Annex C. Conduit and Tubing Fill Tables for Conductors and Fixture Wires of the Same Size

This Annex is not part of the requirements of the NFPA document but is listed for informational purposes.

Reprinted with permission from NFPA 70-2005, the National Electrical Code®, Copyright © 2004, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the referenced subject which is represented only by the standard in its entirety.

Table

Page

C1Electrical Metallic Tubing (EMT)

305

C1(A)[*]Electrical Metallic Tubing (EMT)

310

C2Electrical Nonmetallic Tubing (ENT)

312

C2(A)[*]Electrical Nonmetallic Tubing (ENT)

317

C3Flexible Metal Conduit (FMC)

319

C3(A)[*]Flexible Metal Conduit (FMC)

324

C4Intermediate Metal Conduit (IMC)

326

C4(A)[*]Intermediate Metal Conduit (IMC)

331

C5Liquidtight Flexible Nonmetallic Conduit (Type LFNC-B)

333

C5(A)[*]Liquidtight Flexible Nonmetallic Conduit (Type LFNC-B)

338

C6Liquidtight Flexible Nonmetallic Conduit (Type LFNC-A)

340

C6(A)[*]Liquidtight Flexible Nonmetallic Conduit (Type LFNC-A)

345

C7Liquidtight Flexible Metal Conduit (LFMC)

347

C7(A)[*]Liquidtight Flexible Metal Conduit (LFMC)

352

C8Rigid Metal Conduit (RMC)

354

C8(A)[*]Rigid Metal Conduit (RMC)

362

C9Rigid PVC Conduit, Schedule 80

365

C9(A)[*]Rigid PVC Conduit, Schedule 80

373

C10Rigid PVC Conduit, Schedule 40 and HDPE Conduit

376

C10(A)[*]Rigid PVC Conduit, Schedule 40 and HDPE Conduit

383

C11Type A, Rigid PVC Conduit

386

C11(A)[*]Type A, Rigid PVC Conduit

391

C12Type EB, PVC Conduit

393

C12(A)[*]Type EB, PVC Conduit

397

[*] Where this table is used in conjunction with Tables C1 through C12, the conductors installed must be of the compact type.

Table C1. Maximum Number of Conductors or Fixture Wires in Electrical Metallic Tubing (EMT) (Based on Table 1, Chapter 9)

[View Full Width]

[*] Types RHH, RHW, and RHW-2 without outer covering.

Fixture Wires

Type

Conductor Size
(AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

FFH-2,

18

8

14

24

41

56

92

RFH-2,

16

7

12

20

34

47

78

RFHH-3

             

SF-2, SFF-2

18

10

18

30

52

71

116

 

16

8

15

25

43

58

96

 

14

7

12

20

34

47

78

SF-1, SFF-1

18

18

33

53

92

125

206

RFH-1,

18

14

24

39

68

92

152

RFHH-2, TF,

             

TFF, XF, XFF

             

RFHH-2, TF,

16

11

19

31

55

74

123

TFF, XF, XFF

             

XF, XFF

14

8

15

25

43

58

96

TFN, TFFN

18

22

38

63

108

148

244

 

16

17

29

48

83

113

186

PF, PFF, PGF,

18

21

36

59

103

140

231

PGFF, PAF,

16

16

28

46

79

108

179

PTF, PTFF,

14

12

21

34

60

81

134

PAFF

             

ZF, ZFF, ZHF,

18

27

47

77

133

181

298

HF, HFF

16

20

35

56

98

133

220

 

14

14

25

41

72

98

161

KF-2, KFF-2

18

39

69

111

193

262

433

 

16

27

48

78

136

185

305

 

14

19

33

54

93

127

209

 

12

13

23

37

64

87

144

 

10

8

15

25

43

58

96

KF-1, KFF-1

18

46

82

133

230

313

516

 

16

33

57

93

161

220

362

 

14

22

38

63

108

148

244

 

12

14

25

41

72

98

161

 

10

9

16

27

47

64

105

XF, XFF

12

4

8

13

23

31

51

 

10

3

6

10

18

24

40

 

Table C1(A). Maximum Number of Compact Conductors in Electrical Metallic Tubing (EMT) (Based on Table 1, Chapter 9)

[View Full Width]

Table C2. Maximum Number of Conductors or Fixture Wires in Electrical Nonmetallic Tubing (ENT) (Based on Table 1, Chapter 9)

