20 Installation Manual
9. WIRING CONNECTIONS9.1 Warnings
DANGER
VERIFY THAT ALL INCOMING HIGH AND
LOW VOLTAGE POWER CIRCUITS ARE
DE-ENERGIZED AND LOCKED OUT
BEFORE INSTALLING CABLES OR
MAKING ELECTRICAL CONNECTIONS.
ALL POWER CONNECTIONS MUST BE
COMPLETED BY A LICENSED
ELECTRICIAN EXPERIENCED IN WIRING
UPS EQUIPMENT, AND IN ACCORDANCE
WITH ALL APPLICABLE NATIONAL AND
LOCAL ELECTRICAL CODES.
IMPROPER WIRING MAY CAUSE DA MAGE
TO THE UPS OR INJURY TO PERSONNEL.
CAUTION
All shielded cables, non-shielded cables,
non-shielded control wires, non-shielded
battery breaker control wires, and non-
shielded remote control wires must be
housed in individual, separate, steel
conduits. Placing multiple cables in the
same conduit with other control or power
wiring may cause system failure.
9.2 Specific Connections
Refer to th e draw ings i n this manua l and a ny oth er
drawings provided by Liebert for this installation.
Make all of the following connections:
a. AC power cables from input power source
circuit breaker to UPS Module Input. Observe
phase rotation.
CAUTION
See Section 7 of this Manual for an
explanation of proper grounding
techniques.
b. AC power cables from bypass power source cir-
cuit breaker to UPS Module Bypass input.
Observe phase rotation.
c. AC power cables from UPS Module Output to
critical load. Observe phase rotation.
NOTE
If your installation includes a
Maintenance Bypass Cabinet, Switchboard
or Panelboard, some (or all) power cables
will be terminated in these cabinet(s).
Make sure all required wiring between
UPS module and the optional cabinet(s) is
completed. Observe phase rotation.
d. The UPS Module Output Neutral must be con-
nected to one common point and solidly
grounded per requirements of the National
Electrical Code. See Section 7.
CAUTION
UPS bypass and output neutral must be
connected to only one common point in
the UPS. This neutral line must be
grounded at the source.
e. For Battery Cabinets:
DC power cables and ground from Battery Cab-
inet to UPS Module, and between Battery Cab-
inets. Observe polarity. DC power cables
should be installed in matched pairs (positive
and negative).