CFAA Fire Alarm Technician · Question
What is the standard resistance value for an End-of-Line resistor?
EOL values are determined by the manufacturer to match the supervisory current thresholds of the specific panel (Commonly 3.9k, 4.7k, or 10k Ohms).
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Question: What is the standard resistance value for an End-of-Line resistor?
Answer options:
- Always 4.7k Ohms
- Always 10k Ohms ✅ As specified by the control unit manufacturer
- As specified by the electrician's preference
Correct answer: As specified by the control unit manufacturer
Explanation: EOL values are determined by the manufacturer to match the supervisory current thresholds of the specific panel (Commonly 3.9k, 4.7k, or 10k Ohms).
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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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