Appendix
MP1900X Series Router Installation Manual
D-2
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2019 Maipu, all rights reserved
S/N
Description
1
The router protection ground (PGND) shall be short-circuited nearby to 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.
D1.4 Grounding Specifications for Communication Power
The grounding specification of the communication power is as shown in the following
table.
Appendix Table D-3 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 communication
equipment, and when the communication power and communication
equipment are in the same room, they shall share the protection ground bar
in the same room.
