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NE40E V800R010C10SPC500 Installation Guide

This is NE40E V800R010C10SPC500 Installation Guide
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Grounding Specifications for Devices

Grounding Specifications for Devices

This section describes the specifications for devices.

Table 5-2 lists the grounding specifications for devices.

Table 5-2 Equipment grounding specifications

No.

Description

1

All communication devices and auxiliary devices (such as mobile base stations, transmission and switching devices, and power supply devices) in an equipment room should be grounded for protection. Connect the protection ground for various devices to the same ground busbar, and then to the same protection ground bar in the room together with the PGND of the devices.

2

The PGND of a device is shorted to the copper protection ground bar provided by the user. The short-circuiting cable used should have alternating yellow and green plastic insulating and a copper core, with cross-sectional area greater than 35 mm2 (0.05 in.2).

3

There are ground terminals and ground flags at the lower part of the front door, rear door, and side panel of a cabinet. The ground terminals must be connected to the ground terminals of the cabinet framework through connection cables with a cross-sectional area no less than 1.6 mm2 (0.002 in.2).

4

Ensure that all metal components of a cabinet have good conductibility. No insulating coating should be sprayed on the connections of metal components.

5

Connect cabinets in the same row closely by fastening captive screws and washers on the top of the cabinets. Do not spray coating into a rectangle area of 30 mm (1.18 in.) x 50 mm (1.97 in.) around the connection hole for a captive screw. Measures to prevent rust and corrosion must be taken for this area. Zinc electroplating with iridescent yellow chromate conversion coating should be applied to the washer and nut to ensure sufficient electric contact.

6

When combining cabinets of the same type, short-circuiting cables are required to connect the ground busbars (if any) for the cabinets. The cross-sectional area of the short-circuiting cable is 6 mm2 (0.009 in.2) and is less than 300 mm (11.81 in.) long. Connect the two ends of a short-circuiting cable to the ground busbar terminals of the neighboring cabinets and fix them firmly.

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Updated: 2019-01-03

Document ID: EDOC1100055059

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