38 4–20kVA Users Guide P-164000669 4–20kVA Users Guide P-164000669—Rev 09
Table 5. UPS Recommended Breaker Sizes
UPS Capacity Input Circuit breaker Rating 75°C Copper Wire Size
4kVA 25A
5.3 mm2 (10 AWG)
8kVA 50A
8.4 mm2 (8 AWG)
12kVA 80A
21.2 mm2 (4 AWG)
16kVA 100A
33.6 mm2 (2 AWG)
20kVA 125A
42.1 mm2 (1 AWG)
NOTE If a super charger is installed in an EBM, the circuit breaker for the AC input to EBM
must be a 25 A breaker with 5.3 mm2 (10 AWG) copper wire.
NOTE To accommodate the feature of easy system expendability, it is recommended that
initial installation of the Eaton 9PXM UPS contains wiring to support the maximum
capacity of the UPS cabinet : 20kVA for 12–slot cabinets and 16kVA for 8 slot chassis.
See for recommended conductor sizes to wire the input circuit breakers.
Table 6. UPS Recommended Wire Sizes
Input Breaker Size 75° Copper Wire Size Conductor Screw Tourqe
25A
5.3 mm2 (10 AWG) 4.0 Nm (35 lb in)
50A
8.4 mm2 (8 AWG) 4.5 Nm (40 lb in)
80A
21.2 mm2 (4 AWG) 5.1 Nm (45 lb in)
100A
33.6 mm2 (2 AWG) 6.6 Nm (50 lb in)
125A
42.1 mm2 (1 AWG) 6.6 Nm (50 lb in)
IMPORTANT
FOR U.S. INSTALLATIONS, READ THIS IMPORTANT NOTE
• lists the mm2 and AWG wire size for each circuit breaker size shown on the wiring 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 Table 310.15
(B)(16) of the National Electrical Code® (NEC®), ANSI/NFPA 70-2017, and article 220. All 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.
UPS Input Current Ratings
To Next Page
Loading...
Need help?
General
