This guide walks through each stage of underground fiber installation—from route planning and conduit selection to splicing, termination, and testing—to help ensure long-term network performance and reliability. Protecting this. Fiber optic cable is sensitive to excessive pulling, bending, and crush forces. Whether you're setting up a network in your home or installing fiber optic cables for a large-scale project, one crucial factor to consider is the conduit. The conduit. Recommendations for Fiber Optic Cable Installation Where reels are supplied with protective material fitted over the cable, the protection should remain in place until the cable will be installed. During installation, all curvatures should be smooth.