Toshiba 4400 Series - Power Terminal Blocks and Cable Sizing

48
4400 Series Installation and Operation Manual – 64527-008
9.4 Power Terminal Blocks and Cable Sizing
Note: Always consult your site specic, local, state, and NEC electrical codes for wiring, cabling, and circuit protection
device requirements.
NOTICE

type DLO cabling.
          󰀨  
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 congurations.
TABLE 9.1: RECOMMENDED MINIMUM CABLE SIZE & TIGHTENING TORQUE FOR 15-30KVA UPS FOR 120/208V IN,
120/208V OUT
Block Number Cable Size (Min-Max) 75 °C Copper Wire in Conduit Tightening Torque
Terminal Lug
Capacity (AWG)
15 kVA
(AWG)
20 kVA
(AWG)
25 kVA
(AWG)
30 kVA
(AWG)
AC Input A, B, C #12 – #2 #4 #2 #2 #2
35-44 in-lb
(4-5 N•m)
(6.5 x 1.2 mm Flat blade
screwdriver)
AC Input Neutral (N)
2
#12 – #2 #2 #2 #2 #2
AC Output A, B, C #12 – #2 #6 #3 #2 #2
AC Output Neutral (N)
2
#12 – #2 #2 #2 #2 #2
Secondary Input A, B, C #12 – #2 #6 #3 #3 #2
Secondary Neutral (N)
2
#12 – #2 #2 #2 #2 #2
Battery Terminals +/-
1
#12 – #2 #2 #2 #2 #2
1
One battery string. (Consult factory if using more than one battery string.)
2
Size neutral cable appropriate to actual load type: balanced, unbalanced, non-linear.
3
No more than 3 conductors per conduit for these sizing recommendations.
Use only copper wires for external cables.
TABLE 9.2: RECOMMENDED MINIMUM CABLE SIZE & TIGHTENING TORQUE FOR 50KVA UPS FOR 120/208V IN,
120/208V OUT
Block Number Cable Size (Min-Max) 75 °C Copper Wire in Conduit
Tightening Torque
2
Terminal Lug Capacity 50 kVA
AC Input A, B, C #6 – 250 kcmil 4/0
225-250 in-lb
(25.4-28.2 N•m)
(Hex drive socket)
AC Input Neutral (N)
2
#6 – 250 kcmil 250 kcmil
AC Output A, B, C #6 – 250 kcmil 4/0
AC Output Neutral (N)
2
#6 – 250 kcmil 250 kcmil
Secondary Input A, B, C #6 – 250 kcmil 4/0
Secondary Neutral (N)
2
#6 – 250 kcmil 250 kcmil
Battery Terminals +/-
1
#6 – 250 kcmil 250 kcmil
1
One battery string. (Consult factory if using more than one battery string.)
2
Size neutral cable appropriate to actual load type: balanced, unbalanced, non-linear.
Use only copper wires for external cables.