Which classification is used for locations storing easily ignitable fibers?

Which classification is used for locations storing easily ignitable fibers?

• A. Class I, Division 1
• B. Class II, Division 1
• C. Class III, Division 2
• D. Class III, Division 1

Answer: (C)

Classifying locations with easily ignitable fibers falls under Class III. Division 2 is used for these areas when such fibers are not normally in the air during normal operations, but could become present under abnormal conditions. So, a storage area for fibers, where fibers aren’t typically airborne, is designated Class III, Division 2. If the fibers were routinely in the air as part of normal processing, that would be Class III, Division 1. The other classes don’t apply here: Class I covers flammable gases or vapors, and Class II covers combustible dust, not fibers.

Classifying locations with easily ignitable fibers falls under Class III. Division 2 is used for these areas when such fibers are not normally in the air during normal operations, but could become present under abnormal conditions. So, a storage area for fibers, where fibers aren’t typically airborne, is designated Class III, Division 2. If the fibers were routinely in the air as part of normal processing, that would be Class III, Division 1. The other classes don’t apply here: Class I covers flammable gases or vapors, and Class II covers combustible dust, not fibers.