Emerson Liebert Npower 30-130 kVA, Installation Manual, Page: 39 / 100

Wiring Inspection 29
Table 3 Table 310-16
Allowable Ampacities of Insulated Conductors Rated 0-2000 Volts, 60° to 90°C (140° to 194°F)
1
Not More than Three Conductors in Raceway or Cable or Earth (Directly Buried), based on Ambient Temperature of 30° (86°F)
Size Temperature Rating of Conductor. See Table 310-13. Size
AWG
kcmil
60°C
(140°F)
75°C
(167°F)
90°C
(194°F)
60°C
(140°F)
75°C
(167°F)
90°C
(194°F)
AWG
kcmil
Types
TW*
UF*
Types
FEPW*,
RH, RHW*,
THHW*,
THW*,
THWN*,
XHHW*,
USE*, ZW*
Types
TBS, SA, SIS
FEP*, FEPB*, MI,
RHH*, RHW-2,
THHN*, THHW*,
THW-2, THWN-2,
USE-2, XHH, XHHW*
XHHW-2, ZW-2
Types
TW*
UF*
Types
RH*, RHW*,
THHW*,
THW*,
THWN*,
XHHW*,
USE*
Types
TBS, SA, SIS,
THHN*, THHW*,
THW-2, THWN-2,
RHH*, RHW-2,
USE-2,
XHH, XHHW*,
XHHW-2, ZW-2
Copper Aluminum or Copper-Clad Aluminum
18
16
14
12
10
8
.......
.......
20†
25†
30
40
.......
.......
20†
25†
35†
50
14
18
25†
30†
40†
55
.......
.......
.......
20†
25
30
.......
.......
.......
20†
30†
40
.......
.......
.......
25†
35†
45
.......
.......
.......
12
10
8
6
4
3
2
1 55
70
85
95
110
65
85
100
115
130
75
95
110
130
150
40
55
65
75
85 50
65
75
90
100
60
75
85
100
115
6
4
3
2
1
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
Ambient
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
.91
.82
.71
.58
.41
.......
.......
.......
1.05
1.00
.94
.88
.82
.75
.67
.58
.33
.......
1.04
1.00
.96
.91
.87
.82
.76
.71
.58
.41
1.08
1.00
.91
.82
.71
.58
.41
.......
.......
.......
1.05
1.00
.94
.88
.82
.75
.67
.58
.33
.......
1.04
1.00
.96
.91
.87
.82
.76
.71
.58
.41
70-77
78-86
87-95
96-104
105-113
114-122
123-131
132-140
141-158
159-176
* Unless otherwise specifically permitted elsewhere in this Code, the overcurrent protection for conductor types marked with an
asterisk (*) shall not exceed 15 amperes for No. 14, 20 amperes for No. 12, and 30 amperes for No. 10 copper; or 15 amperes for
No.12 and 25 amperes for No. 10 aluminum and copper-clad aluminum after any correction factors for ambient temperature and
number of conductors have been applied.
1
Reprinted with permission from NEC 1999, NFPA 70, the National Electrical Code®, Copyright 1998, National Fire Protection
Association, Quincy, MA 02269. This reprinted material is not the complete and official position of the National Fire Protection
Association, on the referenced subject which is represented only by the standard in its entirety.