CFAA Fire Alarm Technician · Question
What is the requirement for the wiring between a fire alarm relay and a fan motor starter if the relay is located 3 meters away?
Under S524, if the relay is within 900mm of the device and the wiring is in conduit, it is acceptable. If it is further away, the circuit must be supervised for
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Question: What is the requirement for the wiring between a fire alarm relay and a fan motor starter if the relay is located 3 meters away?
Answer options:
- It must be installed in a separate red box
- It must be monitored for a ground fault only ✅ It must be supervised for open/short circuits if it is further than 900mm from the device
- It must be powered by a separate circuit breaker
Correct answer: It must be supervised for open/short circuits if it is further than 900mm from the device
Explanation: Under S524, if the relay is within 900mm of the device and the wiring is in conduit, it is acceptable. If it is further away, the circuit must be supervised for integrity.
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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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