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CFAA Fire Alarm Technician · Question

During the verification of a networked fire alarm system, what is the expected result of a single ground fault on the Data Communication Link (DCL)?

Under S537, a single ground fault or wire break must be simulated during verification to ensure the network can still transmit signals (if DCLA/Style 7).

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Question: During the verification of a networked fire alarm system, what is the expected result of a single ground fault on the Data Communication Link (DCL)?

Answer options:

  • The system should automatically shut down to prevent damage ✅ The system must continue to communicate (if wired as Class A/DCLA) and report a trouble signal
  • The system should immediately trigger a full building evacuation
  • The fault should be ignored by the system to prevent nuisance alarms

Correct answer: The system must continue to communicate (if wired as Class A/DCLA) and report a trouble signal

Explanation: Under S537, a single ground fault or wire break must be simulated during verification to ensure the network can still transmit signals (if DCLA/Style 7).

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