Installation Manual
7. Appendix
71
www.qtech.ru
the protection grounding cooper bar provided by the user, with the
short-circuiting cable of the yellow/green plastic insulated copper
conducting wire above 35mm
2
.
2
If the router is installed in the cabinet, the metal parts of the router
cabinet must be guaranteed to have good conductivity, and the
connections of various metal parts of the cabinet are prohibited from
spraying insulation paint.
3
When cabinets of the same type are combined, the grounding busbars
(if any) of adjacent cabinets shall be interconnected via busbar short-
circuiting cable with cross-sectional area of 6mm
2
and length of not
more than 300mm. Both ends of such cable shall be separately
connected to the grounding busbar terminals of adjacent cabinets,
tightened and fixed.
5.7.4.
Grounding Specifications for Communication Power
The grounding specification of the communication power is as shown in the following table.
Appendix Table 7.3.6.2-1 Grounding specifications for communication power
S/N
Description
1
The AC power supply system of telecommunications rooms shall adopt
the TN-S power supply mode.
2
The entrance for the AC power cable to enter the room shall be
equipped with an AC surge protector (Class C) with nominal discharge
current of not less than 20KA.
3
The communication power protection ground shall share a group of
ground body with the communication equipment protection ground,
and when the communication power and communication equipment are
in the same room, they shall share the protection ground bar in the
same room.
4
The AC power port shall be added the lightning protection circuit.
5
The positive terminal of -48V DC power shall be grounded at the output
of the DC power.
6
The working ground and protection ground of DC power shall share a
same group of ground body with the protection ground of
