ZXC10-BTS (V5.4) Installation Manual
13-4
1. The power cables and ground wires in the equipment room should be laid in
accordance with engineering design requirements.
2. The PGND protective grounding wire on a BTS rack employs 35mm
2
yellowish
green or yellow copper-core cables and are connected with indoor PGND
grounding copper bars. They should be well contacted and kept firm.
GND/BGND ground wire employs 25mm
2
black copper-core cables and -48V
power cable employs 25mm
2
blue copper-core cables. Both ground wires and
power cables should be laid straight and well connected.
3. An earth bus should be directly connected with an indoor ground wire bus
instead of being connected with any other equipment. The line width of the earth
bus must be more than 50mm
2
.
4. Each grounding point in the grounding copper bar is connected with one piece
of equipment alone.
5. The protective grounding wire and AC neutral line are routed instead of being
placed or used together.
6. AC neutral line in the power room is independently grounded.
7. The indoor ground resistance is less than 5
Ω
.
8. Each cable is identified clearly and correctly.
9. The ground wire of a power cable, when laid, should be bound separately from
other cables.
10. The remaining length of the ground wire and power cable should be cut off
instead of coiling it up and reserving it.
11. The copper lugs on both terminals of power cables and ground wires should be
soldered or pressed firm.
12. The power cable and ground wire should be of whole material and no connector
is allowed in the middle.
13. The grounding bar should be insulated from walls and the ground wire extends
as short a distance as possible.
14. The primary power supply is correctly connected with the power supply
terminals on the rack.
