Why are optical fiber cables not required to be listed for certain lengths?

Optical fiber cables are not required to be listed for certain lengths primarily because they have limited exposure to electric currents. Unlike copper wiring, optical fibers transmit data using light rather than electrical signals, which significantly reduces their association with fire hazards. This characteristic contributes to a lower risk profile, permitting the use of certain lengths without the need for the cables to be formally listed.

In environments where optical fiber cables are deployed, the absence of an electric current means there is less concern regarding electrical faults, overheating, or potential combustion. This allows regulatory bodies to set specific guidelines that do not necessitate rigorous listing requirements for the cables, essentially recognizing their unique properties and safety assurances inherent in their construction and function.