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SEMI S22-1103a © SEMI 2003, 2005 41 Table A1-4 (Based on table for calcu lating Conductor Ampacity from Table A1-1&2) Conductor Ampacity - Conductor Ampacity Table for Types TBS, SA , SIS, FEP, FEPB, MI, RHH, RHW -2,…

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SEMI S22-1103a © SEMI 2003, 2005 40
Table A1-3 Derated Amps (Based on table for calculating Conductor Ampacity from Table A1-1&2)
Conductor Ampacity - Conductor Ampacity Table for Types TBS, SA, SIS, FEP, FEPB, MI, RHH, RHW-2,
THHN, THHW, THW-2, THWN-2, USE-2, XHH, XHHW, XHHW-2, ZW-2 or equivalent Insulation - COPPER, 0-
2000 volts
Ampacity based on 75 Deg C Chart for wire from .050 square mm cross section area (30 AWG) to .126 square mm cross
section area (26 AWG) and ampacity based on 60C chart for wire from .201 square mm cross section area (24 AWG) to 4.00
square mm cross section area, ampacity limit due to terminal temperature rating limitation.
90 deg/105 degree C Insulation & 30 deg C ambient temp, derating factor (%), and number of conductors.
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
Standard
Wire Size
Cross
Section
–0% –20% –30% –50% –55% –60% –65%
Single Wire
Bending
Space
Protective
Conductor
Wire size
Protective
Conductor
Cross
Section
Area
Metric AWG Sq. mm 1–3 4–6 7–9 10–20 21–30 31–40 > 40 mm inches Metric AWG Sq. mm
30
0.050 0.5
0.5
0.5
0.5
0.5
0.5
0.25
0.5
0.25
0.25
0.25
0.25
0.25
0.25
6.4 0.25
30
0.050
28
0.079 0.8
0.8
0.8
0.8
0.5
0.8
0.5
0.8
0.25
0.8
0.25
0.8
0.25
0.5
6.4 0.25
28
0.079
26
0.126 1
1
1
1
1
1
1
1
1
1
1
1
0.5
1
6.4 0.25
26
0.126
24
0.201 2
2
2
2
2
2
1
2
1
1
1
1
1
1
6.4 0.25
24
0.201
22
0.318 3
3
3
3
3
3
2
3
2
3
2
2
1
2
13 0.5
22
0.318
0.50
0.500 5
5
5
5
3
3
2
3
2
3
2
2
1
2
13 0.5
0.50
0.500
20
0.509 5
5
5
5
5
5
4
5
4
5
3
4
3
3
13 0.5
20
0.509
0.75
0.75 6
6
6
6
6
6
6
6
5
6
5
6
4
6
13 0.5
0.75
0.75
18
0.823 7
7
7
7
7
7
7
7
6
7
6
7
5
6
13 0.5
18
0.823
1.00
1.00 8
8
8
8
8
8
8
8
7
8
6
8
5
7
19 0.75
1.0
1.0
16
1.31 10
10
10
10
10
10
9
10
8
10
7
9
6
8
20 0.75
16
1.3
1.50
1.50 11
11
11
11
11
11
10
11
9
11
8
10
7
8
19 0.75
1.5
1.5
14
2.08 15
15
15
15
15
15
13
15
11
14
10
12
9
11
20 0.75
14
2.08
2.50
2.50 17
17
17
17
17
17
13
16
12
14
11
13
9
11
25 1.0
2.5
2.5
12
3.31 20
20
20
20
20
20
15
18
14
16
12
14
11
12
26 1.0
12
3.31
4.00
4.00 24
24
24
24
23
24
17
19
15
17
13
15
12
13
25 1.0
4.0
4.0
SEMI S22-1103a © SEMI 2003, 2005 41
Table A1-4 (Based on table for calculating Conductor Ampacity from Table A1-1&2) Conductor Ampacity -
Conductor Ampacity Table for Types TBS, SA, SIS, FEP, FEPB, MI, RHH, RHW-2, THHN, THHW, THW-2,
THWN-2, USE-2, XHH, XHHW, XHHW-2, ZW-2 or equivalent Insulation - COPPER, 0-2000 volts
Ampacity based on 60 Deg C Chart for wire from 5.26 square mm cross section area to 42.41 square mm cross section area (1
AWG) and ampacity based on 75C chart for wire from 50.00 square mm cross section area to 70.00 square mm cross section
area, ampacity limit due to terminal temperature rating limitation.
90 deg/105 degree C Insulation & 30 deg C ambient temp, derating factor (%), and number of conductors.
