Always
O
n UPS Systems
M0703_NX_Series_Operators_Manual
V1.25
2012-06-12 24
Table 2
(See rules 4-004, 8-104, 12-012, 12-2212, 26-000, 26-742, 42-008, and 42-016 and Tables 5A, 5C, 19, and D3)
Allowable Ampacities for Not More Than 3 Copper Conductors in Raceway or Cable
Based on Ambient Temperature of 30°C
Allowable Ampacity
60°C
75°
85-90°C
110°
125°
200°
Types
R90, RW90
T90 NYLON
Paper
Types
TW
Types
RW75
TW75
Mineral-Insulated
Cable**
See
Note
(1)
See
Note
(1)
See
Note
(1)
Size
AWG
kcmil
COPPER
14
15 15 15 30 30 30
12
20 20 20 35 40 40
10
30 30 30 45 50 55
8
40 45 45 60 65 70
6
55 65 65 80 85 95
4 70 85 85 105 115 120
3 80 100 105 120 130 145
2
100 115 120 135 145 165
1
110 130 140 160 170 190
0
125 150 155 190 200 225
00
145 175 185 215 230 250
000
165 200 210 245 265 285
0000
195 230 235 275 310 340
250
215 255 265 315 335
300
240 285 295 345 380
350
260 310 325 390 420
400
280 335 345 420 450
500
320 380 395 470 500
600
355 420 455 525 545
700
385 460 490 560 600
750
400 475 500 580 620
800
410 490 515 600 640
900 435
520
555
1000
455 545 585 680 730
1250 495
590
645
1500
520 625 700 785
1750 545
650
735
2000
560 665 775 840
Col.1 Col.2
Col.3
Col.4 Col.5 Col.6 Col.7
CORRECTION FACTORS
Ambient Temp.
(°C)
For ambient temperatures other than 30°C (86°F), multiply the allowable amperage shown above by the
appropriate factor below
21 - 25
1.08
1.05
1.04 1.08 1.05 1.04
26 - 30
1.00
1.00
1.00 1.00 1.00 1.00
31 - 35
0.91
0.94
0.96 0.91 0.94 0.96
36 - 40
0.82
0.88
0.91 0.82 0.88 0.91
41 - 45
0.71
0.82
0.87 0.71 0.82 0.87
46 - 50
0.58
0.75
0.82 0.58 0.75 0.82
51 - 55
0.41
0.67
0.76 0.41 0.67 0.76
