What is the main function of a power fishing system in cable installation?

The main function of a power fishing system in cable installation is to blow or vacuum a string line. This system is essential for efficiently installing cables in conduit or raceways, particularly in situations where pulling cables by hand would be difficult or impractical. The process involves using air pressure to blow a string line through a conduit, allowing for the subsequent attachment and pulling of the actual cables. This method reduces friction, minimizes damage to the cables, and speeds up the installation process, making it a valuable tool in the field of limited-energy cabling.

In contrast, other choices do not accurately reflect the primary purpose of a power fishing system. Streamlining production pertains more to overall efficiency in manufacturing rather than cable installation techniques. Securing outdoor cables is related to protective measures but does not describe the function of a power fishing system. Similarly, providing electrical grounding is a separate electrical function that does not involve the mechanics of cable installation with a fishing system.