ASTTBC RFPT — Fire Alarm Systems (AL) · Question
What is the main disadvantage of using Class B wiring for notification appliance circuits (NACs)?
Class B wiring is generally discouraged for critical notification in high-rise buildings because a single fire-induced break at the start of the circuit would s
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Question: What is the main disadvantage of using Class B wiring for notification appliance circuits (NACs)?
Answer options:
- It is easier to verify. ✅ A single break prevents all devices 'past' the break from operating.
- It uses too much wire.
- It cannot be used for smoke detectors.
Correct answer: A single break prevents all devices 'past' the break from operating.
Explanation: Class B wiring is generally discouraged for critical notification in high-rise buildings because a single fire-induced break at the start of the circuit would silence all speakers on the floors above.
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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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