CFAA Fire Alarm Technician · Question
According to the National Building Code of Canada, what is the minimum standby power duration required for a standard fire alarm system?
NBCC 3.2.4.7 requires the system to operate for 24 hours under supervisory conditions and then 5 minutes under full alarm load.
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Question: According to the National Building Code of Canada, what is the minimum standby power duration required for a standard fire alarm system?
Answer options:
- 12 hours standby / 2 minutes alarm
- 48 hours standby / 15 minutes alarm
- 24 hours standby / 30 minutes alarm ✅ 24 hours standby / 5 minutes alarm
Correct answer: 24 hours standby / 5 minutes alarm
Explanation: NBCC 3.2.4.7 requires the system to operate for 24 hours under supervisory conditions and then 5 minutes under full alarm load.
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Question explanations
- The primary power for a fire alarm system must be:
- If a 120VAC primary power circuit for a fire alarm control unit is consuming 60 Watts of power, what is the cu
- In a steady-state DC circuit, if the conductor length is doubled while maintaining voltage and wire gauge, wha
- A resistor is rated at 10 Watts at 24VDC. If the voltage drops to 20VDC, what is the new power dissipation?
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