ASTTBC RFPT — Fire Alarm Systems (AL) · Question
What is a fundamental wiring difference between Class A and Class B circuits?
A Class A circuit does not use an EOL resistor because the 'return' to the panel provides the electrical continuity check. The panel sends a signal out both sid
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Question: What is a fundamental wiring difference between Class A and Class B circuits?
Answer options:
- Class A uses two EOL resistors. ✅ Class A returns to the control unit; Class B ends at an EOL resistor.
- Class B is more expensive than Class A.
- Class B can survive a wire break better than Class A.
Correct answer: Class A returns to the control unit; Class B ends at an EOL resistor.
Explanation: A Class A circuit does not use an EOL resistor because the 'return' to the panel provides the electrical continuity check. The panel sends a signal out both sides or monitors the loop return.
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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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