Engineering Labels For Ac Power Cables; Engineering Labels For Devices - HP A8800 Installation Manual

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 cable 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 cables

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 cables are covered with insulating sheath, so the labels only need to contain "AC" and the
cabinet number. The labels for AC power cables are affixed to one side of the identification plates on
cable ties.
Table 59 Information on labels affixed to AC power cables
Content
MN-AC
The label only carries location information about the peer equipment and the power socket, while
information of the local end is not necessary. Make sure 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 must be in the same direction, as shown
in Figure 72.
Figure 72 Example of labels on an AC power cable
A01-AC (loaded cabinet side)—The power cable is connected to the socket of Row A and
•
Column 01 in the equipment room.
B01-AC (power socket side)—The power cable is connected to the loaded cabinet of Row B,
•
Column 01 in the equipment room.

Engineering labels for devices

These labels can be affixed to any device.
Meaning
MN: Rack number (row number and column number in the equipment room) or the
location of the socket where the power is led in.
The location of the socket is marked according to onsite situation. If the sockets can be
identified by row number and column number, they can be numbered following the
same rule for the rack number. Otherwise, specify the detailed locations to avoid
confusing with other sockets.
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