ASTTBC RFPT — Fire Alarm Systems (AL) · Question
How is the wiring supervision (Class A or B) for an initiating circuit verified according to CAN/ULC-S537?
Wiring supervision must be confirmed by introducing a fault (open circuit, ground fault, or short circuit) at the most remote point of the circuit.
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Question: How is the wiring supervision (Class A or B) for an initiating circuit verified according to CAN/ULC-S537?
Answer options:
- Testing at the control panel terminals only
- Checking the EOL resistor value with a multimeter
- Visual inspection of wire gauge and insulation color ✅ Introduction of a fault condition at the most remote point of the circuit
Correct answer: Introduction of a fault condition at the most remote point of the circuit
Explanation: Wiring supervision must be confirmed by introducing a fault (open circuit, ground fault, or short circuit) at the most remote point of the circuit.
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Question explanations
- Which of the following constitutes a system 'deficiency' rather than a 'non-conformance' to current standards?
- When a deficiency is corrected, what specific information MUST be recorded in the log?
- Which of the following would be categorized as a 'Non-Conformance' to the Installation Standard (S524) in an i
- In the event of a deficiency that renders the fire alarm system inoperative, what is the mandatory reporting r
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