smoke detectors

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cajetan259 Active Contributor Join Date: Jul 2009 Location: india Posts: 15	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 __________________ cajetan
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Mr. Truman Brain Guru Join Date: Mar 2007 Location: South-east corner of Spain 50 48 49.24N 2 28 27.70W Posts: 1508 Good Answers: 31	#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! __________________ “It's kind of fun to do the impossible.” Walt Disney
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cajetan259 Active Contributor Join Date: Jul 2009 Location: india Posts: 15	#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 __________________ cajetan
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#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? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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josej Power-User Join Date: Mar 2008 Location: Mumbai Posts: 250 Good Answers: 2	#2 Re: smoke detectors 11/07/2009 2:26 AM
	In Series , Coz Its an addressable system Ref NFPA 72 For Details Regards Jose
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capblanc Guru Join Date: Jul 2008 Location: Mallorca, Spain Posts: 567 Good Answers: 15	#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 __________________ En la casa del herrero, cuchillos de palo!
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naveen_menon Commentator Join Date: Oct 2007 Location: India Posts: 92 Good Answers: 2	#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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