22 Wiring Considerations
8.3 Battery Wiring
Power wiring to the Battery Cabinet connects positive,negative, and ground power cables from
the Battery Cabinet to the associated UPS. Connection of the UPS to the Battery Cabinet serves
to both charge and discharge the batteries (when needed). The battery disconnect (circuit breaker)
requires a control cable.Liebert Battery Cabinets include power and control cables to join multi-
ple cabinets together intoa system. Additional (field-supplied) power or controlwiring might be
necessary to connect the battery cabin et system to the UPS. Refer to Figure 16 throu gh
Figure 18.
DANGER
A BATTERY INTERCELL CONNECTION ON EACH TIER OF THE
LIEBERT BATTERY CABINET IS DISCONNECTED FOR SAFETY
DURING SHIPMENT. DO N OT COMPLETE THESE
CONNECTIONS.THE LIEBERT GLOBAL SERVICES
REPRESENTATIVE WILL COMPLETE THESE CONNECTIONS
AS PART OF START-UP. AN IMPROPERLY INSTALLED UNIT
CAN RESULT IN INJURYTO PERSONNEL OR DAMAGE TO
EQUIPMENT.
CAUTION
Be surepolarity is correct when wiring theB atteryCabinet to the
connected equipment (p ositive to positive; negative to ne gative).
If polarityis not correct, fuse failuresor equipment damage can
result.
CAUTION
DC power cablesshould be installed inconduit with conductors
in matched pairs (p ositive and negative).
NOTE
A Liebert Battery Specialist can perform ad etailedinspection of the entire
batterysystem to ensure it meets currentIEEE standards. This inspection
service is recommende d because batteries are a ve ry critical part of the UPS
system.