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UPS ELECTRICAL INSTALLATION
Eaton 9170
+
UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality
41
See Table 7 for recommended conductor sizes to wire the input circuit
breakers.
Table 7. Recommended Wire Sizes
Input Circuit Breaker Size 75°C Copper Wire Size Conductor Screw Torque
25A 5.3 mm
2
(10 AWG) 4.0 Nm (35 lb in)
40A 8.4 mm
2
(8 AWG) 4.5 Nm (40 lb in)
60A 21.2 mm
2
(4 AWG) 5.1 Nm (45 lb in)
80A 26.7 mm
2
(3 AWG) 6.6 Nm (50 lb in)
100A 33.6 mm
2
(2 AWG) 6.6 Nm (50 lb in)
125A 42.1 mm
2
(1 AWG) 6.6 Nm (50 lb in)
FOR U.S. INSTALLATIONS, READ THIS IMPORTANT NOTE!
This table lists the mm
2
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 310–16 of the National Electrical Code, ANSI/NFPA 70-1999, 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.