78 Installation Guide APC Silcon 240-320kW 480V UPS
990-4049
Appendix
1/0
2/0
3/0
4/0
125
145
165
195
150
175
200
230
170
195
225
260
100
115
130
150
120
135
155
180
135
150
175
205
1/0
2/0
3/0
4/0
250
300
350
400
500
215
240
260
280
320
255
285
310
335
380
290
320
350
380
430
170
190
210
225
260
205
230
250
270
310
230
255
280
305
350
250
300
350
400
500
600
700
750
800
900
355
385
400
410
435
420
460
475
490
520
475
520
535
555
585
285
310
320
330
355
340
375
385
395
425
385
420
435
450
480
600
700
750
800
900
1000
1250
1500
1750
2000
455
495
520
545
560
545
590
625
650
665
615
665
705
735
750
375
405
435
455
470
445
485
520
545
560
500
545
585
615
630
1000
1250
1500
1750
2000
CORRECTION FACTORS
Ambi-
ent
Temp.
(°C)
For ambient temperatures other than 30°C (86°F), multiply the allowable
ampacities shown above by the appropriate factor shown below.
Ambient
Temp.
(°F)
21-25
26-30
31-35
36-40
41-45
46-50
51-55
56-60
61-70
71-80
1.08
1.00
0.91
0.82
0.71
0.58
0.41
–
–
–
1.05
1.00
0.94
0.88
0.82
0.75
0.67
0.58
0.33
–
1.04
1.00
0.96
0.91
0.87
0.82
0.76
0.71
0.58
0.41
1.08
1.00
0.91
0.82
0.71
0.58
0.41
–
–
–
1.05
1.00
0.94
0.88
0.82
0.75
0.67
0.58
0.33
-
1.04
1.00
0.96
0.91
0.87
0.82
0.76
0.71
0.58
0.41
70-77
78-86
87-95
96-104
105-113
114-122
123-131
132-140
141-158
159-176
1)Reprinted with permisson of NFPA 70 - 1999, National Electrical Code ®, copyright © 2000. This reprinted material is not
the complete and official position of the NFPA on the referenced subject, which is represented only by the standard in its
entirety.