AMPACITY RATINGS

CURRENT CARRYING CAPACITY TABLE

BASE TEMPERATURE AT 40 C
150 C
Tinned Copper
200 C
Tinned Copper
NPC 2%-10%
250 C
NPC 2%-10%
250 C
"A" Nickel
250 C
NPI
450 C
NPC-27%
450 C
"A" Nickel
24
6.6
7.2
8
4
3.3
9
4.3
22
9
9.6
10.8
5
4.4
12
5.6
20
13
14
15
7
6
18
8
18
17
18
20
9.4
8
23
11
16
22
24
26
12
11
30
14
14
34
36
39
18
16
45
21
12
43
45
54
25
22
56
26
10
55
60
73
34
30
75
35
8
76
83
93
43
39
104
49
6
96
110
117
55
49
138
65
4
120
125
148
69
62
162
76
3
143
152
166
78
69
182
85
2
160
171
191
90
80
210
99
1
186
197
215
101
90
236
110
1/0
215
229
244
114
102
268
126
2/0
251
260
273
128
114
300
141
3/0
288
297
308
144
129
338
159
4/0
332
346
361
169
151
397
186
250
365
385
398
187
167
--
--
300
414
436
452
212
190
--
--
350
461
486
503
236
211
--
--
400
495
522
540
254
226
--
--
500
563
593
613
288
257
--
--

NOTE: For allowable ampacities for fixture wires used in fixtures, see Article 402 and Table 402.5 in 1996 National Electrical Code Handbook.