Class 3 | NFPA 72 | Fire Alarm System Schematic Diagram Explained

NFPA 72
Illustration of Fire Alarm System Schematic diagram explained
In this video we shall discuss about importance of fire alarm system, types of wiring used such as Class A & Class B and also understand the riser diagram of fire alarm system.
NFPA 72 : Standard for Fire Alarm Systems
Class 1 | Overview Fire Alarm System
• Class 1 | NFPA 72 | Ov...
Class 2 | Fire Alarm System Basics
• Class 2 | NFPA 72 | Fi...
Class 3 | Fire Alarm System Schematic Diagram Explained
• Class 3 | NFPA 72 | Fi...
Class 4 | Heat Detector Spacing Requirements Part 1
• Class 4 | Heat Detecto...
Class 5 | Heat Detectors Spacing Requirements Part 2
• Class 5 | Heat Detecto...
Class 6 | Smoke Detector Spacing per NFPA 72
• Class 6 | Smoke Detect...
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[@Quirov]

Profound and expressed in simple terms Sir!!

[@irfancfps]

Thank you so much

[@Quirov]

Thanks!...very much appreciated!!

[@irfancfps]

Great. Thank you 😊

[@OlayinkaAkinfesola]

Fantastic explanation from Class 1 to 3. thank you for this. please can I have a clearer schematic diagram... it's really hard to read what's in there. I would really appreciate.

[@irfancfps]

Sure. Thank you. Will share by tomorrow

[@irfancfps]

Could u please send your email id, so that i can share

[@ibrahimn.j.4943]

Thanks Eng. Irfan!
A few questions, if you do not mind:
1/ are all addressable detectors loop a class A?
2/ cannot we have notification appliances on same loop with initiating appliances?
3/ is NAC considered a loop by itself?

[@irfancfps]

Hi. Thanks for asking the questions
1) Yes, All Addressable devices are designed using a loop configuration. They are call SLC circuts.
2) No. There is separate connection for Notification devices called NAC circuits
3) No need to considered NAC as a loop.
Please watch my video on "Fire alarm system basics" to know more on SLC, NAC and IDC circuits
Below is the link
ruclips.net/video/OmNFI0RtRP4/видео.html

[@ibrahimn.j.4943]

@@irfancfps Thanks Irfan for taking the time to respond to my questions.
2/ I have read that there is what’s called a mixed loop where it is possible to have initiating and notification appliances on same loop. Have you come across any?
Thanks for the efforts again. Will be there “a common troubleshooting approaches” episode (it is just a suggestion).