What's Grounding Requirements for the TR Building

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It is recommended that reinforced concrete be applied to the construction of the TR.

The TR should be equipped with surge protectors, such as lightning rods.

The surge protection grounding of the TR should share the same grounding body as the protection grounding of the TR.

The grounding resistance of the TR or communication office should not be greater than 10 ohms and should comply with local and national industry standards.

The grounding resistance should be measured periodically to ensure effective grounding.

Other related questions:
What's Grounding Requirements for the Server
The server and supporting equipment (such as mobile base stations, switches, and power supplies) in the TR should be grounded. The PGND cables of the equipment in the communication office should be finally connected to the total ground bar. PGND cables of the equipment in a line should be connected to the ground bar of the first cabinet. PGND cables of the equipment not in a line but in the same TR should be connected to the protection ground bar of the TR. The -48 V power cable that is led out from the -48 V power input terminal of the server should be connected to the -48 V bus bar of the power cabinet or power distribution cabinet that is provided and used by the customer. Similarly, the RTN cable that is led out from the RTN power input terminal should be connected to the RTN bus bar. The PGND cable that is led out from the total ground terminal of the server should be connected to the nearest protection ground bar that is provided and used by the customer. NOTE: If the server is powered by a power distribution cabinet, the PGND cable that is led out from the total ground terminal of the cabinet should be connected to the protection ground bar of the power distribution cabinet. If the server is powered by a power cabinet, the PGND cable that is led out from the total ground terminal of the cabinet should be connected to the nearest protection ground bar of the power cabinet or that of the TR.

What's Grounding Requirements for Maintenance Terminals
If an AC-powered maintenance terminal communicates with the monitored server only over an Ethernet port, the maintenance terminal can be grounded by connecting the PE cable in its three-core cord to the PE end of the mains supply. After grounding a maintenance terminal, use a multimeter to check the voltage or current at the connection between the maintenance terminal and the PE end of the AC power supply, ensuring a reliable electrical connection. If an AC-powered maintenance terminal communicates with the monitored DC-powered server over a non-Ethernet ports, for example, an RS232 port or RS422 port, the maintenance terminal should be grounded by connecting its PGND cable to any of the following ground devices: Protection ground bar of the TR Power distribution cabinet that supplies power to the server Protection ground bar in the cabinet provided by the customer To disconnect the grounding connection between the three-core cord and the mains supply, break the PE prong of the plug and then insert the plug into an AC socket. If the server monitored by an AC-powered maintenance terminal is powered by an AC power supply, the maintenance terminal can be grounded by connecting the PE cable in its three-core cord to the PE end of the mains supply. After grounding a maintenance terminal, use a multimeter to check the voltage or current at the connection between the maintenance terminal and the PE end of the AC power supply, ensuring a reliable electrical connection. If a maintenance terminal is powered by an uninterruptible power supply (UPS) or an inverter, the shell of the UPS or inverter should be directly connected to the protection ground bar of the TR or the power distribution cabinet. The maintenance terminal can be grounded by connecting the PE cable of the three-core cord of the UPS or inverter to the PE end of the mains supply. If the maintenance terminal is powered by a DC power supply, the shell of the maintenance terminal should be connected to the protection ground bar of the TR, the power distribution cabinet, or the cabinet provided by the customer, or be connected to the ground terminal of the server, over a PGND cable.

What's Grounding Requirements for Signal Cables
It is recommended that shielded cables or the cables with metal jackets be used as the signal cables that are led into or led out from an office. It is recommended that the cables with metal jackets be used as the power cables that are led into or led out from an office or such power cables be routed through metal pipes. The shielded layer, metal jacket, or metal tube of a cable that is led into the TR must be connected to the nearest protection ground bar of the TR. Both ends of the shield layer of a shielded cable should have good electrical contact with the metal shell of the server they connect to. Grounding of the external conductors of coaxial cables to the digital distribution frame (DDF) should meet customer requirements. The DDF must be grounded. The DDF and the server in the same TR should share one protection ground bar. The incoming and outgoing signal cables to and from an office and the idle line pairs inside the cables should be grounded for protection. The metal reinforcing ribs of the incoming and outgoing signal cables to and from an office should be grounded to the optical distribution frame (ODF) or optical fiber box in the TR.

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