Underground Cables: Groundwater seeps into cracked jackets or poorly sealed splices, shorting out fibers and promoting mold growth (which clogs buffer tubes). Aerial Cables: Rainwater enters through damaged connectors or jacket tears, freezing in winter and expanding to crack. Fiber optic cables enable high-speed, long-distance data transfer, forming the backbone of modern communication. Yet, outdoors, they face temperature swings, moisture, UV exposure, rodents, and human interference. Protecting them is essential for long-term reliability. This guide covers how to. Following industry standards like FOA and OSP ensures solid reliability for a stable connection, even when battling temperature swings or moisture. While these cables are engineered for durability (with some rated to last 25+ years), they are not invulnerable. The charter of the FOA was to promote professionalism in fiber optics through education, certification, and. Besides the usual safety issues for all construction, generally covered under OSHA rules in the US (OSHA 10 and 30), fiber optics adds concerns for eye safety, chemicals, sparks from fusion splicing, disposal of fiber shards and more, covered in Part 1. If volume is <5m3 & is not deemed as polluted then.