CFAA Fire Alarm Technician · Question
If a technician accidentally nicks a wire against a metal backbox during installation, what specific signal should the Fire Alarm Control Unit display?
Standard fire alarm panels use a ground-referenced power supply. When a field wire (positive or negative) touches a grounded conduit, it creates a path that the
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Question: If a technician accidentally nicks a wire against a metal backbox during installation, what specific signal should the Fire Alarm Control Unit display?
Answer options:
- AC Power Failure
- Open Circuit Fault
- Short Circuit Fault ✅ Ground Fault Trouble
Correct answer: Ground Fault Trouble
Explanation: Standard fire alarm panels use a ground-referenced power supply. When a field wire (positive or negative) touches a grounded conduit, it creates a path that the panel detects through its ground-fault detection circuit.
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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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