2 6
Chapter 5 Installation and Wiring
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Capacity (kVA)
20kVA
30kVA
40K kVA
60K kVA
AC Input Cable*
2 AWG
(25mm
2
)
1/0 AWG
(50 mm
2
)
3/0 AWG
(70 mm
2
)
250 kcmil
(120 mm
2
)
Bypass Input Cable*
2 AWG
(25mm
2
)
1/0 AWG
(50 mm
2
)
3/0 AWG
(70 mm
2
)
250 kcmil
(120 mm
2
)
Output Cable*
2 AWG
(25mm
2
)
1/0 AWG
(50 mm
2
)
3/0 AWG
(70 mm
2
)
250 kcmil
(120 mm
2
)
Battery Input Cable*
1 AWG
(35 mm
2
)
1/0 AWG
(50 mm
2
)
3/0 AWG
(70 mm
2
)
300 kcmil
(150 mm
2
)
Tightening Torque
M8= 130 ± 4.4 lb-in (150 ± 5 Kgf-cm)
Input Breaker
75A
(3-pole × 1)
125A
(3-pole × 1)
150A
(3-pole × 1)
225A
(3-pole ×1 )
* Use only cooper wire rated 194°F (90°C) or higher.
NOTE:
1. In accordance with National Electrical Codes (NEC), please install a suitable
conduit and bushing.
2. Please refer to national and local electrical codes for acceptable non-fuse
breakers and cable size.
3. Cables with PVC material and with temperature resistance up to 221°F (105°C)
are suggested.
4. Make sure that the input/ output/ battery cables are locked tightly.
y
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-
verse the polarity.
y
The grounding cable of the external battery cabinet must be connected to the ( ) termi-
nal of the battery terminal block.
y
Installer should consider the maximum current and wiring gauge that may be required for
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y
The UPS default setting is single input. If there is an intention to change the UPS into dual
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nel. Check whether the electric potential of the neutral line (N) of the bypass source is the
same as that of the neutral line (N) of the main AC source. If they do not share a common
neutral line system, add an isolation transformer to the bypass source.
