Engineering labels for ac power cords – H3C Technologies H3C S12500 Series Switches User Manual
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Table 66 Information on labels affixed to DC power cords
Content Meaning
MN(BC)-–48Vn
•
Loaded cabinet side—Only MN is used to identify the cabinet number (row number
and column number in the equipment room).
•
Power cabinet side—MN identifies the row and column number of the power
distribution equipment like the control cabinet and distribution box. BC identifies the
row and column number of the –48V connector (if there is no row number or column
number, or the connector can be identified without them, BC can be omitted). RTN and
PGND have no row and column number for identification.
•
n—Power port number in down-top and left-right order, in the range of 1 to 3.
MN(BC)-RTN
MN(BC)-PGND
The label only carries location information about the peer equipment, control cabinet, or distribution box,
while the information of the local end is not necessary.
lists the information of two –48V power
supplies on the label. The information for other DC voltages (such as 24V, 60V) should be given in similar
methods.
Make sure labels are affixed in the correct direction. 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, as shown in
.
Figure 98 Example of labels on a DC power cord
•
A01/B08––48V2 (loaded cabinet side)—The cable is –48V2 DC supply, which is from the 8
th
connecter on the second row of –48V bus bar in the cabinet on Row A, and Column 1 in the
equipment room.
•
B03––48V2 (distribution box side)—The cable is –48V2 DC supply, which is from the loaded
cabinet on Row B, Column 03 in the equipment room.
In the power distribution box (or the first power cabinet of a row in the transmission equipment room),
every terminal block on the –48V connector bar has a numeric identification. For example, in the above
label of "A01/B08--48V2", "08" (or sometimes "8") is the numeric identification of the terminal block.
PGND and RTN are two copper bars, on which the terminal blocks are short-circuited, so which terminal
is connected makes no difference. You only need to give the row and column numbers of the power
distribution box, instead of giving the specific serial number of the terminal block on the copper bar. For
example, if the label on the loaded cabinet side is "A01-RTN", it means that the power cord is an RTN
that connects RTN copper bar in the power distribution box on Row A, Column 01 in the equipment room.
Information on the labels for PGND cables should be given in the similar way.
Engineering labels for AC power cords
These labels are affixed to the AC cables that provide power for cabinets and protection grounding
cables, including POWER, RTN, and PGND cables. The 220 VAC cables and related PGND and RTN