Conductors

Type

Conductor
Size
(AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

RHH, RHW,

14

3

6

10

19

26

43

RHW-2

12

2

5

9

16

22

36

10

1

4

7

13

17

29

8

1

1

3

6

9

15

6

1

1

3

5

7

12

4

1

1

2

4

6

9

3

1

1

1

3

5

8

2

0

1

1

3

4

7

1

0

1

1

1

3

5

1/0

0

0

1

1

2

4

2/0

0

0

1

1

1

3

3/0

0

0

1

1

1

3

4/0

0

0

1

1

1

2

250

0

0

0

1

1

1

300

0

0

0

1

1

1

350

0

0

0

1

1

1

400

0

0

0

1

1

1

500

0

0

0

0

1

1

600

0

0

0

0

1

1

700

0

0

0

0

0

1

750

0

0

0

0

0

1

800

0

0

0

0

0

1

900

0

0

0

0

0

1

1000

0

0

0

0

0

1

1250

0

0

0

0

0

0

1500

0

0

0

0

0

0

1750

0

0

0

0

0

0

 

2000

0

0

0

0

0

0

TW

14

7

13

22

40

55

92

 

12

5

10

17

31

42

71

 

10

4

7

13

23

32

52

 

8

1

4

7

13

17

29

RHH[*],

14

4

8

15

27

37

61

RHW[*],

             

RHW-2[*],

             

THHW,

             

THW,

             

THW-2

             

RHH[*],

12

3

7

12

21

29

49

RHW[*],

10

3

5

9

17

23

38

RHW-2[*],

             

THHW, THW

             

RHH[*],

8

1

3

5

10

14

23

RHW[*],

6

1

2

4

7

10

17

RHW-2[*],

4

1

1

3

5

8

13

TW, THW,

3

1

1

2

5

7

11

THHW,

2

1

1

2

4

6

9

THW-2

1

0

1

1

3

4

6

1/0

0

1

1

2

3

5

2/0

0

1

1

1

3

5

3/0

0

0

1

1

2

4

4/0

0

0

1

1

1

3

250

0

0

1

1

1

2

300

0

0

0

1

1

2

350

0

0

0

1

1

1

400

0

0

0

1

1

1

500

0

0

0

1

1

1

600

0

0

0

0

1

1

700

0

0

0

0

1

1

750

0

0

0

0

1

1

800

0

0

0

0

1

1

900

0

0

0

0

0

1

1000

0

0

0

0

0

1

1250

0

0

0

0

0

1

1500

0

0

0

0

0

0

1750

0

0

0

0

0

0

2000

0

0

0

0

0

0

THHN,

14

10

18

32

58

80

132

THWN,

12

7

13

23

42

58

96

THWN-2

10

4

8

15

26

36

60

8

2

5

8

15

21

35

6

1

3

6

11

15

25

4

1

1

4

7

9

15

3

1

1

3

5

8

13

2

1

1

2

5

6

11

1

1

1

1

3

5

8

1/0

0

1

1

3

4

7

2/0

0

1

1

2

3

5

3/0

0

1

1

1

3

4

4/0

0

0

1

1

2

4

250

0

0

1

1

1

3

300

0

0

1

1

1

2

350

0

0

0

1

1

2

400

0

0

0

1

1

1

500

0

0

0

1

1

1

THHN,

600

0

0

0

1

1

1

THWN,

700

0

0

0

0

1

1

THWN-2

750

0

0

0

0

1

1

 

800

0

0

0

0

1

1

 

900

0

0

0

0

1

1

 

1000

0

0

0

0

0

1

FEP, FEPB,

14

10

18

31

56

77

128

PFA, PFAH,

12

7

13

23

41

56

93

TFE

10

5

9

16

29

40

67

8

3

5

9

17

23

38

6

1

4

6

12

16

27

4

1

2

4

8

11

19

3

1

1

4

7

9

16

 

2

1

1

3

5

8

13

PFA, PFAH,

1

1

1

1

4

5

9

TFE

             

PFA, PFAH,

1/0

0

1

1

3

4

7

TFE, Z

2/0

0

1

1

2

4

6

 

3/0

0

1

1

1

3

5

 

4/0

0

1

1

1

2

4

Z

14

12

22

38

68

93

154

12

8

15

27

48

66

109

10

5

9

16

29

40

67

8

3

6

10

18

25

42

6

1

4

7

13

18

30

4

1

3

5

9

12

20

3

1

1

3

6

9

15

2

1

1

3

5

7

12

 

1

1

1

2

4

6

10

XHH,

14

7

13

22

40

55

92

XHHW,

12

5

10

17

31

42

71

XHHW-2,

10

4

7

13

23

32

52

ZW

8

1

4

7

13

17

29

6

1

3

5

9

13

21

4

1

1

4

7

9

15

3

1

1

3

6

8

13

 

