What is the recommended size of two of the innerducts when installing optical fiber in a conduit?

The recommended size of two innerducts when installing optical fiber in a conduit is typically around 38 mm (1.5 in). This size is advantageous because it strikes a balance between providing adequate space for the fibers while minimizing the risk of damage during installation and use. Larger innerducts can increase the risk of signal loss and other issues related to fiber management. The 1.5-inch size allows for efficient organization within the conduit, making it easier to add or replace fibers as needed without overcrowding, which could lead to kinking or stress on the cables.

Choosing the appropriate innerduct size is crucial for the long-term performance of the fiber network, as it helps maintain the integrity of the optical fibers and facilitates better airflow for cooling and moisture management. Ensuring that the innerducts used are of the right size minimizes installation challenges and operational issues in the future.