Cabling
The design of the structured cabling contains the following considerations:
- Space in the telecommunications closet is used and allocated for scalability.
- The telecommunications room can service dual roles to also house equipment if space is available.
- Backbone cabling – fiber or copper.
- Horizontal cabling to include ladder racking to support cables.
- Work area – layouts and design of workstations.
- Building entrance (if applicable)
Secure Storage
• Unshielded Twisted Pair (UTP) cable, Cat 5e/6 cable shall be either Plenum or PVC. Plenum is fire resistant but is easily crinkled. PVC; however, is not fire resistant. The preferred cable size shall be 24 AWG.
• Wiring is done to accommodate the highest anticipated data rate.
• The maximum horizontal cable length shall be no longer than 90 meters (295 feet). Twisted cable pairs shall be kept under ½ inch to maintain transmission characteristics.
• Twists shall be kept as close to the termination of the outlet as possible.
• The cable bend radius shall not be exceeded as bends and sharp angle can compromise performance.
• The cable shall not be run over florescent fixtures, ceiling tiles, or grids. At all times, the cable shall be run in a tidy and organized manner.
• The tension of 4-pair cable shall not exceed 25 pounds of force and shall not be pulled more tightly than eight times the cable diameter (a 2-inch bend radius).
• There shall be only direct runs of the horizontal cable. No splicing of any kind is acceptable.
• There shall be no sharing of cable for voice, data, video and/or CCTV applications.
• The size of conduit pipe to workstations shall be no smaller than ¾ inch.
Once appropriately labeled, voice and data terminations can share the same termination block (patch panel).
• A separate termination block for voice and data is done at the client’s request.
• Grounding and bonding of Tel-co racks are done as per industry standards established by the electrical code, TIA standard 607 and IEEE. proper grounding and bonding protect personnel and equipment from hazardous voltages and reduce the effects of electromagnetic interference (EMI) to and from the telecommunications network.
Workmanship
Components of the structured cabling system are installed in a neat and orderly manner consistent with the data installation practices. Wiring color codes are strictly uniformed; they are permanent and readable in accordance with the TIA/EIA-606 standard.