Motorola SC 4812ET RF Hardware Installation Manual page 173

Step
1 Ensure that all three (3) main DC breakers in the Power Cabinet are "OFF."
2 Route the DC conduit from the I/O area of the Power Cabinet to the I/O area of the RF Cabinet. See
Figure 5-1 for suggested location.
NOTE
This step is omitted if the DC conduit is already installed through the concrete pad.
3 Route the three (3) RED +27V feed power cables through the conduit and to the DC power connector
in each cabinet through the rubber boot (see Figure 5-6) in the floor of the I/O area.
NOTE
The rubber boot is sized to seal either a #2/0 AWG or #4/0 AWG power cable, if a different sized cable
is used other means may be required to ensure a good seal. A tie wrap or hose clamp must be used to
ensure a good seal around the cables at the boot.
4 Route the three (3) BLACK –27V feed power cables through the conduit and to the DC power
connector in each cabinet through the rubber boot (see Figure 5-6) in the floor of the I/O area.
NOTE
The rubber boot is sized to seal either a #2/0 AWG or #4/0 AWG power cable, if a different sized cable
is used other means may be required to ensure a good seal. A tie wrap or hose clamp must be used to
ensure a good seal around the cables at the boot.
5 At the RF Cabinet end of each DC power cable, strip insulation equal to the length of the crimping lug
barrel, plus an additional 5 mm (0.2").
! CAUTION
Route the cables through the rubber boot BEFORE crimping lug onto wire or damage to the boot can
occur.
6 Trim the top (tapered end) of the cable grommet to allow the grommet to slide over the cable. Ensure
that the grommet fits firmly around the cable.
7 Slide one cable grommet over each cable at the connector box.
Apr 2001
SC
TM
V0F.02
SC 4812ET to SC 4812ET DC Power Sharing
Installation Procedure
Do NOT wear a wrist strap when servicing the power
supplies or power distribution cabling. Serious personal
injury can result.
Before starting the procedure, ensure that the Power
Cabinet main DC breakers are turned "OFF".
Follow the procedure in Table F-3 to install the DC power cables (refer
to Figure F-1, Figure F-2 and Figure 5-1).
Table F-3: Procedure to Install DC Power Cables
4812ET RF and Power Cabinet Hardware Installation Manual
and Frame Installation
WARNING
CAUTION
Action
DRAFT
– continued
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173
F