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Installing the coupled bonding conductor
Issue 3 January 2008 59
Figure 27: Typical power and ground for a DC power cabinet
Note:
Note: For a high-rise building, connect the CBC to an approved building ground on
each floor.
Note:
Note: Below is general information for installing the CBC in all installations having
exposed facilities.
Figure notes:
1. Approved Ground
2. 1 AWG Ground Wire
3. CBC Ground Terminal Bar at the
MDF (if used)
4. System Single-point Ground
Discharge Bar
5. DC Power Cabinet J58890R or
new DC system
6. Ground Wire for Battery (+)
7. Battery Frame Ground
8. DC Battery Cabinet
9. Main AC Supply (AC Mains)
10. AC to DC power cabinet
11. To Next DC-powered Media Gateway
12. DC load circuit breakers
50A
50A
50A
50A
-48
VDC
-48V
-48V
-48V
-48V RTN
-48V RTN
-48V RTN
MCC
MCC
MCC
10 AWG
RED
10 AWG
6 AWG
AC
phase
AC
phase
10 AWG
10 AWG
10 AWG
10 AWG
BLACK
RTN
cydfdc3i KLC 050304
BLACK
10 AWG
RED
BLACK
10 AWG
RED
10 AWG
RED
10 AWG
BLACK
Battery
circuit
breaker
+
-
LVD
Rectifiers
DC power
from rectifiers
+
-
Green/Yellow
Green/Yellow
Green/Yellow
1
2
3
4
5
6
7
8
9
10
11
12