What is the maximum nominal spacing for spot type smoke detectors on smooth ceilings?

What is the maximum nominal spacing for spot type smoke detectors on smooth ceilings?
A . 15 ft (4.6 m)
B . 20 ft (6.1 m)
C . 25 ft (7.6 m)
D . 30 ft (9.1 m)

View Answer

Answer: D

Explanation:

According to NFPA 72, National Fire Alarm and Signaling Code, the maximum nominal spacing for spot-type smoke detectors on smooth ceilings is 30 feet (9.1 meters). This spacing ensures adequate coverage for detecting smoke in large areas and complies with the performance criteria established in the standard to provide early warning of fire conditions.

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