Guide For Grounding The Network Cabinet Of The Customer - Huawei SmartAX MA5800-X2 Quick Installation Manual

6 Installing the Service Subrack

6.3 Guide for Grounding the Network Cabinet of the Customer

TN-S power distribution system
L
N
PE
PGND
TN-S power distribution system
Power
cable
L N PE
TT power distribution system
L
N
PGND
TT power distribution system
Power cable
L N
MA5800-X2
L
ODF
N
AC lightning protection bar
PE
AC power distribution cabinet
• In the case of the TN-C-S and TN-S AC power
MDF
• Use the ground cable (the cross-sectional area of the
ODF
• Connect the grounding point of the reinforcing rib of the
L
N
PGND
MDF
ODF
MDF
Ground bar
distribution systems, it is recommended that you use
the PE wire of the AC power cable for the MDU
grounding connection. The prerequisite is that the PE
wire of the AC power cable for the corridor of the
building is already grounded properly.
ground cable must be greater than or equal to 6 mm
to connect the ground bar and all the internal devices,
and the ground bar to the network cabinet in an
equipotential manner through a metallic structure.
optical fiber to the ground bar through a ground cable,
or connect this grounding point to the network cabinet
in an equipotential manner through a metallic structure.
• When the PE line of the AC power cable in the building of
the corridor does not meet the grounding requirement, the
network cabinet must be grounded through an external
ground cable (PGND cable), ensure that the reinforcing rib
of the optical fiber is disconnected from the device.
• A power cable with 3-5 m must be used for decoupling
between the surge protector and the ONU power supply.
MA5800-X2
AC PDU
•
In the case of the TT power distribution system, it is recommended that an
external grounding device be adopted. For example, use the dedicated
grounding device of the building (such as the grounding flat steel sheet,
grounding stud, and ground bar) or the base steel bar of the reinforcement
concrete of the building, or deploy a new earth screen.
•
Use the ground cable (the cross-sectional area of the ground cable must
be greater than or equal to 6 mm
internal devices, and the ground bar to the network cabinet in an
equipotential manner through a metallic structure.
•
Connect the external ground cable (PGND cable) of the network cabinet
to the external grounding device. As specified by the national grounding
standard, the cross-sectional area of the external ground cable must be
greater than or equal to 16 mm
9
TN-C-S power distribution system
L
PGND
N
PE
MDF ODF
AC power distribution cabinet
2
) to connect the ground bar and all the
2
.
L
N
PE
2
)
Ground bar