CFAA Fire Alarm Technician · Question
What is the maximum allowable percentage of conduit fill for 4 fire alarm conductors (FAS 105) inside a 1/2" EMT conduit?
Clause 12-910 and Table 8 of the CEC define conduit fill. For three or more conductors, the maximum fill is 40% of the internal area.
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Question: What is the maximum allowable percentage of conduit fill for 4 fire alarm conductors (FAS 105) inside a 1/2" EMT conduit?
Answer options:
- 31% ✅ 40%
- 53%
- 60%
Correct answer: 40%
Explanation: Clause 12-910 and Table 8 of the CEC define conduit fill. For three or more conductors, the maximum fill is 40% of the internal area.
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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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