CFAA Fire Alarm Technician · Question
According to ULC-S524, what is the designation for a supervised path that communicates with addressable devices and includes a return to the control unit?
DCLB is the addressable equivalent of Class B (no return). DCLA is the addressable equivalent of Class A (with return). CAN/ULC-S524 §3.3.2.
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Question: According to ULC-S524, what is the designation for a supervised path that communicates with addressable devices and includes a return to the control unit?
Answer options:
- DCL Branch
- DCLC ✅ DCLA
- DCLX
Correct answer: DCLA
Explanation: DCLB is the addressable equivalent of Class B (no return). DCLA is the addressable equivalent of Class A (with return). CAN/ULC-S524 §3.3.2.
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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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