Which installation locations are permitted for any listed optical fiber cable?

Which installation locations are permitted for any listed optical fiber cable?

• A. Any listed optical fiber cable may be installed in hazardous locations and in cable trays.
• B. Only in nonhazardous locations.
• C. Only inside enclosed conduits.
• D. Not allowed in cable trays.

Answer: (A)

The key idea is that what matters is the listing on the cable. A listed optical fiber cable has been tested and approved for the specific environments and installation methods it’s labeled for. If that listing allows use in hazardous locations and in cable trays, then the cable may be installed in those places under the conditions of the listing. That’s why this option is correct: it reflects the licensed environments the cable is permitted to occupy. The other ideas assume restrictions not supported by the listing—restricting to nonhazardous spaces, requiring placement only inside enclosed conduits, or forbidding cable trays. A listed cable could be approved for trays or hazardous locations, so those restrictions aren’t universally true. Always follow the exact environments and installation methods specified in the cable’s listing.

The key idea is that what matters is the listing on the cable. A listed optical fiber cable has been tested and approved for the specific environments and installation methods it’s labeled for. If that listing allows use in hazardous locations and in cable trays, then the cable may be installed in those places under the conditions of the listing. That’s why this option is correct: it reflects the licensed environments the cable is permitted to occupy.

The other ideas assume restrictions not supported by the listing—restricting to nonhazardous spaces, requiring placement only inside enclosed conduits, or forbidding cable trays. A listed cable could be approved for trays or hazardous locations, so those restrictions aren’t universally true. Always follow the exact environments and installation methods specified in the cable’s listing.