Vertiv Liebert EXS - Page 28

WARNING! Risk of electrical shock. Can cause equipment damage, injury and death.
Before beginning installation, verify that all external overcurrent protection devices are open (Off), and that
they are locked out and tagged appropriately to prevent activation during the installation. After the power
cables are connected, the terminal block’s protective cover must be reinstalled to remove the electric shock
hazard.
When connecting input and output cables, follow national and local wiring regulations, take the environment into account, and
refer to NFPA70, Table310-16. The recommended minimum cables and overcurrent protection is listed in Table 3.1 below,
and Table 3.2 below, are based upon an 86 °F(30 °C)ambient temperature.
Rating
Maximum
Current, Amps
Recommended
OPD, Amp Trip
167 °F (75 °C) THW
Copper Wire (phase) Number of
Cables per Phase: 1
167 °F (75 °C) THW
Copper Wire (neutral)
Number of Cables: 1-2
167 °F (75 °C) THW
Copper Wire (Ground)
Number of Cables: 1
15 59 80 3 3 3
20 75 100 2 2 2
30 117 150 3/0 3/0 3/0
40 149 200 4/0 4/0 4/0
Table 3.1 Currents and Wire Size—UPS Rectifier Input
Rating
Maximum
Current, Amps
Recommended
OPD, Amp Trip
167 °F (75 °C) THW
Copper Wire (phase) Number of
Cables per Phase: 1
167 °F (75 °C) THW
Copper Wire (neutral)
Number of Cables: 1-2
167 °F (75 °C) THW
Copper Wire (Ground)
Number of Cables: 1
15 42 80 4 4 4
20 56 100 2 2 2
30 84 125 1/0 1/0 1/0
40 112 150 3/0 3/0 3/0
Table 3.2 AC Currents and Wire Size—UPS Bypass Input and Output4
AWG (mm
2
)
2 AWG (32.6 mm
2
) 3 AWG (26.1 mm
2
) 4 AWG (20.6 mm
2
)
Manufacturer Part# Thomas and Betts: 256-30695-257 Thomas and Betts: 256-30695-257 Thomas and Betts: 256-30695-255
Recommended Torque 177 lb-in./14.7 lb-ft./20 Nm
Table 3.3 Recommended Wire Lug for Phase, Neutral, and Ground Conductors
AWG (mm
2
)
0 AWG (53.5 mm
2
) 3/0 AWG (85.3 mm
2
) 4/0 AWG (108.6 mm
2
)
Manufacturer Part# Thomas and Betts: 54209 Thomas and Betts: 54211 Thomas and Betts: 54212
Recommended Torque 177 lb-in./14.7 lb-ft./20 Nm
Table 3.4 Recommended Wire Lug for Phase, Neutral, and Ground Conductors
22 Proprietary and Confidential ©2023 Vertiv Group Corp. 3 Installation and Commissioning
Vertiv™ Liebert® EXS Installer/User Guide