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
Standard
Wire Size
Cross
Section
–0% –20% –30% –50% –55% –60% –65%
Single Wire
Bending Space
Protective
Conductor
Wire size
Protective
Conductor
Cross
Section
Area
Metric AWG Sq. mm 1–3 4–6 7–9 10–20 21–30 31–40 > 40 mm inches Metric AWG Sq. mm
10
5.26 30
30
30
30
28
30
20
23
18
20
16
18
14
16
26 1.0
10
5.26
6.00
6.00 32
32
32
32
31
32
22
24
20
22
17
19
15
17
38 1.5
6.00
6.00
8
40
40
40
40
39
40
28
30
25
27
22
24
19
21
39 1.5
10
5.26
10.00
10.00 45
45
45
45
43
45
31
34
28
31
25
27
22
24
51 2
6.00
6.00
6
55
55
55
55
53
55
38
43
34
38
30
34
26
30
51 2
8
8.37
16.00
16.00 60
60
60
60
57
60
41
46
37
41
33
37
29
32
76 3
10.00
10.00
4
70
70
70
70
67
70
48
53
43
47
38
42
33
37
77 3
8
8.367
25.00
25.00 80
80
80
80
74
80
53
58
47
52
42
46
37
40
76 3
10.00
10.00
3
26.67 85
85
85
85
77
84
55
60
50
54
44
48
39
42
77 3
8
8.37
2
33.62 95
95
95
95
91
95
65
73
59
65
52
58
46
51
89 3.5
6
13.30
35.00
35.00 97
97
97
97
93
97
67
74
60
67
53
60
47
52
114 4.5
16.00
16.00
1
42.41 110
110
110
110
105
110
75
85
68
77
60
68
53
60
115 4.5
6
13.30
50.00
50.00 120
120
131
144
115
126
82
90
74
81
65
72
57
63
140 5.5
16.00
16.00
1/0
53.49 150
150
136
148
119
130
85
93
77
83
68
74
60
65
140 5.5
6
13.30
2/0
67.43 175
175
156
164
137
144
98
103
88
92
78
82
68
72
152.4 6
6
13.30
70.0
70.0 179
179
160
168
140
147
100
105
90
95
80
84
70
74
165 6.5
16.00
16.00
SEMI S22-1103a © SEMI 2003, 2005 42
Table A1-5 (Based on table for calculating Conductor Ampacity from Table A1-1&2) Conductor Ampacity -
Conductor Ampacity Table for Types TBS, SA, SIS, FEP, FEPB, MI, RHH, RHW-2, THHN, THHW, THW-2,
THWN-2, USE-2, XHH, XHHW, XHHW-2, ZW-2 or equivalent Insulation - COPPER, 0-2000 volts
Ampacity based on 75 Deg C Chart , ampacity limit due to terminal temperature rating limitation.
90 deg/105 degree C Insulation & 30 deg C ambient temp, derating factor (%), and number of conductors.
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
90ºC
105ºC
Standard
Wire Size
Cross
Section
–0% –20% –30% –50% –55% –60% –65%
Single Wire
Bending Space
Protective
Conductor
Wire size
Protective
Conductor
Cross
Section
Area
Metric AWG Sq. mm 1–3 4–6 7–9 10–20 21–30 31–40 > 40 mm inches Metric AWG Sq. mm
3/0
85.01 200
200
180
192
158
168
113
120
101
108
90
96
79
84
166 6.5
6
13.30
95.0
95.0 214
193
208
169
182
120
130
108
117
96
104
84
91
178 7
16.00
4/0
107.2 230
208
228
182
200
130
143
117
128
104
114
91
100
178 7
4
21.15
120.0
120.0 246
224
246
196
215
140
154
126
138
112
123
98
107
216 8.5
25.00
Kcmil
250
126.7 255 232
255
203
224
145
160
131
144
116
128
102
112
216 8.5
4
21.15
150.0
150.0 282
282
253
277
222
242
158
173
142
156
126
138
111
121
254 10
25.00
300
152.0 285 256
280
224
245
160
175
144
158
128
140
112
123
254 10
4
21.15
350
177.4 310 280
308
245
270
175
193
158
173
140
154
123
135
305 12
3
26.67
185.0
317
317
287
316
251
276
179
197
161
177
143
158
125
138
305 12
35.00
400
202.7 335 304
335
266
294
190
210
171
189
152
168
133
147
331 13
3
26.67
240.0
367
367
332
364
291
319
208
228
187
205
166
182
145
159
331 13
35.00
500
253.4 380 344
376
301
329
215
235
194
212
172
188
151
165
356 14
3
26.67
300.0
416
416
376
412
329
361
235
258
212
232
188
206
164
198
381 15
35.00
600
304.0 420 380
416
333
364
238
260
214
234
190
208
166
182
381 15
2
33.62