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cajetan259@yahoo.co.in
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Join Date: Jul 2009
Location: india
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smoke detectors

11/07/2009 1:17 AM

can anyone tell me the smoke detectors installed in the control room are connected in series or in parellel to the smoke detection panel

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Mr. Truman Brain
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#1

Re: smoke detectors

11/07/2009 2:11 AM

I would have thought they would be in parallel! If you consider that each one is just a switch, if they were in series, if one switch closes, the circuit would not change until all were closed! In parallel, if one switch closes it activates the circuit! But, saying that I would read the instructions that came with the detectors and use there installation guide!

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cajetan259@yahoo.co.in
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#3
In reply to #1

Re: smoke detectors

11/07/2009 11:28 AM

I would be obliged if u can exactly let me know , since i have a confusion still weather it is in series or in parellel , sum say it is series and sum say its parallel

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PWSlack
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#6
In reply to #3

Re: smoke detectors

11/09/2009 3:22 AM

Ignore them. What does the equipment manufacturer's installation manual say?

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josej
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#2

Re: smoke detectors

11/07/2009 2:26 AM

In Series , Coz Its an addressable system

Ref NFPA 72 For Details

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Jose
capblanc
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#4

Re: smoke detectors

11/08/2009 3:38 AM

RTFB! (Read the flippin' book)

They are smoke detectors, they are essential safety items, don't take a chance, check with the manufacturer.

If they are two wire devices they can only be in parrallel (as per Mr Truman)

If they are 3 wire I think you will find that the supply is parrallel and the switches are series. this allows monitoring of the alarm circuit with an EOL (end of line) resistor.

Chas

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naveen_menon
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#5

Re: smoke detectors

11/09/2009 12:48 AM

Depends on the manufacturer... which make is this

THough ussually they are in series.
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cajetan259@yahoo.co.in (1), capblanc (1), josej (1), Mr. Truman Brain (1), naveen_menon (1), PWSlack (1)

Previous in Forum: Request Tang gauging Details   Next in Forum: Pl inform which make suitable for this specification
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