----End
6.3 Installing a PGND Cable and Equi-potential Cable
The PGND cable is used to connect the PGND bolts on the cabinets to the PGND grounding
bars on site, ensuring that the cabinets are properly grounded. The equi-potential cable is used
to connect the PGND bolts on the cabinets, ensuring the equi-potential connections between the
cabinets.
Prerequisite
The tools, such as a Phillips screwdriver, a cable cutter, and a multi-purpose crimping tool, are
ready.
Context
l An equi-potential cables connects a upper cabinet and a lower cabinet.
l An equi-potential cable connects two lower cabinets.
l A PGND cable connects the cabinet under the APM30H to an external ground bar to ground
all cabinets.
Table 6-1 describes the specifications of the PGND cable and equi-potential cable.
Table 6-1 Specifications of the PGND cable and equi-potential cable
Cable Name
One End The Other End Remarks
PGND cable M6 OT terminal M6 OT terminal Yellow and green cable,
16 mm
2
Equi-potential
cable
M6 OT terminal M6 OT terminal Yellow and green cable,
16 mm
2
Procedure
Step 1 Prepare the PGND cable and equi-potential cable.
1. Prepare the cable of proper length based on the actual cable route.
2. Add OT terminals to both ends of the cable. For details, see Assembling the OT Terminal
and the Power Cable.
Step 2 Install a PGND cable and equi-potential cable.
1. Connect one end of the PGND cable to the ground bar on the inner side of the cabinet under
the APM30H, use a spring washer and a bolt to secure the OT terminal on the cable, and
then connect the other end to the external ground bar, as shown in Figure 6-36.
NOTE
When installing the PGND cable, keep the crimping tube of the OT terminal in the direction shown in
Figure 6-35.
DBS3900 (Ver.B)
Installation Guide
6 Outdoor Scenario with AC Power Supply (BBU Installed
in an APM30H)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
50
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