Table 3-7. Power Cable Conduit Requirements; Table 3-8. Recommended Input Circuit Breaker Ratings - Eaton 9E Generation 3 Installation And Operation Manual

UPS Installation Plan and Unpacking
Conduit sizes were chosen from NEC Table 4, Electrical Metallic Tubing (EMT). See Table 3-7 for conduit
requirements.
Per NEC article 300, 3(B)(1), all three-phase conductors must be run in the same conduit. Neutral and ground
must be run in the same conduit as the phase conductors.
Conduit is sized to accommodate one neutral conductor the same size as the phase conductor and one ground
conductor sized in accordance with NEC Table 250.122. This product can support a 1.5x sized neutral. If two
neutral conductors or an oversized neutral conductor are to be installed, verify the size of the conduit needed
to accommodate the extra wire or size and use that conduit size in place of the conduit size listed in Table 3-7.
Conduit sizes listed are for copper wiring only.

Table 3-7. Power Cable Conduit Requirements

UPS Model
Eaton 9E–20 208/220 Vac
Eaton 9E–30/20
Eaton 9E–30/30 208/220 Vac
External overcurrent protection and disconnect are not provided by this product, but are required by codes.
Refer to Table 3-5 for wiring requirements. If an output lockable disconnect is required, it is to be supplied by
the customer.
Table 3-8 lists the recommended rating for input circuit breakers.

Table 3-8. Recommended Input Circuit Breaker Ratings

To reduce the risk of fire, connect only to a circuit provided with maximum input
circuit breaker current ratings from Table 3-8 in accordance with the NEC, ANSI/NFPA 70.
3-10 Eaton 9E UPS (20–30 kVA, 208/220V) Generation 3 Installation and Operation Manual P-164000301—Rev 1
Voltage Terminal
AC Input to UPS Rectifier
(A, B, C, Neutral, Ground)
AC Input to Bypass and Output (Five Wire)
(A, B, C, Neutral, Ground)
DC Battery
(Positive, Negative, Ground)
AC Input to UPS Rectifier
(A, B, C, Neutral, Ground)
AC Input to Bypass and Output (Five Wire)
(A, B, C, Neutral, Ground)
DC Battery
(Positive, Negative, Ground)
UPS Mode
Eaton 9E–20
Eaton 9E–30/20
Eaton 9E–30/30
Number of Wires Minimum Conduit
in Conduit
5
5
3
5
5
3
Input Rating
Load Rating
80% Rated
100% Rated
80% Rated
100% Rated
CAUTION
www.eaton.com/powerquality
Number of
Trade Size Conduits
1-1/2 1
1-1/2 1
1-1/2 1
2 1
2 1
2 1
208/220V
100A
80A
125A
100A