No. Description
2 The protective ground for the power supply and that for communication
equipment share the same grounding conductor. If the power supply and
the equipment are in the same equipment room, use the same
protective ground bar for them if possible.
3 Use a surge protection circuit on the AC power interface.
4 The positive of the -48 V DC power supply or negative pole of the 24 V
DC power supply should be grounded at the output of the DC power
supply.
5 The working ground and protective ground of the DC power supply
equipment should use the same grounding conductor with the protective
ground of the switching equipment. If the power supply and equipment
are in the same equipment room, use the same protection ground bar
for them if possible.
6 Add surge protection on the DC power interface.
4.1.12.3.5 Grounding Specications for Signal Cables
Table 4-37 lists the grounding specications for signal cables.
Table 4-37 Grounding specications for signal cables
No.
Description
1 Equip the cable outdoors with a metal jacket, well grounded at both
ends, or connect the ends of the metal jacket to the protective ground
bar of the equipment room. For cables inside the equipment room,
install surge protection devices at the interface to the equipment. The
PGND cable for the surge protection devices should be as short as
possible.
2 The incoming and outgoing signal cables to and from the oce and
unused wires inside the cable should be grounded for protection.
3 The Tone & Data Access (TDA) cable must pass through the Main
Distribution Frame (MDF) with surge protective device (SPD) when
going out of the oce. The cable's shield layer should be connected to
the protective ground of the MDF. The MDF should use the same
grounding conductor as the cabinet.
4 Do not route signal cables overhead.
4.1.12.3.6 Specications for Laying Out Grounding Cables
Table 4-38 shows the
specications for the ground cable.
HUAWEI NetEngine 8000 F
Hardware Guide 4 Hardware Installation and Parts Replacement
Issue 05 (2023-03-31) Copyright © Huawei Technologies Co., Ltd. 502
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