User's Manual

Grounding Specifications
106 TDC-0971-011 CCU 100 and Repeater 100 Installation Guide
Proprietary and Confidential
To install a coax ground kit to end of ice bridge
Install coax ground kits prior to the jumpers at or near the end of the coax ice bridge.
• At a pad site, connect the ground leads to a CGB that will be connected to the
equipment BGR with two No. 2 AWG BTCW.
• At a platform, connect the coax ground kits directly to the MGB if the site
configuration permits.
To attach a coax ground kit at GPS and WAN antenna
If the GPS and WAN antennas are mounted on the monopole or antenna support structure,
attach a coax ground kit to the coax as close as possible to the antenna and connected to a
small CGB.
1. Ground the stand-off pipe mount with one No. 2 AWG BTCW exothermically welded
to the mast and connected to the CGB with a two-hole lug.
2. Connect the CGB to the tower BGR with one run of No. 2 AWG BTCW properly
strapped or otherwise secured to the tower to prevent movement in high winds.
3. Ground the GPS and WAN coax at the bottom of the tower (described in this
procedure) and end of the ice bridge (described in this procedure).
4. If the GPS and WAN antennas are mast mounted near the equipment or ice bridge,
the coax ground kits must be installed and connected to the CGB at the end of the ice
bridge, the EGB, or the MGB, whichever is more practical and provides the shortest
and easiest path to ground.
5. Ground the GPS and WAN masts by one No. 2 AWG BTCW directly to the BGR,
ground bar, or to another piece of properly grounded steel.
To ground a coax ice bridge
1. At each end of the cable bridge, bond the steel supporting structure for the waveguide
bridge to the BGR with a No. 2 AWG BTCW conductor.
2. Bond the waveguide bridge/cable tray to the grounded support structure or BGR using
No. 2 AWG BTCW and exothermic welds at each end.
3. Bond each section of the waveguide bridge/cable tray together with plates of similar
metal or with No. 2 AWG BTCW or #2 AWG stranded insulated wire, bonding each
section together at each joint.
4. If buried coax runs from the antenna support structure are used rather than a coax
bridge, still install coax ground kits at the base of the antenna support structure and
just prior to the equipment jumpers.
5. Place the two runs of No. 2 AWG BTCW used to bond the tower and equipment
ground rings in the same trench as the coax.
Warning Be careful when installing the coax ground kits prior to equipment entry to
ensure that all ground leads use smooth, large bend radii as it will be very difficult to
ensure that the leads always travel downward.