Installation Manual
7. Appendix
70
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7.4.
Router Grounding Specifications and Protection
1.7.4.
Router Grounding Specifications
Grounding specifications include general grounding specification, grounding specification for
the building of equipment rooms, router grounding specification, communication power
grounding specification, signal cable grounding specification, and ground cable laying
specification.
2.7.4.
General Grounding Specifications
The general grounding specification is as shown in the following table.
Appendix Table 7.3.6.2-1 General grounding specifications
S/N
Description
1
The grounding design shall be done according to the voltage-sharing and
equipotential principle, i.e., the equipotential bonding mode in which
the working ground and protection ground (including shielded grounding
and distribution frame lightning protection and grounding) share a group
of ground body.
2
Protection ground shall be done for the metal parts of the router that
normally is not energized.
3
Ground cables shall be guaranteed to have good contact with the
protection ground bar in the equipment room.
4
Other equipment shall not be used as a component of electrical
connection of ground cables.
3.7.4.
Grounding Specifications for the Building
Specific requirements of the grounding specification for the building of equipment rooms:
The ground resistance of comprehensive communication buildings shall not be greater than
1Ω, and that of general telecommunication bureaus (stations) shall be less than 5Ω (or relaxed
to 10Ω in areas with high soil resistivity).
4.7.4.
Router Grounding Specifications
The router grounding specification is as shown in the following table.
Appendix Table 7.3.6.2-1 Router grounding specification
S/N
Description
1
The router protection ground (PGND) shall be short-circuited nearby to
