The NEC® requires that low-voltage and optical fiber cable be _____.

The requirement for low-voltage and optical fiber cables to be marked with an appropriate classification is crucial because it ensures compliance with safety standards and provides necessary information for installation and future maintenance. Marking helps identify the type of cable, its intended use, and the appropriate installation methods or environments. This classification contributes to the overall safety and reliability of the infrastructure, reducing the risk of misuse or misapplication of the cables in various scenarios. Compliance with this requirement is essential for ensuring proper handling and installation, thereby minimizing the chances of accidents or failures that could arise from using inappropriate cables in unsuitable applications.