R90 ONLINE USER’S MANUAL
UNINTERRUPTIBLE POWER SUPPLY (UPS)
Xtreme Power Conversion Corporation (Rev 3/7/14)
Page 15
CAUTION!
Select a thermo magnetic circuit-breaker with an IEC 60947-2 trip curve C (normal) for
125% of the current as listed below.
40A Input Circuit Breaker required
Power Cables
The cable design shall comply with the voltages and currents provided in this section, and in accordance
with local electrical codes.
WARNING!
UPON STARTING, PLEASE ENSURE THAT YOU ARE AWARE OF THE LOCATION AND
OPERATION OF THE EXTERNAL ISOLATORS WHICH ARE CONNECTED TO THE UPS
INPUT/BYPASS SUPPLY OF THE UTILITY DISTIRBUTION PANEL. CHECK TO SEE IF THESE SUPPLIES
ARE ELECTRICALLY ISOLATED, AND POST ANY NECESSARY WARNING SIGNS TO PREVENT ANY
INADVERTENT OPERATION
Cable Sizes
UPS MODEL
CABLE SIZES (THHW wiring at 75
°
C)
AC INPUT
AC OUTPUT
DC INPUT
GROUNDING
R90-20KVA
8 awg
8 awg
6 awg
8 awg
CAUTION!
Protective earth ground cable: connect each cabinet to an earth ground, following the
shortest route possible.
WARNING!
FAILURE TO FOLLOW ADEQUATE GROUNDING PROCEDURES MAY RESULT IN
ELECTROMAGNETIC INTERFERENCE OR IN HAZARDS INVOLVING ELECTRICAL SHOCK AND FIRE.