Chapter
8
Installation
of Primary Antenna Feeder System
8-25
If the antenna feeder system is installed on a tower, lead the grounding cable
downward along the tower.
If the antenna feeder system is installed on the top of a building, lead the
grounding cable to the lightning protection net.
4) Before installing the grounding kit, wrap the waterproof adhesive tape around
the grounding cable near the grounding copper for sealing, as shown in Fig.
8.7-2.
Fig. 8.7
-
2 Schematic Diagram of Wrapping Waterproof Adhesive Tape Around the Grounding
Cable
5) Clamp the external conductor with the grounding copper and clip tightly.
6) Seal the joint between the grounding kit and the feeder cable as follows:
First wrap the waterproof adhesive tape and then the PVC tap around the joint.
Wrap the waterproof adhesive tape circularly from bottom upward, and then
from top downward, finally from bottom upward again. Note that the next circle
covers half of the previous circle.
7) Connect the grounding terminal of the grounding kit to the tower body or the
cabling rack on the top of the building (the cabling rack is connected to the
lightning protection net). Remove the paint and oxide at the junction within the
radius of 13mm and then coat the clean area with antioxidant cream. After the
connection, paint the area with antirust paint.
8) Before the primary feeder cable is led into the equipment room, connect the
grounding terminal of the grounding kit to the outdoor grounding busbar.
