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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 into a system. Additional (field-supplied) power or control wiring might be
necessary to connect the battery cabinet system to the UPS. Refer to Figure 16 through
Figure 18.
DANGER
A BATTERY INTERCELL CONNECTION ON EACH TIER OF THE
LIEBERT BATTERY CABINET IS DISCONNECTED FOR SAFETY
DURING SHIPMENT. DO NOT COMPLETE THESE
CONNECTIONS. THE LIEBERT GLOBAL SERVICES
REPRESENTATIVE WILL COMPLETE THESE CONNECTIONS
AS PART OF START-UP. AN IMPROPERLY INSTALLED UNIT
CAN RESULT IN INJURY TO PERSONNEL OR DAMAGE TO
EQUIPMENT.
CAUTION
Be sure polarity is correct when wiring the Battery Cabinet to the
connected equipment (positive to positive; negative to negative).
If polarity is not correct, fuse failures or equipment damage can
result.
CAUTION
DC power cables should be installed in conduit with conductors
in matched pairs (positive and negative).
NOTE
A Liebert Battery Specialist can perform a detailed inspection of the entire
battery system to ensure it meets current IEEE standards. This inspection
service is recommended because batteries are a very critical part of the UPS
system.