Installation of fiber optic splice boxes in low-voltage wells

Fiber optic splice boxes in low-voltage wells must be installed with proper cable preparation, sealing, grounding, and organized fiber management to ensure reliability and minimal signal loss.Cable Preparation and Splice Closure SetupBefore installation, prepare the fiber optic cables by removing the outer jacket, shielding, and armor to expose the loose tubes, leaving sufficient length (typically 3 meters) for splicing and routing inside the closure . Clean and abrade the cable surface to ensure proper sealing and adhesion of sealing rings or tapes . For low-voltage wells, ensure the environment is clean and dry, and consider temporary waterproofing if the well is exposed to moisture .Mounting and Securing the Splice BoxFor wall-mounted splice boxes like the DIAMOND Future Box, position the unit at a height of 1.2–1.6 meters for accessibility during maintenance . In underground wells, ensure the closure is securely fixed to prevent movement and mechanical stress on the fibers . Use integrated cable strain relief systems to protect fibers from tensile forces, typically up to 500 Newtons . Ensure the closure is compatible with the number of fibers and allows for future expansion, leaving 20–50% capacity in splice trays .Sealing and GroundingInsert the prepared cable into the closure entry, using sealing rings and self-adhesive tape to create a watertight seal . Ground any metallic components or shield layers according to local electrical standards (e.g., DIN VDE 0100-540 for equipotential bonding) to prevent electrical hazards . For underground installations, verify the closure is airtight by testing with injected air pressure (e.g., 100 kPa ± 5 kPa) and observing for leaks over 24 hours .Fiber Management and SplicingInside the closure, organize fibers in splice trays with a minimum bend radius of 30 mm and sufficient slack (typically >1.6 m) to allow maintenance and re-splicing . Splice connections should be permanent, low-loss transitions (