Huawei OptiXaccess EA5801E - Page 16

Guide for Grounding the Network Cabinet of the Customer
• In the case of the TN-C-S and TN-S AC power 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.
• Use the ground cable (the cross-sectional area of the ground cable must be greater than
or equal to 6 mm
2
) 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.
• Connect the grounding point of the reinforcing rib of the 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.
PE
TN-S power distribution system
PGND
L
N
PE
L
N
• The network cabinet must be grounded through an external ground cable (PGND cable).
• 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
ONU power supply.
TN-C-S power distribution
system
PGND
N
PE
PE N
L
L
Power
cable
5 Installing the Equipment
 TN-S and TN-C-S power distribution system
EA5801E
MDF
ODF
Ground bar
AC lightning protection bar
AC power distribution cabinet
MDF
ODF
L PEN
13