1. SUMMARY
    1. Telecommunications spaces will be referred as Building Entrance Facility (EF), Main Distribution Frame (MDF), Intermediate Distribution Frame (IDF), Data Center (DC).

  2. TELECOMMUNICATIONS BACKBOARDS
    1. Wall mounted termination block fields shall be mounted on A/C 4' x 8' x .75" void free plywood. The plywood shall be mounted vertically 12" above the finished floor. The plywood shall be painted with a minimum two coats of white fire retardant paint on all (6) sides. Mounting hardware shall also be painted white for cosmetic purposes.
       
  3. EQUIPMENT AND WIRING RACKS
    1. All racks and wire management shall be Ortronics as specified in project specifications and drawings. The equipment/wiring racks shall provide vertical and horizontal cable management on front and rear of each rack. Waterfall cable management shall be provided at the top of the rack for patch cords and for horizontal cables entering the rack channels for protection and to maintain proper bend radius and cable support. Racks and Vertical managers shall be white in color.

      1. Approved manufacturers are Ortronics Mighty MM20 Channel Rack, 16.25"D channel, 7'H, 45 RU, tapped #12-24. Ortronics P/N: OR-MM20716-W

    2. Racks shall be securely attached to the concrete floor using minimum 3/8" hardware or as required by local codes. Earthquake restrictions, requirements, and zoning codes shall be strictly followed.

    3. Maintain a minimum of 36-inch clearance from the walls to the front/rear of each rack’s vertical managers. When mounting equipment/cabling on vertical walls the equipment mounting depth will need consideration for maintaining 36” clearances for all front/rear of racks.

    4. Each dedicated equipment rack shall have (2) Power distribution units (PDU) installed. Tripp- lite p/n: RS-1215-20T. 

    5. All racks shall be grounded to the telecommunications ground bus bar in accordance with Section 2.9 of this document.
       

  4. VERTICAL WIRE MANAGERS FOR EQUIPMENT AND WIRING RACKS

    1. Each equipment rack shall have (4) vertical wire managers installed. Two located on the front of rack, two located on the rear. Ortronics P/N: OR-MM20VMS710-W.

      1. MM20 Vertical Manager with Cover, 10"W x 13.62"D for 7' MM20 racks.
       

  5. HORIZONTAL WIRE MANAGERS FOR EQUIPMENT AND WIRING RACKS 
    1. At the top and bottom, front of each equipment rack, install the following horizontal wire manager. Ortronics P/N OR-60400098.

  6. WIRE BASKET CABLE TRAY WITHIN COMMUNICATION ROOMS (EF/MDF/IDF) 

    1. 12 or 24 inches wide depending on specific project details and the amount of horizontal data ports served by the communication room, 4 inches deep, black and of steel construction.
      1. Cablofil P/N 105/300BL OR P/N 105/600BL
    2. Black basket cable tray shall be required in all communication rooms and shall not have a liner. Cable tray installed outside communication rooms will have a color determined by A/E to match building paint schemes and tray liners will be required.
    3. All trays will be grounded per local Electric Code requirements and ANSI/TIA/EIA-607.
    4. All trays shall be cut using the Cablofil tray cutter: COUPFIL or CUTYFIL. All cut cable tray will be filed to remove burrs and painted to match color.  All cutting, filing, and painting will be done outside of building.
  7. GROUNDING AND BONDING 

    1. The facility shall be equipped with a Telecommunications Bonding Backbone (TBB). This backbone shall be used to ground all telecommunications cable shields, equipment, racks, cabinets, raceways, and other associated hardware that has the potential to act as a current carrying conductor. The TBB shall be installed independent of the building's electrical and building ground and shall be designed in accordance with the recommendations contained in the ANSI/TIA/EIA-607 Telecommunications Bonding and Grounding Standard.
    2. The main entrance facility/equipment room in each building shall be equipped with a telecommunications main grounding busbar (TMGB). Each telecommunications room shall be provided with a telecommunications ground bus bar (TGB). The TMGB shall be connected to the building electrical entrance grounding facility. The intent of this system is to provide a grounding system that is equal in potential to the building electrical ground system. Therefore, ground loop current potential is minimized between telecommunications equipment and the electrical system to which it is attached.
    3. All racks, metallic backboards, cable sheaths, metallic strength members, splice cases, cable trays, etc. Entering or residing in the TR or ER shall be grounded to the respective TGB or TMGB using a minimum #6 AWG green stranded copper bonding conductor and compression connectors.
    4. All wires used for telecommunications grounding purposes shall be identified with a green insulation. Non-insulated wires shall be identified at each termination point with a wrap of green tape. All cables and busbars shall be identified and labeled in accordance with the System Documentation Section of this specification.
    5. Busbar shall be solid copper, 12.0 inches long x 4.0 inches wide, wall-mounted, with standoffs.
       
  8. FIRESTOP
    1. All Penetrations through fire-rated building structures (walls and floors) shall be sealed with an approved fire stop system approved by the local fire code. This requirement applies to through penetrations (complete penetration) and membrane penetrations (through one side of a hollow fire-rated structure). Any penetration item, i.e., riser slots and sleeves, cables, conduit, cable tray, and raceways, etc. shall be properly fire stopped.
Last Updated: 
02/12/2020