Confidential
Chapter 3 Connecting Cables
5G NR HRU Installation Manual v1.0
91
Copyright © 2018, All Rights Reserved.
Grounding
To comply with UL 60950, the equipment must be connected to a safety
grounding point via a permanent link. Grounding points are located on the product
for this purpose. Always connect the ground cable before fitting other cables. The
product must remain grounded continuously unless all connections to the power
supply and data network are all removed.
If equipment is grounded through a cabinet or rack, make sure it is done so
properly
Connect the ground cable first. In cabling, the connection of cables without the
connection to the ground cable may cause damage of the equipment or bodily
injury to personnel.
The purposes of the ground construction are as follows:
To prevent human life and the system from over-current, over-voltage, and
lightning.
To provide a discharge path for surge voltage generated by lightning and
power switch.
To protect the system from static electricity.
To eliminate or minimize the high-frequency potential in the system housing.
To provide a conductor for the balance and stability of high-frequency current.
To stabilize the potential of the circuit against the ground.
Connecting Ground Cable
To connect a ground cable, do the following:
Prerequisites
Before proceeding with connecting the ground cable, make sure that you have the
items mentioned in the table below:
Table 25.
Parts and Tools for Connecting Ground Cable
Category
Description
Installation Section
MGB-HRU Ground Terminal
Cable
6 AWG × 1C
Minimum Cable
bend Radius
8 × OD
Heat Shrink Tube
(Spec/Color/Length)
Ф 0.47 in. (12 mm)/Clear/1.96 in. (50 mm)
Pressure Terminal
MGB
Checking MGB specifications per site and preparing connecting parts
HRU
6 AWG, 2 Hole, Hole diameter: 1/4 in. (6.4 mm), Hole spacing: 0.63 in.
(16 mm)
Fastener
MGB
Checking MGB specifications per site and preparing connecting parts
