14 Installation Manual
Figure 7. Preferred Battery Cabinet Grounding Configuration
GROUNDING
ELECTRODE
PER NEC 250-24
TO OUTPUT
DISTRIBUTION
7.7. Preferred Grounding Configuration, Battery Systems Large, open-rack battery systems are normally
either locally grounded or left ungrounded,
depending on local code requirements.
Battery cabinet systems, on the other hand , should
be grounded to the UPS ground bus bar. Figure 7
above illustrates how a simple one-cabinet system
would be grounded. For systems with multiple
cabinets, the same configuration would apply.
However, for simplicity the installer can connect all
the battery cabinet grounds together and run a
single ground conductor (in the same conduit as
the phase conductors) to the UPS ground .