CFAA Fire Alarm Technician · Question
What is the result of a single open-circuit fault on a Class B notification appliance circuit?
Any device after the break on a Class B circuit will be disconnected from the control unit and fail to report or operate. CAN/ULC-S524.
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Question: What is the result of a single open-circuit fault on a Class B notification appliance circuit?
Answer options: ✅ Devices beyond the break will not work
- The entire circuit will still function
- Only the EOL resistor is bypassed
- The panel will short circuit
Correct answer: Devices beyond the break will not work
Explanation: Any device after the break on a Class B circuit will be disconnected from the control unit and fail to report or operate. CAN/ULC-S524.
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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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