OR Fire Alarm Installer study guide
OR Fire Alarm Installer · Work through your exam, one topic at a time.
The Oregon Fire Alarm Installer credential is a state-issued certification for people who install, alter, and service fire detection and alarm systems in Oregon. It is aimed at apprentices and journey-level technicians in the limited energy trade who want a recognized, legally usable qualification to work on life-safety signaling systems, and at employers who need documentation that their installers meet state requirements. The OR Fire Alarm Installer study guide has 8 sections and about 2,641 words.
01Fire Detection and Alarm System Fundamentals
This domain checks whether you understand how a fire alarm system is assembled and how it behaves when a circuit or device fails. Expect questions on signal types, conventional versus addressable architecture, circuit classes, and the sequence from initiation to notification.
331 words, about 2 min02Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)
NFPA 72 is the installation, inspection, testing, and maintenance standard: Chapter 7 documentation, Chapter 10 fundamentals, Chapter 12 circuits, Chapter 14 ITM, Chapter 17 initiating devices, and Chapter 18 notification. NFPA 70 (NEC) Article 760 governs fire alarm wiring and circuit installation.
332 words, about 2 min03Initiating Devices and Detection Circuits
Spot-type smoke detectors on a smooth ceiling are commonly spaced at 30 ft (9.1 m), with no point on the ceiling more than 15 ft (4.6 m) from a detector. Ceiling-height correction factors apply above 10 ft.
370 words, about 2 min04Notification Appliances and Circuits
NFPA 72 requires audible appliances to produce at least 15 dBA above the average ambient sound level, or 5 dBA above the maximum sound lasting at least 60 seconds, whichever is greater, measured 5 ft above the floor. In sleeping areas, the sound must reach at least 75 dBA at the pillow.
344 words, about 2 min05Control Units, Power Supplies, and Wiring
The fire alarm control unit (FACU) receives primary 120 VAC power from a dedicated branch circuit and secondary power from sealed lead-acid batteries. Remote power supplies and NAC extenders add capacity but must be supervised and listed for fire alarm use.
304 words, about 2 min06Circuit Design, Voltage Drop, and Battery Calculations
Use the loop length, not the one-way distance: Vd = I × R × 2L, where R is the conductor resistance per unit length. A common design limit is 10% drop on a NAC, but the controlling rule is that each appliance must receive at least its listed minimum operating voltage.
304 words, about 2 min07Installation, Inspection, Testing, and Maintenance
NFPA 72 Chapter 14 sets the frequencies. The control unit and batteries are inspected monthly and tested annually; initiating devices and notification appliances are functionally tested annually; smoke detector sensitivity is checked within one year of installation and every alternate year thereafter unless the detector has an approved automatic test feature.
331 words, about 2 min08Oregon Licensing, Permits, and Administrative Requirements
The Oregon Fire Code adopts the International Fire Code with state amendments and is administered by the Office of the State Fire Marshal (OSFM) and local fire authorities. Fire alarm installation, alteration, and addition require a permit and plan review before work begins.
325 words, about 2 min