What is typically required for correctly identifying cables at proper intervals?

To correctly identify cables at proper intervals, the voltage rating is a key characteristic. This is because the voltage rating of a cable provides critical information about the maximum voltage the cable can safely handle without risk of failure or safety hazards. Proper identification ensures that the correct cable is used for the appropriate application, preventing electrical issues that could arise from exceeding the cable's voltage capacity.

The significance of voltage rating in the context of cable identification is essential for maintaining safety standards and compliance with regulations during highway construction projects. While other characteristics, such as fiber type or cable length, may assist in distinguishing between cables, they do not provide the critical safety information that voltage ratings do. Signal strength pertains to performance metrics rather than safe operational limits, making it less relevant for identification purposes in this context.