What is the primary purpose of rodding a duct?

The primary purpose of rodding a duct is to facilitate the installation of pull wire or pull line through the duct system efficiently. Rodding involves using a flexible rod to navigate through the duct, which helps in guiding the pull wire that will eventually be used to bring in the electrical or communication cables. This technique is crucial because it ensures that the installation process is smoother and reduces the risk of damaging the duct or the cables being installed.

While creating a new duct, cleaning the duct, or increasing cable capacity can be associated with duct work, they do not accurately capture the specific action of rodding. Rodding is primarily focused on the ability to direct a pull wire through existing ducts, making it a crucial step in the cable installation process.