Huawei NE05E Hardware Manual page 425

HUAWEI NE05E,NE08E
Hardware Guide
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Grounding Without Dedicated Grounding Environment
The equipment is generally installed in harsh environmental conditions. Even if in
the installation scenario without dedicated grounding environment, you also need
to ground the equipment properly if possible.
TN-C-S/TN-S AC Power System (N Wire and PE Wire Are Combined into One
Wire on the surge protection Bar or N Wire and PE Wire Are Provided
Separately)
It is recommended that you use the PE wire of the AC power cable to ground the
equipment. The prerequisite is that the PE wire of the AC power cable for the
corridor of the building is already grounded properly.
The PE wire of the AC power cable must be grounded. Otherwise, electrical
leakage may occur on the device and cause personnel injury.
Figure 4-7
Figure 4-7 Grounding connections of the TN-C-S AC power system
Issue 05 (2023-03-31)
device. Do not use the downlead of the lightning belt or lightning rod of the
building to ground the device.
If the building does not have installation environment with a dedicated
grounding system, it is recommended that you use the protective earthing
(PE) of the AC power distribution system of the building to ground the device.
If the building does not have any dedicated installation environment for
grounding devices or the PE of the AC power distribution system, construct a
new grounding system. It is recommended that you install the network
cabinet on a lower floor of the building to reduce the grounding cost.
Routing the aerial open wire into the network cabinet is prohibited. Use the
cable with metallic jacket and route the cable underground into the network
cabinet.
After the power supply enters the network cabinet, use a surge protection bar.
Connect all devices and metal parts in the network cabinet to the ground bar
in the network cabinet in an equipotential manner. Connect the ground bar in
the network cabinet to the external ground device by using a ground cable.
D ANGER
shows the grounding connections of the TN-C-S AC power system.
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4 Hardware Installation and Parts Replacement
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