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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

To maintain the integrity of a Class A circuit, how must the 'outgoing' and 'return' conductors be installed?

S524 Section 16 mandates that the outgoing and return conductors of a Class A circuit be separated by a physical distance or a fire-rated assembly to prevent a

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Question: To maintain the integrity of a Class A circuit, how must the 'outgoing' and 'return' conductors be installed?

Answer options:

  • In the same conduit at all times.
  • Only in PVC piping.
  • Using different wire colors. ✅ In separate raceways or separated by a fire-rated assembly.

Correct answer: In separate raceways or separated by a fire-rated assembly.

Explanation: S524 Section 16 mandates that the outgoing and return conductors of a Class A circuit be separated by a physical distance or a fire-rated assembly to prevent a single event (like a fire in a closet) from destroying both paths.

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