliar with fire alarms. If the new detectors will be on their own zone then a radial (2 cores) is ok. If the new stuff is to be connected to an existing zone at the panel then it does need to be in a loop , easiest way is using a 4 core cable. This is because the detection cables are monitored so you cant 'spur' off them

 

[Terry W]

looking at the advice given...... oh dear

this is an multi loop analogue addressable system, the cable goes out from the controls goes though all the devices on the loop & returns to the controls.

rather than running cables at a whim you need instruction from the fire protection company

 

[benji]

i can remember working at an M&S and the zones all came back to the panel, end of line resistors fitted in panel

 

[Terry W]

i can remember working at an M&S and the zones all came back to the panel, end of line resistors fitted in panel

not sure how this helps the OP, but thanks for sharing

 

[soulman]

thank you lads. appreciated

 

[Technician]

From my limited knowledge of these systems I understood that

the end of line resistor HAD to be at the end of the line.

 

[SLIPSHOD & SLAPDASH]

From my limited knowledge of these systems I understood thatthe end of line resistor HAD to be at the end of the line.

Correct, but as benji mentioned we have also had a few specifications where we have had to bring the end of circuits back to the panel so future engineers know where the end of line is & it can be easily tested. I also remember years ago an 'End of line' engraved blank plate with the EOL device in would be fitted next to a break glass in a convenient position, for the same reasons, but you never see that today.

 

[Technician]

That's registered Slipshod. Thanks.