Appendix D Equipment Grounding Specifications
The grounding resistance of a comprehensive communication building should be less than or equal to one ohm. The grounding resistance of an ordinary communication office should be
6 FAQs about Base station power cabinet grounding
What equipment should be grounded in a TR?
The server and supporting equipment (such as mobile base stations, switches, and power supplies) in the TR should be grounded. The protection ground (PGND) cables of the equipment in the communication office should be finally connected to the total ground bar.
Which PGND cable should be connected to a power box?
The protection ground terminal on the power box of a cabinet is used to ground the power box. The PGND cable that is led out from the protection ground terminal should be connected to the protection ground bar of the cabinet.
Which PGND cable should be connected to a cabinet?
The total ground terminal of a cabinet is used for the grounding of the entire cabinet. The PGND cable that is led out from the total protection ground terminal should be connected to the protection ground bar that is provided and used by the customer.
Can a box device be grounded without a protection ground bar?
If there is no protection ground bar in the TR, an AC-powered box device can be grounded by properly connecting the PE cable of its three-core cord to the PE end of the mains supply. See Figure 3-3. In this case, you need to check the electrical connectivity and reliability of grounding by using a multimeter after the installation.
Which PGND cables should be connected to the total ground bar?
The protection ground (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.
How to connect PGND & RTN cable?
Similarly, the RTN cable that is led out from the RTN power input terminal should be connected to the RTN ground terminal or ground bar. The PGND cable that is led out from the ground terminal of the device should be connected to the nearest protection ground terminal or ground bar that is provided and used by the customer.
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All communication devices and auxiliary devices (such as mobile base stations, transmission and switching devices, power supply devices) in the equipment room should be grounded for
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Grounding Requirements for the Server
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
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