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Power Terminal Blocks And Cable Sizing - Toshiba 4400 Series Installation And Operation Manual

Three phase - 15/20/25/30/50/80/100 kva
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9.4

Power Terminal Blocks and Cable Sizing

Note: Always consult your site specific, local, state, and NEC electrical codes for wiring, cabling, and circuit protection
device requirements.
The Power Lugs for the 15-100kVA UPS are not designed for use with high-flex/locomotive-
type DLO cabling.
Use of these conductors may lead to conductor strand breakage effectively reducing the
current carrying capacity of the conductor.
The terminal blocks for the 15-30 kVA UPS are shown in Figure 9.5.
Use only copper wires for external cables. See Appendix D for alternate voltage and cabling configurations.
TABLE 9.1: RECOMMENDED MINIMUM CABLE SIZE & TIGHTENING TORQUE FOR 15-30KVA UPS FOR 120/208V IN,
Block Number
AC Input A, B, C
AC Input Neutral (N)
2
AC Output A, B, C
AC Output Neutral (N)
2
Secondary Input A, B, C
Secondary Neutral (N)
2
Battery Terminals +/-
1
One battery string. (Consult factory if using more than one battery string.)
1
Size neutral cable appropriate to actual load type: balanced, unbalanced, non-linear.
2
No more than 3 conductors per conduit for these sizing recommendations.
3
Use only copper wires for external cables.
TABLE 9.2: RECOMMENDED MINIMUM CABLE SIZE & TIGHTENING TORQUE FOR 50KVA UPS FOR 120/208V IN,
Block Number
AC Input A, B, C
AC Input Neutral (N)
AC Output A, B, C
AC Output Neutral (N)
Secondary Input A, B, C
Secondary Neutral (N)
Battery Terminals +/-
One battery string. (Consult factory if using more than one battery string.)
1
Size neutral cable appropriate to actual load type: balanced, unbalanced, non-linear.
2
Use only copper wires for external cables.
48
Cable Size (Min-Max) 75 °C Copper Wire in Conduit
Terminal Lug
Capacity (AWG)
#12 – #2
#12 – #2
#12 – #2
#12 – #2
#12 – #2
#12 – #2
#12 – #2
Cable Size (Min-Max) 75 °C Copper Wire in Conduit
Terminal Lug Capacity
#6 – 250 kcmil
#6 – 250 kcmil
2
#6 – 250 kcmil
#6 – 250 kcmil
2
#6 – 250 kcmil
#6 – 250 kcmil
2
#6 – 250 kcmil
1
NOTICE
120/208V OUT
15 kVA
20 kVA
(AWG)
(AWG)
#4
#2
#2
#2
#6
#3
#2
#2
#6
#3
#2
#2
#2
#2
120/208V OUT
50 kVA
250 kcmil
250 kcmil
250 kcmil
250 kcmil
4400 Series Installation and Operation Manual – 64527-008
25 kVA
30 kVA
(AWG)
(AWG)
#2
#2
#2
#2
#2
#2
(6.5 x 1.2 mm Flat blade
#2
#2
#3
#2
#2
#2
#2
#2
Tightening Torque
4/0
4/0
4/0
Tightening Torque
35-44 in-lb
(4-5 N•m)
screwdriver)
2
225-250 in-lb
(25.4-28.2 N•m)
(Hex drive socket)

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