CFAA Fire Alarm Technician · Question
When installing Circuit Integrity (CI) cable to meet survivability requirements, which installation detail is critical for compliance?
ULC-S139 testing requires that CI cable be supported by specific metallic hardware (e.g., steel trapeze or clips) to ensure the cable doesn't collapse during a
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Question: When installing Circuit Integrity (CI) cable to meet survivability requirements, which installation detail is critical for compliance?
Answer options: ✅ Using metallic supports at specific intervals
- Using plastic zip-ties every 300 mm
- Painting the conduit red
- Running the cable in a plenum ceiling
Correct answer: Using metallic supports at specific intervals
Explanation: ULC-S139 testing requires that CI cable be supported by specific metallic hardware (e.g., steel trapeze or clips) to ensure the cable doesn't collapse during a fire.
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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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