Vertiv | Liebert® GXT5™ | Installer/User Guide 33
2.6.2. Terminal-block Connections
On 5-kVA and 10-kVA models, the hard-wire connections to the terminal blocks are made through knockouts
on the POD attached to the rear of the unit. See Removable Power Distribution Box on page 12, for the
location of the input/output knockouts on your GXT5 model. Models below 3000 VA use input cords with plugs
instead of terminal block connections.
Table 2-3 below details the electrical-connection specications.
Table 2-3 Terminal-block electrical specifications
UPS MODEL
RECOMMENDED
EXTERNAL
OVERCURRENT
PROTECTION
RECOMMENDED WIRE
SIZE (INCLUDING
GROUND WIRE) (75°C
COPPER WIRE)
MAXIMUM WIRE SIZE
ACCEPTED BY TERMI-
NAL BLOCK
TERMINAL
TIGHTENING
TORQUE
GXT5-5000IRT5UXLN
40 A
8 AWG
6 AWG
20 in.-lb (2.26
Nm)
GXT5-5000IRT5UXLE
GXT5-6000IRT5UXLN
50 A
GXT5-6000IRT5UXLE
GXT5-8000IRT5UXLN
63 A 6 AWG
GXT5-8000IRT5UXLE
GXT5-10KIRT5UXLN
GXT5-10KIRT5UXLE
GXT5-16KIRT9UXLN
1-phase: 140 A
3-phase: 50 A
35 mm
2
(1 AWG) 53.5 mm
2
(1/0 AWG)
110 in.-lb (12.4
Nm)
GXT5-16KIRT9UXLE
GXT5-20KIRT9UXLN
1-phase: 160 A
3-phase: 63 A
GXT5-20KIRT9UXLE
To make the terminal-block connections:
1. Loosen the screws from the cable-entry/conduit-box cover, and pull the cables through the knockout leaving
some slack for connection.
• We recommend using the knockouts to install input and output wiring in separate conduit. You must
use a suitable cable gland or risk electric shock.
2. Referring to the appropriate terminal-block connection instructions, connect the cables to the corresponding
input/output terminals and use a torque wrench to turn the screw clockwise until tightened as specied in
Table 2-3 above.
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