How to connect the main cable of the optical distribution box

To connect the main cable to an optical distribution box, you need to introduce the cable through the inlet, secure it with seals and grommets, prepare the fibers, and splice them to pigtails or adapters.

Step-by-Step Procedure

1. Prepare the Main Cable

• Select the appropriate cable seals and grommets based on the diameter of the main fiber optic cable ( ).
• Pass the main cable through the inlet port of the distribution box, usually the center port, and through the selected grommet to ensure a secure fit ( ).
• Use hose clamps or cable fixing devices to prevent the cable from moving or loosening inside the box ( ). 2. Strip and Expose Fibers
• Remove the outer sheath and protective layers of the main cable to expose the bare optical fibers ( ).
• Carefully handle the fibers to avoid bending beyond the minimum bend radius, which can cause signal loss ( ). 3. Secure the Fibers
• Use nylon tie-wraps or other securing devices to fix the fibers in place within the fiber tray or splice module ( ).
• Ensure that the fibers have enough slack to allow the front panel of the distribution box to be pulled out without tension ( ). 4. Splice or Connect to Pigtails
• Perform fusion splicing between the main cable fibers and pre-terminated pigtails according to standard optical fiber welding procedures ( ).
• Make sure the fiber ends are clean, free of impurities, and the splice is firm and bubble-free ( ).
• Insert the spliced fibers into the splice tray and secure them with the tray cover ( ). 5. Connect to Adapters or Splitters
• Route the pigtails to the corresponding adapters or splitters in the distribution box ( ).
• Insert each pigtail into the correct port, ensuring a one-to-one correspondence between fibers and adapters ( ).
• Use bend radius control clips to prevent excessive bending of the fibers ( ). 6. Final Checks
• Close the splice tray and lock the front cover properly with the main and side locks ( ).
• Perform a visual inspection and, if possible, a continuity test to verify signal integrity ( ).
• Label all connections for future reference and organize excess fiber with zip ties or Velcro straps ( ). Following these steps ensures a secure, organized, and reliable connection of the main cable in an optical distribution box, minimizing the risk of fiber damage and signal loss.