Instruction manual

POWER AND GROUNDING
USE APPROVED GROUND LOCATED NEAREST THE
GROUND
BATTERY PLANT
APPROVED
GROUND
(SEE NOTE)
DISCHARGE
10 AWG
COUPLED
BONDING
CONDUCTOR
(CBC)
CUSTOMER
.
.
.
60-HZ 50-AMP
RECEPTACLE,
AC
POWER
CORD
10 FEET
OR
EQUIVALENT
115-VOLT
NEMA 5-50
L6-30R
PROVIDED
POWER
COUPLED
BONDING
6 AWG
CONDUCTOR
10 AWG
OR
208-VOLT
60-HZ 30-AMP
SERVICE
REAR
CABINET
GROUND
BLOCK
OR
PANEL
TELEPHONE COMPANY OWNED PROTECTOR GROUND BLOCK
AT THE BUILDING ENTRANCE FACILITY
FRONT
NOTE:
EXPANSION PORT
REAR
FRONT
PROCESSOR PORT
NETWORK (PPN) CABINET
1 GAUGE UP
TO 50 FEET OR
-48 V -48 V RTN
-48 V
BAR
TO
AUXILIARY
CABINET
GROUND
BLOCK
DISTRIBUTION UNIT
DC POWER
AC POWER
DISTRIBUTION
UNIT
SINGLE
POINT
CABINET
GROUND
6 AWG
TO
APPROVED
GROUND
(SEE NOTE)
NETWORK (EPN) CABINET
(75A
ENGINEERED FOR
LESS THAN 1%
VOLTAGE DROP
FIGURE 23. Typical Multi-Carrier Mixed AC/DC Power and Grounding Layout
(Remotely Located EPN)
For DC-powered systems, a ground wire must be installed from the isolated Ground Discharge
Bar on the battery plant to the Approved Ground. (See ‘‘Grounding.’’) The size of the wire must
be no smaller than the largest wire in the system and must be larger than 6 AWG. The approved
ground connection must be identified with a Form 15657NR or equivalent grounding tag. The
Ground Discharge Bar shall not be connected electrically to the chassis of the chargers, power
board, or inverters. All output power must be isolated from the input power.
A 6-AWG ground wire must be connected to the ground block in the bottom of each cabinet
(Figure 21). The ground wire is routed out of the cabinet and terminated on the battery plant.
126