Circuits and Pathways
Signal transmission requirements have changed extensively in the last few code cycles. How well do you know the requirements for circuits and pathways based on the 2022 edition of NFPA 72?
1. How many classes of pathways are there in NFPA 72?
Correct Answer: 7
2. Technologies that supervise the communication pathway by polling or continuous communication “handshaking” are classified as Class ______ pathways.
Correct Answer: C
3. A pathway shall be designated as Class ______ when it is not monitored for integrity.
Correct Answer: E
4. Which pathway class requires the use of isolation modules?
Correct Answer: X
5. Class ______ circuits using physical pathways shall be installed so the primary and redundant, or outgoing and return, conductors exiting from and returning to the control unit, respectively, are routed separately.
Correct Answer: A, N and X
6. How many classes of pathway survivability are described in NFPA 72?
Correct Answer: 5
7. Which chapter of NFPA 72 describes the requirements for circuits and pathways?
Correct Answer: 12
8. For systems employing relocation or partial evacuation in a building constructed with a fire resistance rating that is equal to or greater than 2 hours, the installation shall provide a pathway survivability of Level ______.
Correct Answer: 2 or 3
9. Shared Level ______ pathways shall use equipment dedicated to the life safety system.
Correct Answer: 3
10. A pathway shall be designated as Class ______ when it has fail-safe operation, where no fault is annunciated but the intended operation is performed in the event of a pathway failure.
Correct Answer: D
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