The distance between smoke detectors shall not exceed a nominal spacing of ____ feet?

The distance between smoke detectors shall not exceed a nominal spacing of ____ feet?

• A. 30
• B. 20
• C. 15
• D. 10

Answer: (A)

Spacing between smoke detectors is about ensuring quick detection and reliable coverage. Keeping detectors no more than 30 feet apart means that smoke has a short path to reach a detector from anywhere in the area, so the system can warn occupants promptly. If you let the distance grow larger, there’s a greater chance that smoke will accumulate in a space before a detector is activated, delaying notification. The other options propose tighter spacings, which would still work but are stricter than the standard maximum; the guideline specifies a maximum of 30 feet, making 30 feet the best answer.

Spacing between smoke detectors is about ensuring quick detection and reliable coverage. Keeping detectors no more than 30 feet apart means that smoke has a short path to reach a detector from anywhere in the area, so the system can warn occupants promptly. If you let the distance grow larger, there’s a greater chance that smoke will accumulate in a space before a detector is activated, delaying notification. The other options propose tighter spacings, which would still work but are stricter than the standard maximum; the guideline specifies a maximum of 30 feet, making 30 feet the best answer.