High Density Polyethylene conduit larger than ____ shall not be used.

High Density Polyethylene (HDPE) conduit is commonly used for underground installations due to its resistance to corrosion and durability. However, there are limitations on the size of HDPE conduit to maintain effective performance and facilitate proper installation, as well as to adhere to industry standards. Specifically, HDPE conduit larger than 7 inches in diameter is discouraged because such large conduit sections can pose challenges in terms of handling, installation, and the management of pull lines and ducts.

Conduit of this size can also lead to complications in compliance with electrical codes and safety regulations. These challenges include potential bend radii issues, increased friction during cable pulling, and difficulties in sealing. Therefore, the stipulation that HDPE conduit larger than 7 inches should not be used ensures the conduit system remains manageable, practical, and compliant with installation practices.

Understanding these size limitations helps professionals ensure they are adhering to the best practices in electrical installations, which ultimately contributes to safe and effective electrical infrastructure.