ZXC10 BTSB I28A Installation Manual
13-8
3. The feeder between the tower top and the equipment room should be grounded
in at least three points. The first location is within 1m from the tower up to the
platform. The second is within 1m from the tower to the front of the outdoor
cabling rack. The third is within 1m between the feeder and the feeder window.
The grounding points should be bound firmly with proper waterproof measures.
Where a grounding kit is installed, the outer sheath of a feeder is removed
according to the kit size. When installing the grounding kit, pay attention to
waterproof measures. The terminal of the grounding kit connected with a ground
wire should face downward lest any rainwater should flow into the feeder along
the ground wire.
4. If a tower is above 60m and needs a longer feeder, another feeder grounding clip
should be placed in the middle of the tower.
5. If a feeder is off the tower and routed for above 20m at the building top or on the
cabling rack before going into the room, another grounding clip for lightning
protection should be put at the building top or on the cabling rack.
6. The terminals of the grounding clip of a feeder should be fixed on the steel plate
of a nearby tower.
7. The outdoor grounding copper bar employs a special reliable path to an
underground ground grid. The line width should be more than 50mm
2
.
Otherwise, users should lay connecting cables as soon as possible.
8. For a building without a tower, the antenna feeder ground at the top should be
connected with the nearby lightning protection ground grid on the roof.
9. If the feeder employs a downward cable ladder to go along walls downward
from the building top and enters a room, the cable ladder should be grounded.
10. The ground wire of a feeder should be led from up to down. The separation
angle between the feeder and ground wire should be no more than 15
º
.
11. The cabling of the feeders should be visually appealing without crisscrossing.
They should be well arranged and have no apparent twists and turns. The feeders
entering a room should be tidy, flat, and straight and in the bending of the cables
should be identical. The main feeders are correctly connected and the sectors
concerned are correct too.
