Huawei DBS3900 Installation Manual page 46

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RRU3249

Installation Guide

Cabling of PGND cables

Cabling of E1 cables

Cabling of fiber optic cables

Issue DraftA (2015-05-30)

After routing a DC power cable onto the platform on a tower, route it along the shortest

path to the rails surrounding the platform, and route it along the inside of the rails.

After routing a DC power cable close to the equipment on a tower, use clips to secure the

power cable onto a pole or the rails surrounding the platform. Ensure that there is no

excessively long distance between the equipment and the position where the power cable

is secured.

PGND cables for a base station must be connected to the same group of ground bars.

PGND cables must be buried in the ground or routed indoors.

The external conductor of the coaxial wire and the shield layer of the shielded cable must

have proper electrical contact with the metal surface of the equipment to which they are

connected.

PGND cables and signal cables must be installed separately. A certain distance must be

reserved between them to prevent interference from each other.

Switches or fuses must not be installed on the PGND cables.

Other devices must not be used for electrical connections of the PGND cables.

All the metal parts in the housing of the equipment must be reliably connected to the ground

terminal.

E1 cables must not cross power cables, PGND cables, or RF cables when laid out. If

transmission cables are laid out with power cables, PGND cables, or RF cables in parallel,

the spacing between them must be greater than 30 mm (1.18 in.).

E1 cables are lined up straight and bound neatly with cable ties.

Sufficient slack is provided for E1 cables at turns.

E1 cables must not be pressed by the door of the cabinet when routed, as shown in the

following figure.

Figure 7-4 E1 cables routed in the cabinet

At least three people are required for laying out fiber optic cables. The cabling activities

of fiber optic cables are allowed only when qualified personnel and communication

facilities are available.

Huawei Proprietary and Confidential

7 Installing RRU Cables

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