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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

What component is required at the end of a Class B initiating circuit to provide supervision?

Class B circuits require an End-of-Line resistor to supervise the continuity of the wiring. A missing resistor or open wire causes a trouble signal.

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Question: What component is required at the end of a Class B initiating circuit to provide supervision?

Answer options:

  • Class A loop
  • Class X isolator ✅ End-of-Line (EOL) resistor
  • Normally closed contact shunt

Correct answer: End-of-Line (EOL) resistor

Explanation: Class B circuits require an End-of-Line resistor to supervise the continuity of the wiring. A missing resistor or open wire causes a trouble signal.

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