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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

What is the requirement for electromagnetic locks on an exit door when the fire alarm signal is activated?

Mag-locks must unlock immediately upon a fire alarm signal. There is a specific requirement in NBCC 3.4.6.16 that locks must also release upon loss of power to

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Question: What is the requirement for electromagnetic locks on an exit door when the fire alarm signal is activated?

Answer options:

  • The lock must stay locked for 30 seconds (time delay)
  • The lock remains locked until the fire department arrives ✅ The lock must release immediately upon signal from the FACP
  • The lock is not permitted to be connected to the fire alarm system

Correct answer: The lock must release immediately upon signal from the FACP

Explanation: Mag-locks must unlock immediately upon a fire alarm signal. There is a specific requirement in NBCC 3.4.6.16 that locks must also release upon loss of power to the fire alarm control unit.

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