GE SG 400 Series Installation Manual page 21

NEC SECTION 210-20 (A)
Table 310-16. Allowable Ampacities of Insulated Conductors Rated O Through 2000 Volts, 140°F Trough
194°F (60°C Trough 90°C) Not More than Three Current-Carrying Conductors in Raceway, Cable, or Earth
(Directly Buried), Based on Ambient Temperature of 86°F (30°C).
Size 140°F (60°C)
Types
TW, UF
AWG
or
kcmil
18 ---
---
16
14 20
12 25
30
10
8 40
6 55
4 70
3 85
95
2
1 110
1/0 125
2/0 145
165
3/0
4/0 195
250 215
300 240
260
350
400 280
500 320
600 355
385
700
750 400
800 410
900 435
1000 455
495
1250
1500 520
1750 545
560
2000
Ambient
Temperature
70 – 77°F (21 – 25°C)
79 – 86°F (26 - 30°C)
88 – 95°F (31 - 35°C)
97 – 104°F (36 - 40°C)
106 – 113°F (41 - 45°C)
115 – 122°F (46 - 50°C)
124 – 131°F (51 - 55°C)
Modifications reserved
OPM_SGS_ISG_M40_M50_2US_V021.doc
Temperature Rating of Conductor (See table 310-13)
167°F (75°C) 194°F (90°C)
Types Types
FEPW, RH, RHW, TBS, SA, SIS, FEP,
THHW, THW, FEPB, MI, RHH,
THWN, XHHW, RHW-2, THHN,
USE, ZW THHW, THW-2,
THWN-2, USE-2,
XHH, XHHW,
XHHW-2,ZW-2
COPPER
---
---
20
25
35
50
65
85
100 110
115 130
130 150
150 170
175 195
200 225
230 260
255 290
285 320
310 350
335 380
380 430
420 475
460 520
475 535
490 555
520 585
545 615
590 665
625 705
650 735
665 750
For ambient temperatures other than 86°F (30°C), multiply the allowable ampacities shown above by the
1.08 1.05
1.00 1.00
0.91 0.94
0.82 0.88
0.71 0.82
0.58 0.75
0.41 0.67
140°F (60°C)
Types
TW, UF
ALUMINIUM or COPPER-CLAD ALUMINIUM
14 ---
18 ---
25 ---
30 20
40 25
55 30
75 40
95 55
65
75
85
100
115
130
150
170
190
210
225
260
285
310
320
330
355
375
405
435
455
470
CORRECTION FACTORS
appropriate factor below
1.04 1.08
1.00 1.00
0.96 0.91
0.91 0.82
0.87 0.71
0.82 0.58
0.76 0.41
167°F (75°C) 194°F (90°C)
Types Types
RH, RHW, TBS, SA, SIS,
THHW, THHN, THHW,
THW, THWN, THW-2,
XHHW, USE THWN-2, RHH,
RHW-2, USE-2,
XHH, XHHW,
XHHW-2,
ZW-2
--- ---
--- ---
--- ---
20 25
30 35
40 45
50 60
65 75
75 85
90 100
100 115
120 135
135 150
155 175
180 205
205 230
230 255
250 280
270 305
310 350
340 385
375 420
385 435
395 450
425 480
445 500
485 545
520 585
545 615
560 630
1.05 1.04
1.00 1.00
0.94 0.96
0.88 0.91
0.82 0.87
0.75 0.82
0.67 0.76
Page 21/41
User Manual SG Series 400 & 500 UL S2