Vertiv Liebert EXS - Page 2

LIEBERT® EXS™ UPS 208/220 ‑V 15 – 20 KVA
Quick Installation Guide
2 590-1912-501B/SL-26156_REV1
POWER WIRING AND
CONDUIT
When connecting wiring, follow the
local wiring regulations, and take the
environment situation into account.
NOTE: The conduit size and wiring
method must be in accordance with
all local, regional and national codes
and regulations, including NEC
ANSI/NFPA 70.
The maximum current for operating
modes, the recommended wire
sizes, and the recommended power
cables and plugs are listed in Tables
1 to 3, above, and are based upon an
86°F (30°C) ambient temperature.
Lock-out and tag before
you begin
Ensure that the feeder breakers are
open and locked, and tagged to
prevent inadvertent operation by
unauthorized personnel.
Table 3 Recommended lug sizes
6AWG (13.3mm
2
) 4AWG (21.2mm
2
) 3AWG (26.7mm
2
) 2AWG (33.6mm
2
)
Part
Number
McMaster-Carr: 7113K366 McMaster-Carr: 7113K441 McMaster-Carr: 6926K54 McMaster-Carr: 6926K54
Thomas & Betts: RE6-14 Thomas & Betts: 54138NT02 Thomas & Betts: 54107NT Thomas & Betts: 54107NT
—
Thomas & Betts: 54106NT — Tyco Electronics: 132331-1
Table 1 Currents and Wire Size — UPS rectifier input
Unit Rating
Maximum Input
Current (A)
Recommended OPD,
AmpTrip
75°C THW Copper Wire (phase)
Number of Cables per phase:1
75°C THW Copper Wire
neutral)
Number of Cables:1
75°C THW Copper Wire
(ground)
Number of Cables: 1
15 kVA/kW 53 70 3 AWG 4 AWG 6 AWG
20 kVA/kW 71 90 2 AWG 6 AWG 6 AWG
Table 2 AC Currents and Wire Size — UPS bypass input* and output
Unit Rating
Maximum Input
Current (A)
Recommended OPD,
AmpTrip
75°C THW Copper Wire (phase)
Number of Cables per phase:1
75°C THW Copper Wire
(neutral)
Number of Cables:1
75°C THW Copper Wire
(ground)
Number of Cables: 1
15 kVA/kW
42 60 4AWG 4 AWG 6 AWG
20 kVA/kW
56 70 3 AWG 3 AWG 6 AWG
*Bypass input for dual-input configurations only.