Installation Manual
7. Appendix 72
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communication equipment, and when the communication power and
communication equipment are in the same room, they shall share the
protection ground bar in the same room.
The DC power shall be added the protection circuit against surge.
6.7.4. Laying Specifications of Signal Cable
The laying specifications of the signal cable are shown in the following table:
Appendix Table 7.3.6.2-1 The laying specifications of the signal cable
If the router has a digital relay line directly or indirectly connected to the
base station of the wireless communication router, the E1 lightning
arrester should be installed on the corresponding interface of the router.
The metal outer sheath cable should be adopted outdoors. Both sides of
the metal outer sheath should be grounded reliably and connected to
the protection ground bar in the equipment room. When the cable
enters indoors, a signal lightning arrester should be added to the
corresponding interface of the router with the PGND cable of the signal
lightning arrester as short as possible.
The outer conductor of the coaxial cable and both sides of the shielded
cable must be electrically well connected to the outside surface of the
metal enclosure of the connector router.
7.7.4. Laying Specifications of Ground Wires
The laying specifications of the ground wire are as shown in the following table.
Appendix Table 7.3.6.2-1 Laying specifications of ground wire
Ground lead should not be intertwined or parallel with the signal line.
Grounding cable cannot be led aerially, but should be buried in the earth
or routed indoor.
On the protection ground wire, prohibit installing the connectors;
prohibit installing the switch or fuse.
The protection ground wire should adopt the yellow and green plastic
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