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Klockner-Moeller
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Allowable
Ampacities of Insulated Conductors
Rated 0 through 2000 Volts,
60° to
90° C |
|
Not more than three
current-carrying conductors in raceway or cable or earth (directly
buried), based on Ambient Temperature of 30 degrees C (86° F) |
| Size |
Temperature Rating of Conductor |
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 1)
UF 1) |
Types
FEPW 1)
RH 1)
RHW 1)
THHW 1)
THW 1)
THWN 1)
XHHW 1)
USE 1)
ZW 1) |
|
Types
TBS
SA
SIS
FEP 1)
FEPB 1)
MI
RHH 1)
RHW-2
THHN 1)
THHW 1)
THW-2 1)
USE-2
XHH
XHHW-2 1)
ZW-2 |
|
|
Types
FEPW 1)
RH 1)
RHW 1)
THHW 1)
THW 1)
THWN 1)
XHHW 1)
USE 1)
ZW 1) |
|
Types
TBS
SA
SIS
FEP 1)
FEPB 1)
MI
RHH 1)
RHW-2
THHN 1)
THHW 1)
THW-2 1)
USE-2
XHH
XHHW-2 1)
ZW-2 |
|
|
Copper |
Aluminum or Copper-clad Aluminum |
| 18 |
-- |
-- |
14 |
-- |
-- |
-- |
-- |
| 16 |
-- |
-- |
18 |
-- |
-- |
-- |
-- |
| 14 |
20 1) |
20 1) |
25 1) |
-- |
-- |
-- |
-- |
| 12 |
25 1) |
25 1) |
30 1) |
20 1) |
20 1) |
25 1) |
12 |
| 10 |
30 |
35 1) |
40 1) |
25 |
30 1) |
35 1) |
10 |
| 8 |
40 |
50 |
55 |
30 |
40 |
45 |
8 |
| 6 |
55 |
65 |
75 |
40 |
50 |
60 |
6 |
| 4 |
70 |
85 |
95 |
55 |
65 |
70 |
4 |
| 3 |
85 |
100 |
110 |
65 |
75 |
85 |
3 |
| 2 |
95 |
1115 |
130 |
75 |
90 |
100 |
2 |
| 1 |
110 |
130 |
150 |
85 |
100 |
115 |
1 |
| 1/0 |
125 |
150 |
170 |
100 |
120 |
135 |
1/0 |
| 2/0 |
145 |
175 |
195 |
115 |
135 |
150 |
2/0 |
| 3/0 |
165 |
200 |
225 |
130 |
155 |
175 |
3/0 |
| 4/0 |
195 |
230 |
260 |
150 |
180 |
205 |
4/0 |
| 250 |
215 |
255 |
290 |
170 |
205 |
230 |
250 |
| 300 |
240 |
285 |
320 |
190 |
230 |
255 |
300 |
| 350 |
260 |
310 |
350 |
210 |
250 |
280 |
350 |
| 400 |
280 |
385 |
380 |
225 |
270 |
305 |
400 |
| 500 |
320 |
380 |
430 |
260 |
310 |
350 |
500 |
| 600 |
355 |
420 |
475 |
285 |
340 |
385 |
600 |
| 700 |
385 |
460 |
520 |
310 |
375 |
420 |
700 |
| 750 |
400 |
475 |
535 |
320 |
385 |
435 |
750 |
| 800 |
410 |
490 |
555 |
330 |
395 |
450 |
800 |
| 900 |
435 |
520 |
585 |
355 |
425 |
480 |
900 |
| 1000 |
455 |
545 |
615 |
375 |
445 |
500 |
1000 |
| 1250 |
495 |
590 |
665 |
405 |
485 |
545 |
1250 |
| 1500 |
520 |
625 |
705 |
435 |
520 |
585 |
1500 |
| 1750 |
545 |
650 |
735 |
455 |
545 |
615 |
1750 |
| 2000 |
560 |
665 |
750 |
470 |
560 |
630 |
2000 |
|
Correction Factor |
| Ambient
Temp ° C |
For ambient temperatures other then 30° C (86°
F), multiply the allowable ampacities shown above by the appropriate
factor shown below. |
Ambient
Temp ° F |
| 21 -
25 |
1.08 |
1.05 |
1.04 |
1.08 |
1.05 |
1.04 |
70 -
77 |
| 26 -
30 |
1.00 |
1.00 |
1.00 |
1.00 |
1.00 |
1.00 |
78 -
86 |
| 31 -
35 |
.91 |
.94 |
.96 |
.91 |
.94 |
.96 |
87 -
95 |
| 36 -
40 |
.82 |
.88 |
.91 |
.91 |
.94 |
.96 |
96 -
104 |
| 41 -
45 |
.71 |
.82 |
.87 |
.71 |
.82 |
.87 |
105
-113 |
| 46 -
50 |
.58 |
.75 |
.82 |
.58 |
.75 |
.82 |
114 -
122 |
| 51 -
55 |
.41 |
.67 |
.76 |
.41 |
.67 |
.76 |
123 -
131 |
| 56 -
60 |
-- |
.58 |
.71 |
-- |
.58 |
.71 |
132 -
140 |
| 61 -
70 |
-- |
.33 |
.58 |
-- |
.33 |
.58 |
141 -
158 |
| 71 -
80 |
-- |
-- |
.41 |
-- |
-- |
.41 |
159 -
176 |
|
1) Unless otherwise
specifically permitted elsewhere in this code, the overcurrent
protection for conductor types marked with 1) 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. |
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