Appendix D - Internal Xfmr Unit Input/Output Cabling Guide; D.1 - Ups Power Lug Cable Capacity And Torque Specifications; D.2 - Input Cable Size For 3-Phase/4-Wire + G - Toshiba 4400 Series Installation And Operation Manual

Appendix D – Internal XFMR Unit Input/Output Cabling Guide
The 4400 Series UPS can be configured with a variety of Input and Output voltage transformers to accommodate different Input/Output voltage combinations.
The following tables and text assist with sizing cable for units with non-native input and output voltages.
Table D.1 – UPS Power Lug Cable Capacity and Torque Specifications
Recommended Minimum Input Cable Size for 3-Phase/4-Wire + G
Table D.2 –
Recommended Minimum Output/Bypass Cable Size for 3-Phase/4-Wire + G
Table D.3 –
Table D.4 – Recommended Minimum Cable Size for 3-Phase/3-Wire + G
Table D.5 – Recommended Minimum Cable Size for 3-Phase/3-Wire + G
Table D.6 – Recommended Battery Cabling
Table D.7 – Input Transformer Current for Given Input Voltage
Table D.8 – Output Transformer Current for Given Output Voltage
Tables D.2 and D.3 list the recommended Power Cable sizing for each of the UPS – Vin/Vout transformers. Ampacity should be determined using Table
310.15(B)(16) of the NEC (National Electrical Code) for 75° copper conductors.
NOTES:
3-Phase/4-Wire cable sizing calculations based on 4-6 current carrying conductors per conduit. (NEC Table
•
310.15(B)(2)(a))
Neutral cable sizing in Table D.2 and D.3 is based on allowing, when possible, 1.7 x I(line) for current carrying Neutral.
•
Otherwise, the maximum cable size allowed by the UPS power lug is specified.
80 kVA For ease of installation, consider the alternative of substituting two (2) line-sized neutral cables in place of a
• –
single larger neutral cable in 3-Phase, 4-Wire 80kVA installations
D.1 – UPS Power Lug Cable Capacity and Torque Specifications
TABLE D.1 – UPS POWER LUG CABLE CAPACITY AND TORQUE SPECIFICATIONS
15-30kVA
50kVA
80kVA
D.2 – Input Cable Size for 3-Phase/4-Wire + G
TABLE D.2 – RECOMMENDED INPUT CABLE SIZE FOR 3-PHASE/4-WIRE + G
Vin, Vout, Vbyp
3P/4W+G
208/120V (no Phase
Xfmr)
Neutral
220/127V Phase
Neutral
230/133V Phase
Neutral
240/139V Phase
Neutral
380/220V Phase
Neutral
4400 Series Installation and Operation Manual – 64527-008
UPS POWER LUG CABLE CAPACITY
(1) x #12 to #2
(1) x #6 to 250 kcmil
(2) x 1/0 to 600 kcmil
15kVA 20kVA
(AWG) (AWG)
#4
#2
#4
#2
#6
#3
#6
#2
#8
#4
25kVA
(AWG)
#3 #2
#2 #2
#3 #2
#2 #2
#4 #3
#2 #2
#4 #3
#2 #2
#6 #6
#3 #2
TORQUE
87 in-lb (9.8 N∙m)
275 in-lb (31 N∙m)
375 in-lb (42 N∙m)
1
30kVA 50kVA
(AWG) (AWG)
#2 4/0
#2 250 kcmil
#2 4/0
#2 250 kcmil
#2 3/0
#2 250 kcmil
#2 4/0
#2 250 kcmil
#4 #1
1/0 4/0
80kVA
(AWG)
500 kcmil
2 x 500 kcmil
500 kcmil
2 x 350 kcmil
500 kcmil
2 x 300 kcmil
400 kcmil
2 x 300 kcmil
3/0
500 kcmil
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