Install and Connect MCC1 (Multicarrier) Cabinet
Task List: Connect DC Power and Ground
344
SI Installation and Upgrades
June 2004
4
Connect AC Power to DC Power Cabinet
5
Connect Ground Wires for DC-Powered Systems
6
Turn Circuit Breakers Off
7
Connect DC Power to PPN and EPN Cabinets
8
Connect DC Battery Cabinet to DC Power Cabinet
9
If necessary,
Connect Mixed AC/DC Power and Ground
Figure 95: Typical Power and Ground for a DC-Powered Cabinet
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Ground
connection
terminal
DC battery
cabinet
B
a
tte
ry
+
+
-
-
Frame ground
1 AWG
-48 V
-48 V RTN
EPN cabinet 1
7
-48 V
-48 V RTN
EPN cabinet n
Ground
discharge
bar
To
CBC ground terminal
bar at the MDF
1 AWG
ground wire
Approved
ground
System
single point
ground
Single point
ground
block
6 AWG
6 AWG
6 AWG
6 AWG
10 AWG
DC power
from rectifiers
cydf_dc KLC 032999
3
1
Main AC
supply
(AC mains)
4
D
C
out
put
di
st
ri
b
u
ti
on b
u
s
1 AWG
5
5
5
1 AWG
7
1 AWG
-48 V
-48 V RTN
PPN cabinet
7
1 AWG
1 AWG
RTN
75A
DC power cabinet
75A
circuit
breaker
75A
75A
5
5
To next
cabinet
Rectifiers
-48V
DC
-48V D
C
8
LVD
2