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SEMI S22-1103a © SEMI 2003, 2005 39 Table A1-2 Conductor Ampacity - Conductor A mpa city 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…

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SEMI S22-1103a © SEMI 2003, 2005 38
APPENDIX 1
NOTICE: The material in this appendix is an official part of SEMI S22 and was approved by full letter ballot
procedures on September 3, 2003.
Table A1-1 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, 30 Deg C ambient temperature.
Standard AWG 30 – 4: 0 percent Derated 1-3 Conductors
0% Derated
1 – 3 Current Carrying Conductors
Wire Size
Cross
Section
Area
Amps per Conductor
#1
Insulation Rating
Single Wire
Bending Space
Protective
Conductor
Wire size
Protective
Conductor
Cross
Section
Area
Metric AWG Sq. mm 60ºC 75ºC 90ºC 105ºC mm Inches Metric AWG Sq. mm
30
0.050 - 0.5 0.8 1 6.4 0.25
30
0.050
28
0.079 - 0.8 1 2 6.4 0.25
28
0.079
26
0.126 - 1 2 3 6.4 0.25
26
0.126
24
0.201 2 2 3 4 6.4 0.25
24
0.201
22
0.318 3 3 5 7 13 0.5
22
0.318
0.50
0.500 5 5 9 11 13 0.5
0.50
0.500
20
0.509 5 5 9 11 13 0.5
20
0.509
0.75
0.75 6 6 12 16 13 0.5
0.75
0.75
18
0.823 7 7 14 18 13 0.5
18
0.823
1.00
1.0 8 8 15 19 19 0.75
1.00
1.0
16
1.31 10 10 18 22 20 0.75
16
1.31
1.50
1.5 11 11 20 24 19 0.75
1.50
1.5
14
2.08 15 15 25 30 20 0.75
14
2.08
2.50
2.5 17 17 27 32 25 1.0
2.50
2.5
12
3.31 20 20 30 35 26 1.0
12
3.31
4.00
4.0 24 24 34 39 25 1.0
4.00
4.0
10
5.26 30 30 40 45 26 1.0
10
5.26
6.00
6.0 32 35 44 49 38 1.5
6.00
6.0
8
8.37 40 50 55 60 39 1.5
10
5.26
10.00
10.0 45 55 62 68 51 2
6.00
6.0
6
13.30 55 65 75 85 51 2
10
5.26
16.00
16.0 60 72 82 92 76 3
10.00
10.0
4
21.15 70 85 95 105 76 3
8
8.37
#1
Ampacity may be limited by terminal temperature rating.
SEMI S22-1103a © SEMI 2003, 2005 39
Table A1-2 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, 30 Deg C ambient temperature.
Standard 25.00 Metric – 600 Kcmil: 0 percent Derated 1-3 Conductors
0% Derated
1 – 3 Current Carrying Conductors
Wire Size
Cross
Section
Area
Amps per Conductor
#1
Insulation Rating
Single Wire
Bending Space
Protective
Conductor
Wire size
Protective
Conductor
Cross
Section
Area
Metric AWG Sq. mm 60ºC 75ºC 90ºC 105ºC mm Inches Metric AWG Sq. mm
25.00
25.0 80 95 105 115 76 3
10.00
10.00
3
26.67 85 100 110 120 76 3
8
8.37
2
33.62 95 115 130 145 89 3.5
6
13.30
35.00
35.0 97 117 133 149 115 4.5
16.00
16.00
1
42.41 110 130 150 170 115 4.5
6
13.30
50.00
50.0 120 144 164 180 140 5.5
16.00
16.00
1/0
53.49 125 150 170 185 140 5.5
6
13.30
2/0
67.43 145 175 195 205 152.4 6
6
13.30
70.00
70.0 148 179 199 210 165 6.5
16.00
16.00
3/0
85.01 165 200 225 240 166 6.5
6
13.30
95.0
95.0 179 214 241 260 178 7
16.00
16.00
4/0
107.2 195 230 260 285 178 7
4
21.15
120.0
120.0 208 246 280 308 216 8.5
25.00
25.00
(250)
126.7 215 255 290 320 216 8.5
4
21.15
150.0
150.0 238 282 317 347 254 10
25.00
25.00
(300)
152.0 240 285 320 350 254 10
4
21.15
(350)
177.4 260 310 350 385 305 12
3
26.67
185.0
185.0 266 317 359 395 305 12
35.00
35.00
(400)
202.7 280 335 380 420 331 13
3
26.67
240.0
240.0 309 367 416 456 331 13
35.00
35.00
(500)
253.4 320 380 430 470 356 14
3
26.67
300.0
300.0 352 416 471 516 381 15
35.00
35.00
(600)
304.0 355 420 475 520 381 15
2
33.62
#1
Ampacity may be limited by terminal temperature rating.
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