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UPS with Bypass Electrical Installation
Circuit Breaker Input Current Ratings
Table 1 contains the required circuit breaker ratings for hardwired installations.
Table 1. Required Input Circuit Breaker Sizes (120/208 Vac or 120/240 Vac, 60 Hz)
NOTE 1
NOTE 2 To accommodate the feature of easy system expandability, it is recommended that
See Table 2 for recommended conductor sizes to wire the input circuit breakers.
Table 2. Recommended Wire Sizes
Input Circuit Breaker Size
FOR U.S. INSTALLATIONS, READ THIS IMPORTANT NOTE
Table 2 lists the mm
l
diagrams. The minimum recommended circuit breaker sizes for each model and voltage
application are listed on the wiring diagrams.
Conductor sizes shall be no smaller than the 75°C wire size based on the ampacities given in
l
Table 310–16 of the National Electrical Code
circuit conductors, including the neutral conductor, must be the same size (ampacity) wire.
Code may require a larger AWG size than shown in this table because of temperature, number
of conductors in the conduit, or long service runs. Follow local code requirements.
16
Eaton 9PXM UPS (4-20 kVA) User's Guide P-164000669—Rev 05
UPS Capacity
4 kVA
8 kVA
12 kVA
16 kVA
20 kVA
If you are installing an optional super charger module, refer to that user's guide for
the proper input circuit breaker sizes and ratings.
initial installation of the Eaton 9PXM UPS contains wiring to support the maximum
capacity of the UPS cabinet of 20kVA for 12-slot and 16-kVA for 8-slot cabinets.
75°C Copper Wire Size
25A
5.3 mm
40A
8.4 mm
60A
21.2 mm
80A
26.7 mm
100A
33.6 mm
125A
42.1 mm
2
and AWG wire size for each circuit breaker size shown on the wiring
Input Circuit Breaker Rating
25A
50A
75A
100A
125A
Conductor Screw Torque
2
(10 AWG)
4.0 Nm (35 lb in)
2
(8 AWG)
4.5 Nm (40 lb in)
2
(4 AWG)
5.1 Nm (45 lb in)
2
(3 AWG)
6.6 Nm (50 lb in)
2
(2 AWG)
6.6 Nm (50 lb in)
2
(1 AWG)
6.6 Nm (50 lb in)
!
IMPORTANT
®
®
(NEC
), ANSI/NFPA 70-1999, and article 220. All
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