Multiple Battery Cabinets; Power Terminal Blocks And Cable Sizing - Toshiba 4400 Series Installation And Operation Manual

9.3

Multiple Battery Cabinets

Multiple DC Backup Source cabinets may be combined to extend the UPS backup runtime. Typically
these cabinets must be connected to a single point connection outside the UPS. Contact the factory if
using more than one DC Source Backup cabinet.
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 50-80kVA UPS are not designed for use with high-flex/locomotive-type
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 9.4.
Use only copper wires for external cables. See Appendix D for alternate voltage and cabling configurations.
TABLE 9.1 RECOMMENDED CABLE SIZE & TIGHTENING TORQUE FOR 15-30KVA UPS FOR
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
The terminal blocks for the 15-30 kVA UPS are shown in Figure 9.4.
4400 Series Installation and Operation Manual – 64527-006
NOTICE
120/208V IN, 120/208V OUT
Cable Size (Min-Max) 75 °C Copper Wire in Conduit
Terminal Lug 15 kVA
Capacity (AWG) (AWG)
#12 – #2 #4
#12 – #2 #2
#12 – #2 #4
#12 – #2 #2
#12 – #2 #4
#12 – #2 #2
#12 – #2 #6
20 kVA 25 kVA 30 kVA
(AWG) (AWG) (AWG)
#3 #2 #2
#2 #2 #2
#3 #2 #2
#2 #2 #2
#3 #2 #2
#2 #2 #2
#3 #2 #2
Tightening
Torque 2
35-44 in-lb
(4-5 N•m)
(6.5 x 1.2 mm
Flat blade
screwdriver)
41