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Eaton 93PM Integrated Accessory Cabinet-Tie (50 kW and 100 kW IAC-T) Installation and Operation Manual P-164000371—Rev 05
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 IAC-T 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.
•
For external wiring, use 90°C rated copper wire with the ampacity based on 75°C copper stranded wire.
Wire sizes listed in
through
are for copper wiring only. If wire is run in an ambient
temperature greater than 40°C, higher temperature wire and/or larger size wire may be necessary. Wire
sizes are based on using the specified breakers.
•
The IAC-T AC output wiring to the critical load for 1+1, 2+1, or 3+1 parallel configurations should be sized
the same as if wiring a 2+0, 3+0, or 4+0 parallel system respectively if a Maintenance Isolation Switch
(MIS) is not installed in the IAC-T.
•
Recommended wire sizes are based on NFPA National Electrical Code
®
(NEC
®
)70 Table 310.15(B)(16) 75°
C ampacity with 40°C ambient correction factors.
•
A neutral conductor is not used from the source or supplied to the load.
•
Refer to NEC Article 250 and local codes for proper grounding practices.
•
Phase rotation must be clockwise starting with phase A (rotation A, B, C).
•
Per NEC Article 300-20(a), all phase, ground, and equipment ground conductors must be run in the same
conduit when there is a risk of induced currents.
•
Conduit is to be sized to accommodate one neutral conductor the same size as the phase conductor and
one ground conductor. If two neutral conductors or an oversized neutral conductor are to be installed, size
the conduit to accommodate the extra wire or size.
•
Refer to the appropriate Eaton 93PM UPS Installation and Operation manual listed in paragraph
for UPS cabinet conduit and terminal specifications and locations.
•
Material and labor for external wiring requirements are to be provided by the customer.
•
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 Integrated Accessory Cabinet-Tie (IAC-T) external power wiring recommendations, including the minimum
AWG size of external wiring, see
through
. Wire sizes listed are for copper wiring only.
Table 3. External Power Wiring Recommendations for the Eaton 93PM 50 kW IAC-T and 93PM 100 kW IAC-T – 1+1, and 2
+0 Parallel Configurations without MIS and MBP
Basic Unit Rating
Units
Rating 60 Hz
kW
50
50
100
100
Input/Output Voltage
Volts
480/480
480/480
480/480
480/480
Parallel Configuration
—
1+1
2+0
1+1
2+0
AC Input from each UPS
Full Load Current from each UPS
(3) Phases, (1) Ground
A
Maximum Amps
60
60
120
120
Minimum Conductor Size (Phase A, B, and C)
Number per Phase
AWG or kcmil
(each)
4
(1)
4
(1)
2/0
(1)
2/0
(1)
Summary of Contents for 93PM IAC-T Series
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