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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

If a fire alarm control unit (FACU) is replaced in an existing building, which standard mandates the Verification procedure?

CAN/ULC-S537 is required whenever a system is modified (unless minor per local AHJ) to ensure the system still functions as intended. Items within S536 cover ma

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Question: If a fire alarm control unit (FACU) is replaced in an existing building, which standard mandates the Verification procedure?

Answer options:

  • The original 1968 standard used in construction
  • NFPA 72 - Chapter 14 ✅ CAN/ULC-S537
  • ASTTBC Red Book 2021

Correct answer: CAN/ULC-S537

Explanation: CAN/ULC-S537 is required whenever a system is modified (unless minor per local AHJ) to ensure the system still functions as intended. Items within S536 cover maintenance, S537 covers verifying the modifications.

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