Inspection and Testing of Fire Alarm Systems ITFAS-Level-1 Passing Score

Ground-fault monitoring circuits are required on many fire alarm systems to detect when a wire has unintentionally contacted a grounded surface. During testing, the inspectorintentionally introduces a groundto verify that the panel can detect it.

NFPA 72 (2022), Section 10.17.1:

"Ground-fault conditions shall be annunciated in accordance with the requirements of this Code."

Testing method:

Thestandard functional testis tointentionally ground a circuit(typically using a known resistor) and verify the control panel indicates aground-fault supervisory signal.

Correct answer: D. Verify the ground-fault indication when circuits are grounded

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Whensite-specific software(such as logic for fire alarm control panels) is changed,100% of the devices affectedby that change must be tested to confirm correct operation. Also,10% of unaffected devicesmust be tested as a safeguard.

NFPA 72 (2022), Section 14.4.2.2.4:

“When system software is modified, 100% of the affected devices or functions and 10% of the nonaffected devices or functions shall be tested.”

This ensures that updates don’t unintentionally compromise unrelated areas of the system.

Correct answer: D. 100% of devices affected

Candela ratings arevisually confirmedduringinitial acceptance. Further inspection is requiredonly if a device malfunction occursor areacceptance testis performed.

NFPA 72 (2022), Section 18.5.5.7:

“The candela rating shall be verified at initial acceptance and when there is reason to believe the device is not operating properly.”

McCulloh transmitters are part of older fire alarm systems but are still maintained in some jurisdictions. Inspection focuses ongeneral condition,correct system status, andlocation verification.

NFPA 72 (2022), Table 14.3.1 — Inspection Frequencies:

UnderMcCulloh Transmitter:

“Inspect physical condition”

“Verify location”

“Confirm system normal condition”

“Distinct waterflow condition” refers to alarm testing and isnotpart of theinspectionphase.

Correct answers:

Physical condition

System normal condition

Verify location

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