Eaton 93E External Battery Cabinet Installation Manual P-164000057—Rev 05
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Read and understand the following notes while planning and performing the installation:
WARNING
As a result of the connected loads high leakage current is possible. Connection to earth ground is required for
safety and proper product operation. Do not check EBC operation by any action that includes removal of the
earth (ground) connection with loads attached.
•
Refer to national and local electrical codes for acceptable external wiring practices.
•
Material and labor for external wiring requirements are to be provided by the customer.
•
For external wiring, use 90°C copper wire. Wire sizes listed in
are for copper wiring only. If wire is
run in an ambient temperature greater than 30°C, higher temperature wire and/or larger size wire may be
necessary. Wire sizes are based on using the specified breakers.
•
Wire ampacities are chosen from Table 310-16 of the National Electrical Code
®
(NEC
®
). Specification is for
copper wire with a 90°C rating.
•
The battery wiring used between the battery and the UPS should be a maximum of 20 meters (65 feet)
and not allow a voltage drop of more than 1% of nominal DC voltage at rated battery current.
•
Refer to NEC Article 250 and local codes for proper grounding practices.
•
Battery voltage is computed at 2 volts per cell as defined by Article 480 of the NEC. Rated battery current
is computed at 2 volts per cell.
•
The battery cabinet frame is not referenced to the DC circuit.
•
Each battery cabinet has its own overcurrent protection device.
•
External battery cabinets can be used in combination with a UPS containing internal batteries.
•
Internal battery strings are to be connected by an authorized Eaton Customer Service Engineer.
•
Refer to the appropriate Eaton 93E UPS Installation and Operation manual listed in paragraph
for UPS cabinet conduit and terminal specifications and locations.
•
The term line-up-and-match refers to accessory cabinets that are physically located adjacent to the UPS.
The term standalone refers to accessory cabinets that are located separate from the UPS.
For external power wiring requirements, including the minimum AWG size of external wiring, see
. Wire
sizes listed are for copper wiring only.
Table 3. External Power Wiring Requirements for the Eaton 93E 30EBC and 60EBC
Model
Number of Cabinets
Terminal
Battery Cabinet to UPS or Next Battery Cabinet
Minimum Conductor Size
(AWG or kcmil)
Number per Pole
30EBC
1 or 2
Battery (+)
1/0
1
Battery (–)
1/0
1
Ground
#6
1 per cabinet
60EBC
1 or 2
Battery (+)
1/0
2
Battery (–)
1/0
2
Ground
#6
1 per cabinet
