38 G8000 Series Installation and Operation Manual
4 Cable sized for neutral current=1.7Xphase current. Size cable appropriate to actual load type: balanced, unbalanced, non-linear.
TABLE 11.6 RECOMMENDED CABLE SIZE AND FASTENER TORQUE FOR 300 KVA UPS

Bus Number Cable Size (Min-Max) Tightening

Torque2
75 °C Copper Wire 90 °C Copper Wire
1 (2) 250 kcmil – (3) 2/0 (2) 4/0 – (3) 1/0 540 in.-lb. (61 N•m)
2 (2) 250 kcmil – (3) 2/0 (2) 4/0 – (3) 1/0 540 in.-lb. (61 N•m)
3 (2) 250 kcmil – (3) 2/0 (2) 4/0 – (3) 1/0 540 in.-lb. (61 N•m)
41(4) 300 kcmil – (4) 350 kcmil (4) 300 kcmil – (4) 350 kcmil 540 in.-lb. (61 N•m)
51(4) 300 kcmil – (4) 350 kcmil (4) 300 kcmil – (4) 350 kcmil 540 in.-lb. (61 N•m)
6 (2) 300 kcmil – (3) 2/0 (2) 250 kcmil – (3) 1/0 540 in.-lb. (61 N•m)
7 (2) 300 kcmil – (3) 2/0 (2) 250 kcmil – (3) 1/0 540 in.-lb. (61 N•m)
8 (2) 300 kcmil – (3) 2/0 (2) 250 kcmil – (3) 1/0 540 in.-lb. (61 N•m)
94(2) 300 kcmil – (3) 2/0 (2) 250 kcmil – (3) 1/0 540 in.-lb. (61 N•m)
10 (2) 300 kcmil – (3) 2/0 (2) 250 kcmil – (3) 1/0 540 in.-lb. (61 N•m)
11 (4) 300 kcmil – (4) 350 kcmil (4) 250 kcmil – (4) 300 kcmil 540 in.-lb. (61 N•m)
12 (4) 300 kcmil – (4) 350 kcmil (4) 250 kcmil – (4) 300 kcmil 540 in.-lb. (61 N•m)
Flywheel Input (+)3(2) AWG 2/0 (2) AWG 2/0 300 in.-lb. (33.9 N•m)
1 One battery string. (Consult factory if using more than one battery string.)
2 Fastener torque specied for: 1/2 in. diameter grade 5 steel bolt.
3 Per ywheel unit
4 Cable sized for neutral current=1.7Xphase current. Size cable appropriate to actual load type: balanced, unbalanced, non-linear.
TABLE 11.7 RECOMMENDED CABLE SIZE AND FASTENER TORQUE FOR 500 KVA UPS

Bus Number Cable Size (Min-Max) Tightening

Torque1
75 °C Copper Wire 90 °C Copper Wire
1 (3) 250 kcmil – (3) 400 kcmil (3) 4/0 kcmil – (3) 250 kcmil 540 in.-lb. (61 N•m)
2 (3) 250 kcmil – (3) 400 kcmil (3) 4/0 kcmil – (3) 250 kcmil 540 in.-lb. (61 N•m)
3 (3) 250 kcmil – (3) 400 kcmil (3) 4/0 kcmil – (3) 250 kcmil 540 in.-lb. (61 N•m)
4 (3) 400 kcmil – (3) 500 kcmil (4) 400 kcmil – (4) 500 kcmil 540 in.-lb. (61 N•m)
5 (3) 400 kcmil – (3) 500 kcmil (4) 400 kcmil – (4) 500 kcmil 540 in.-lb. (61 N•m)
6 (3) 400 kcmil – (3) 500 kcmil (3) 400 kcmil – (3) 500 kcmil 540 in.-lb. (61 N•m)
72(6) 400 kcmil – (6) 500 kcmil (3) 400 kcmil – (3) 500 kcmil 540 in.-lb. (61 N•m)
831/0 1/0 540 in.-lb. (61 N•m)
9 (3) 400 kcmil – (3) 500 kcmil (3) 400 kcmil – (3) 500 kcmil 540 in.-lb. (61 N•m)
10 (3) 400 kcmil – (3) 500 kcmil (3) 400 kcmil – (3) 500 kcmil 540 in.-lb. (61 N•m)
11 (3) 400 kcmil – (3) 500 kcmil (3) 400 kcmil – (3) 500 kcmil 540 in.-lb. (61 N•m)
122(6) 400 kcmil – (6) 500 kcmil (3) 400 kcmil – (3) 500 kcmil 540 in.-lb. (61 N•m)
13 (3) 400 kcmil – (3) 500 kcmil (3) 400 kcmil – (3) 500 kcmil 540 in.-lb. (61 N•m)
14 (3) 400 kcmil – (3) 500 kcmil (3) 400 kcmil – (3) 500 kcmil 540 in.-lb. (61 N•m)
1 Fastener torque specied for: 1/2 in. diameter grade 5 steel bolt.
2 Cable sized for neutral current=1.7Xphase current. Size cable appropriate to actual load type: balanced, unbalanced, non-linear.
3 Ground cables