157NOTE:• 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 abovelabel of “A01/B08--48V2”, “08” (or sometimes “8”) is the numeric identification of the terminal block.• PGND and BGND are two copper bars, on which the terminal blocks are short-circuited, thereforewhich terminal is connected makes no difference. It is only necessary to give the row and column of thepower distribution box, instead of giving the specific serial number of the terminal block on the copperbar. For example, if the label on the loaded cabinet side is “A01-BGND”, it means that the power cableis a BGND that connects BGND copper bar in the power distribution box on Row A, Column 01 in theequipment room. Information on the labels for PGND cables should be given in the similar way.Labels for AC power cablesThe labels are affixed to the AC cables that provide power for the cabinets, and the protection groundingcables, including the POWER, PGND, and BGND cables. The 220 VAC cables and related PGND andBGND cables are covered with insulating sheath, so the labels only need to contain the words of “AC”and the cabinet number. The labels for AC power cables are affixed to one side of the identificationplates on cable ties.Meaning of the labelTable 72 shows the information carried on the labels for the AC power cables.Table 72 Information on labels affixed to the AC power cablesContent MeaningMN-ACMN: Serial number of the cabinet or the socket where the power is led inThe location of the socket is marked out according to onsite situation. If the sockets can beidentified by row number and column number, they can be numbered following the samerule for the cabinets. If the sockets cannot be identified by rows and columns, specify thedetailed locations to avoid confusing with other sockets.The label only carries location information about the opposite equipment and the power socket, whileinformation of the local end is not necessary.Example of the labelMake sure that labels are affixed in correction direction. That is, after the cable ties are bundled onto thecable, the identification plates with the labels should face up, and the text on the labels in the samecabinet should be in the same direction, as shown in Figure 92:Figure 92 Example of the labels on the AC power cable
