Liebert Ship-Ahead Input/Output Cabinet NXL - Manual (Page 11)

Electrical Installation
7
Notes on Tables
1. Nominal input current (considered continuous) is based on full-rated output load. Maximum
current includes nominal input current and maximum battery recharge current (considered
noncontinuous). Continuous and noncontinuous current are defined in NEC 100. Maximum input
current is controlled by the current limit setting which is adjustable. Values shown are for
maximum setting of 125%. Standard factory setting is 125%.
2. Recommended bypass external overcurrent protection is based on 125% overload capacity for 10
minutes.
3. All recommended external overcurrent protections are based on 80% rated breakers.
4. Nominal battery voltage is shown at 2.0 volts / cell.
Table 4 Current ratings—battery
UPS Rating
Nominal VDC
Maximum Battery
Current at EOD
External Breaker
Trip, Amps kVA kW
250 225 480 615 700
300 270 480 737 800
400 360 480 981 1000
Table 5 Recommended conduit and cable sizes
Rectifier Input
UPS Rating
Voltage
(VAC)
Nominal Selection Alternate Selection
Top Cable Entry Input
Wire & Conduit
Ph, G THW / FMC
Bottom Cable Entry
Input Wire & Conduit
Ph, G THW / RNC
Top Cable Entry Input
Wire & Conduit
Ph, G THW / FMC
Bottom Cable Entry
Input Wire & Conduit
Ph, G THW / RNC kVA kW Input Bypass Output
250 225 480 480 480
(2) 2.5C 3-250kcmil,
#1/0AWG
(2) 2.5C 3-250kcmil,
#1/0AWG
(3) 2C 3-#2/0AWG,
#1/0AWG
(3) 2C 3-#2/0AWG,
#1/0AWG
300 270 480 480 480
(2) 3C 3-350kcmil,
#1/0AWG
(2) 3C 3-350kcmil,
#1/0AWG
(3) 2.5C 3-#4/0AWG,
#1/0AWG
(3) 2.5C 3-#4/0AWG,
#1/0AWG
400 360 480 480 480
(2) 3C 3-500kcmil,
#1/0AWG
(2) 3.5C 3-500kcmil,
#1/0AWG
(3) 2.5C 3-250kcmil,
#1/0AWG
(3) 2.5C 3-250kcmil,
#1/0AWG
Bypass Input
UPS Rating Voltage (VAC)
Nominal Selection Alternate Selection
Top Cable Entry Input
Wire & Conduit
Ph, N, G THW / FMC
Bottom Cable Entry
Input Wire & Conduit
Ph, N, G THW / RNC
Top Cable Entry Input
Wire & Conduit
Ph, N, G THW / FMC
Bottom Cable Entry
Input Wire & Conduit
Ph, N, G THW / RNC kVA kW Input Bypass Output
250 225 480 480 480
(3) 2.5C 3-#2/0AWG,
2-#1/0AWG, #1/0AWG
(3) 3C 3-#2/0AWG,
2-#1/0AWG, #1/0AWG
(2) 3C 3-250kcmil,
2-#4/0AWG, #1/0AWG
(2) 3C 3-250kcmil,
2-#4/0AWG, #1/0AWG
300 270 480 480 480
(3) 2.5C 3-#4/0AWG,
2-#1/0AWG, #1/0AWG
(3) 3C 3-#4/0AWG,
2-#1/0AWG, #1/0AWG
(2) 3C 3-350kcmil,
2-#4/0AWG, #1/0AWG
(2) 3.5C 3-350kcmil,
2-#4/0AWG, #1/0AWG
400 360 480 480 480
(3) 3C 3-250kcmil,
2-#4/0AWG, #1/0AWG
(3) 3C 3-250kcmil,
2-#4/0AWG, #1/0AWG
(2) 3.5C 3-500kcmil,
2-350kcmil, #1/0AWG
(2) 4C 3-500kcmil,
2-350kcmil, #1/0AWG
Output
UPS Rating Voltage (VAC)
Nominal Selection Alternate Selection
Top Cable Entry Input
Wire & Conduit
Ph, N, G THW / FMC
Bottom Cable Entry Input
Wire & Conduit
Ph, N, G THW / RNC
Top Cable Entry Input
Wire & Conduit
Ph, N, G THW / FMC
Bottom Cable Entry
Input Wire & Conduit
Ph, N, G THW / RNC kVA kW Input Bypass Output
250 225 480 480 480
(3) 2.5C 3-#2/0AWG,
2-#1/0AWG, #1/0AWG
(3) 3C 3-#2/0AWG,
2-#1/0AWG, #1/0AWG
(3) 2.5C 3-#2/0AWG,
2-#1/0AWG, #1/0AWG
(3) 3C 3-#2/0AWG,
2-#1/0AWG, #1/0AWG
300 270 480 480 480
(3) 2.5C 3-#4/0AWG,
2-#1/0AWG, #1/0AWG
(3) 3C 3-#4/0AWG,
2-#1/0AWG, #1/0AWG
(3) 2.5C 3-#4/0AWG,
2-#1/0AWG, #1/0AWG
(3) 3C 3-#4/0AWG,
2-#1/0AWG, #1/0AWG
400 360 480 480 480
(3) 3C 3-250kcmil,
2-#4/0AWG, #1/0AWG
(3) 3C 3-250kcmil,
2-#4/0AWG, #1/0AWG
(3) 3C 3-250kcmil,
2-#4/0AWG, #1/0AWG
(3) 3C 3-250kcmil,
2-#4/0AWG, #1/0AWG
Battery
UPS Rating Voltage (VAC)
Nominal Selection Alternate Selection
Top Cable Entry Input
Wire & Conduit
Wires, G THW / FMC
Bottom Cable Entry Input
Wire & Conduit
Wires, G THW / RNC
Top Cable Entry Input
Wire & Conduit
Wires, G THW / FMC
Bottom Cable Entry Input
Wire & Conduit
Wires, G THW / RNC kVA kW Input Bypass Output
250 225 480 480 480
(2) 2.5C 2-350kcmil,
#1/0AWG
(2) 2.5C 2-350kcmil,
#1/0AWG
(3) 2C 2-#4/0AWG,
#1/0AWG
(3) 2C 2-#4/0AWG,
#1/0AWG
300 270 480 480 480
(2) 2.5C 2-500kcmil,
#1/0AWG
(2) 3C 2-500kcmil,
#1/0AWG
(3) 2C 2-250kcmil,
#1/0AWG
(3) 2C 2-250kcmil,
#1/0AWG
400 360 480 480 480
(3) 2.5C 2-500kcmil,
#4/0AWG
(3) 3C 2-500kcmil,
#4/0AWG
(4) 2C 2-250kcmil,
#4/0AWG
(4) 2.5C 2-250kcmil,
#4/0AWG
If the UPS is used in a four-wire system, the neutral ground jumper must be removed.