In what scenarios can optical fiber cables be considered safe without listing?

Optical fiber cables can be considered safe without listing in scenarios that involve their length as a significant factor. When optical fiber cables are less than 30 feet long, they typically do not require a listing because they are often categorized as low-voltage cables. This is based on the understanding that shorter runs minimize potential issues related to electrical hazards or signal interference, making them inherently safer under certain conditions.

In contrast, indoor installation, wall entry, or sealed environments may involve additional safety standards and codes that dictate the need for specific listings or compliance based on different criteria, such as environmental factors and the type of installation being performed. Therefore, the length of less than 30 feet provides a clear and straightforward guideline for determining safety without the need for a listing.