Fire alarm cables are permitted to be laid directly on top of suspended ceiling tiles.

Fire alarm cables are permitted to be laid directly on top of suspended ceiling tiles.

• A. True
• B. False
• C. Only with a fire rating
• D. Only in dry locations

Answer: (B)

The key idea is how fire alarm cables are placed when they’re in a ceiling plenum. The space above suspended ceiling tiles is part of the building’s air-handling plenum, and cables routed there must be protected and contained in approved paths (like cable trays or conduits) and use plenum-rated jacketed cable. Lying cables directly on top of the ceiling tiles isn’t allowed because the tiles aren’t designed to support or protect wiring, and the arrangement wouldn’t meet plenum installation requirements or fire/smoke control standards. So the statement is not permitted. Instead, run the fire alarm cables in an approved raceway or through the ceiling void with plenum-rated cable. Even if a fire-rated jacket or a dry-location claim might seem relevant, the main requirement is proper containment and plenum-rated cabling, not simply the environment being dry or the cable having a fire rating.

The key idea is how fire alarm cables are placed when they’re in a ceiling plenum. The space above suspended ceiling tiles is part of the building’s air-handling plenum, and cables routed there must be protected and contained in approved paths (like cable trays or conduits) and use plenum-rated jacketed cable. Lying cables directly on top of the ceiling tiles isn’t allowed because the tiles aren’t designed to support or protect wiring, and the arrangement wouldn’t meet plenum installation requirements or fire/smoke control standards.

So the statement is not permitted. Instead, run the fire alarm cables in an approved raceway or through the ceiling void with plenum-rated cable. Even if a fire-rated jacket or a dry-location claim might seem relevant, the main requirement is proper containment and plenum-rated cabling, not simply the environment being dry or the cable having a fire rating.