Technical Requirements -
Telephone/Data Spaces & Cable Pathways
Entrance Conduits
Install a minimum of two, 4-inch conduits from the telephone company maintenance
hole to the Telephone Equipment Room. One of the conduits should be a spare.
Verify quantity with Telephone Company and Telephone Switch installation
Contractor (typically the Cabling Contractor). Coordinate all conduit entrance
locations with the VBA 20S4 Telecommunications Staff in Central Office.
Vertical Risers For Backbone Cabling
Primary vertical risers between T/D closets on adjacent floors shall be sized to meet
the requirements of the building. As a minimum, four 4" sleeves should be installed
in each riser, one should be a spare. For further guidance on the required number
of conduits/sleeves, consult with the Cabling Contractor through the RO IRM Staff or
COTR.
1. Conduit/sleeves entering T/D closets shall protrude no less than one (1) inch
above the floor or one (1) inch below the ceiling and shall not be installed to
prohibit the use of the entire backboard.
2. Conduit/sleeves shall be aligned to allow a straight and clear vertical pull of
cable.
3. Conduit/sleeves should be adjacent to a wall on which the cable can be
supported and should be installed in a manner that will not interfere with full use
of the backboard for termination equipment.
4. All conduit/sleeves located in T/D closets, and all firewall penetrations, shall be
sealed with standard UL approved, non-hardening duct seal compound to
prevent the entrance or exit of moisture and gasses and to meet the local fire
code requirements.
conduit/sleeves. Get approval of Project architect / structural engineer in writing
prior to drilling.
Page 4-18
VBA Design Guide
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