Grounding Specifications For Signal Cables - Huawei AP8030DN Installation And Maintenance Manual

Huawei AP8030DN & AP8130DN
Hardware Installation and Maintenance Guide
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5.3.5 Grounding Specifications for Signal Cables

Grounding specifications for signal cables are shown in
Table 5-19 Grounding specifications for signal cables
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5.3.6 Specifications for Laying Out Grounding Cables
Table 5-20
Table 5-20 Specifications for laying out ground cables
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Issue 02 (2014-12-05)
Description
Use a surge protection circuit on the AC power interface.
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.
The working ground and protection ground of the DC power supply equipment should
use the same grounding conductor with the protection 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.
Add surge protection on the DC power interface.
Description
Equip the cable outdoors with a metal jacket, well grounded at both ends, or connect
the ends of the metal jacket to the protection 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.
The incoming and outgoing signal cables to and from the office and unused wires
inside the cable should be grounded for protection.
The Tone & Data Access (TDA) cable must pass through the Main Distribution
Frame (MDF) with surge protective device (SPD) when going out of the office. The
cable's shield layer should be connected to the protection ground of the MDF. The
MDF should use the same grounding conductor with the cabinet.
The signal cables should not be routed overhead.
shows the specifications for the ground cable.
Description
The grounding wire should not run parallel to or twist around the signal cable.
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Table 5-19.
5 Appendix
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