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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

A design requires that a short circuit or open circuit on the addressable loop shall not result in the loss of any devices. Which DCL classification is required?

S524 Table 1 and Cl 3.102 defines DCLC as a loop that provides a redundant path. If one wire is severed, all devices remain operational. Zoning logic must still

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Question: A design requires that a short circuit or open circuit on the addressable loop shall not result in the loss of any devices. Which DCL classification is required?

Answer options:

  • Class B (DCLB) ✅ Class A (DCLC)
  • Class X
  • Class C

Correct answer: Class A (DCLC)

Explanation: S524 Table 1 and Cl 3.102 defines DCLC as a loop that provides a redundant path. If one wire is severed, all devices remain operational. Zoning logic must still adhere to floor limits.

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