Huawei AP7050DE Hardware Installation And Maintenance Manual page 103

AP7050DE
Hardware Installation and Maintenance Guide
Engineering Labels for DC Power Cables
These labels are affixed to the DC power cables that provide power supply for cabinets,
including the -48 V, PGND, and BGND cables. Here, the DC power cables also include power
cables and PGND cables.
The labels for DC power cables are affixed to one side of the identification plates on cable
ties. For details of the labels, see
Table 5-26 Contents of the label
Content
MN(BC)-
B--48Vn
MN(BC)-B-
BGND
MN(BC)-B-
PGND
The label only carries location information about the destination direction of the power cable
whereas information about the local end is unnecessary. That is, the label only carries location
information about the opposite equipment, the control cabinet, or the distribution box.
5-26
DC voltages, such as 24 V and 60 V should be given in similar methods.
Make sure that labels are affixed in the correct direction. That is, after the cable ties are
bundled onto the cable, the identification plates with the labels should face up, and the text on
the labels in the same cabinet should be in the same direction. For details, see
Figure 5-93 Example of the labels for DC power cables
Issue 01 (2016-04-15)
Meaning
MN(BC): BC is written right under MN.
B: chassis number, numbered in bottom-up order with two digits, for
example, 01.
N: power socket number, numbered as 1 to 3 in the bottom-up and left-
to-right orders.
On the loaded cabinet side, only MN is used to identify the cabinet.
On the power cabinet side, MN identifies the row and column number
of the power distribution equipment like a control cabinet and
distribution box, and BC identifies the row and column number of the
-48 V connector. If there is no row number or column number, or the
connector can be identified without them, BC can be omitted. It is
unnecessary to identify the row and column number for BGND and
PGND.
lists the information on two -48 V power supplies on the label. The information on other
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Table 5-26.
5 Appendix
Table
Figure 5-93.
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