S12800 Routing Switch Installa
tion Manual V1.0
Maipu Confidential & Proprietary Information
Page 126
E . 1 . 3 De v i c e G r o u n d i n g Sp e c i f i c a t i o n s
The device grounding specifications are as shown in appendix table E-2:
Appendix table E-2 Device grounding specifications
No.
Description
1
The communications devices and corollary equipment (mobile base station, transmission,
switching, power, and so on) in the equipment room should be connected to the earth for
protection. The protection groundings of the devices should be integrated to one total
grounding bar. The protection groundings of the devices in the same equipment room
should be integrated to the protection grounding bar of the same equipment room.
2
The protection ground (PGND) of the device should be connected to the nearest protection
grounding bar provided by the consumer. The short-circuit wire should be yellow and green
plastic insulated copper wire 2.5mm2 above.
3
There is the ground terminal and ground symbol below the front, back and side doors of
the cabinet, which should be connected to the ground terminals of the cabinet via the
connection cable with the cross-sectional area no less than 2.5mm2 respectively.
4
The metal components of the device cabinet should have good conductivity. The metal
component connections of the cabinet cannot be painted with the insulation paint.
5
The frame body of the same line cabinet is interconnected closely via the top fastening
bolts and washers. Do not spray at the 30mm*50mm rectangular surface around the
connection hole of the fastening bolts, but we should do the anti-rust and anti-corrosion
treatment. Washers and nuts should also be color zinc plated to ensure good electrical
contact.
6
When combining the cabinets of the same type, the ground bus bars of the neighboring
cabinets (if any) need to be interconnected via the bus bar short-circuit cable. The cross-
sectional area of the short-circuit cable is 6mm2 and the length is no more than 300mm.
Connect the two ends to the ground bus bar terminals of the neighboring cabinets
respectively and tighten.
E . 1 . 4 G r o u n d i n g S p e c i f i c a t i o n s of Co m m u n i c a t i o n P o w e r
The grounding specifications of the communication power are as shown in appendix table E-3:
Appendix table E-3 Grounding specifications of communication power
No.
Description
1
The AC power supply system of the communication equipment room should adopt the TN-S
power supply mode.
2
At the entrance of the AC power wire entering the equipment room, we should configure the
AC power mine (C-class mine) with the discharge current no less than 20KA.
3
The protection ground of the communications power should share one group of ground body
with the protection ground of the communication device. When the communication power
and the communication device are at the same equipment room, they should share the