Specifications

Draper Prison Wasatch & Oquirrh Intercom & Paging System Remodel 4-21-2014
GROUNDING AND BONDING FOR COMMUNICATIONS SYSTEMS 270526 - 7
1. Install the conductors in grid pattern on 4-foot (1200-mm) centers, allowing bonding of
one pedestal from each access floor tile.
2. Bond the TGB of the equipment room to the reference grid at two or more locations.
3. Bond all conduits and piping entering the equipment room to the TGB at the perimeter of
the room.
M. Towers and Antennas:
1. Ground Ring: Buried at least 30 inches (760 mm) below grade and at least 24 inches (610
mm) from the base of the tower or mounting.
2. Bond each tower base and metallic frame of a dish to the ground ring, buried at least 18
inches (460 mm) below grade.
3. Bond the ground ring and antenna grounds to the equipment room TMGB or TGB, buried
at least 30 inches (760 mm) below grade.
4. Bond metallic fences within 6 feet (1.8 m) of towers and antennas to the ground ring,
buried at least 18 inches (460 mm) below grade.
5. Special Requirements for Roof-Mounted Towers:
a. Roof Ring: Meet requirements for the ground ring except the conductors shall
comply with requirements in Section 264113 "Lightning Protection for Structures."
b. Bond tower base footings steel, the TGB in the equipment room, and antenna
support guys to the roof ring.
c. Connect roof ring to the perimeter conductors of the lightning protection system.
6. Waveguides and Coaxial Cable:
a. Bond cable shields at the point of entry into the building to the TGB and to the
cable entrance plate, using No. 2 AWG bonding conductors.
b. Bond coaxial cable surge arrester to the ground or roof ring using bonding
conductor size recommended by surge-arrester manufacturer.
3.6 IDENTIFICATION
A. Labels shall be preprinted or computer-printed type.
1. Label TMGB(s) with "fs-TMGB," where "fs" is the telecommunications space identifier
for the space containing the TMGB.
2. Label TGB(s) with "fs-TGB," where "fs" is the telecommunications space identifier for
the space containing the TGB.
3. Label the BCT and each telecommunications backbone conductor at its attachment point:
"WARNING! TELECOMMUNICATIONS BONDING CONDUCTOR. DO NOT
REMOVE OR DISCONNECT!"
3.7 FIELD QUALITY CONTROL
A. Perform tests and inspections.
B. Tests and Inspections:
Bid DA14027DFCM
5/30/2014 2:08 PM p. 97