2

1

1

2

5

6

11

XHH,

1

1

1

1

3

5

8

XHHW,

1/0

0

1

1

3

4

7

XHHW-2

2/0

0

1

1

2

3

6

3/0

0

1

1

1

3

5

4/0

0

0

1

1

2

4

250

0

0

1

1

1

3

300

0

0

1

1

1

3

350

0

0

1

1

1

2

400

0

0

0

1

1

1

500

0

0

0

1

1

1

600

0

0

0

1

1

1

700

0

0

0

0

1

1

750

0

0

0

0

1

1

800

0

0

0

0

1

1

900

0

0

0

0

1

1

1000

0

0

0

0

0

1

1250

0

0

0

0

0

1

1500

0

0

0

0

0

1

1750

0

0

0

0

0

0

 

2000

0

0

0

0

0

0

Note 1: This table is for concentric stranded conductors only. For compact stranded conductors, Table C2(A) should be used.

Note 2: Two-hour fire-rated RHH cable has ceramifiable insulation, which has much larger diameters than other RHH wires. Consult manufacturer's conduit fill tables.

[*] Types RHH, RHW, and RHW-2 without outer covering.

Fixture Wires

Type

Conductor Size
(AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1½)

41
(1½)

53
(2)

FFH-2,

18

6

12

21

39

53

88

RFH-2,

16

5

10

18

32

45

74

RFHH-3,

             

SF-2,

18

8

15

27

49

67

111

SFF-2

16

7

13

22

40

55

92

 

14

5

10

18

32

45

74

SF-1,

18

15

28

48

86

119

197

SFF-1

             

RFH -1,

18

11

20

35

64

88

145

RFHH -2,

             

TF, TFF,

             

XF, XFF

             

RFHH-2,

16

9

16

29

51

71

117

TF, TFF,

             

XF, XFF

             

XF, XFF

14

7

13

22

40

55

92

TFN,

18

18

33

57

102

141

233

TFFN

16

13

25

43

78

107

178

PF, PFF,

18

17

31

54

97

133

221

PGF,

16

13

24

42

75

103

171

PGFF,

14

10

18

31

56

77

128

PAF, PTF,

             

PTFF,

             

PAFF

             

ZF, ZFF,

18

22

40

70

125

172

285

ZHF, HF,

16

16

29

51

92

127

210

HFF

14

12

22

38

68

93

154

KF-2,

18

31

58

101

182

250

413

KFF-2

16

22

41

71

128

176

291

 

14

15

28

49

88

121

200

 

12

10

19

33

60

83

138

 

10

7

13

22

40

55

92

KF-1,

18

38

69

121

217

298

493

KFF-1

16

26

49

85

152

209

346

 

14

18

33

57

102

141

233

 

12

12

22

38

68

93

154

 

10

7

14

24

44

61

101

XF, XFF

12

3

7

12

21

29

49

 

10

3

5

9

17

23

38

Table C2(A). Maximum Number of Compact Conductors in Electrical Nonmetallic Tubing (ENT) (Based on Table 1, Chapter 9)

Compact Conductors

Type

Conductor Size
(AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

THW,

8

1

3

6

11

15

25

THW-2,

6

1

2

4

8

11

19

THHW

4

1

1

3

6

8

14

2

1

1

2

4

6

10

1

0

1

1

3

4

7

1/0

0

1

1

3

4

6

2/0

0

1

1

2

3

5

3/0

0

1

1

1

3

4

4/0

0

0

1

1

2

4

250

0

0

1

1

1

3

300

0

0

1

1

1

2

350

0

0

0

1

1

2

400

0

0

0

1

1

1

500

0

0

0

1

1

1

600

0

0

0

1

1

1

700

0

0

0

0

1

1

750

0

0

0

0

1

1

900

0

0

0

0

1

1

 

1000

0

0

0

0

0

1

THHN,

8

THWN,

6

1

4

7

12

17

28

THWN-2

4

1

2

4

7

10

17

2

1

1

3

5

7

12

1

1

1

2

4

5

9

1/0

1

1

1

3

5

8

2/0

0

1

1

3

4

6

3/0

0

1

1

2

3

5

4/0

0

1

1

1

2

4

250

0

0

1

1

1

3

300

0

0

1

1

1

3

350

0

0

1

1

1

2

400

0

0

0

1

1

2

500

0

0

0

1

1

1

600

0

0

0

1

1

1

 

700

0

0

0

1

1

1

THHN,

750

0

0

0

1

1

1

THWN,

900

0

0

0

0

1

1

THWN-2

1000

0

0

0

0

1

1

XHHW,

8

2

4

8

14

19

32

XHHW-2

6

1

3

6

10

14

24

4

1

2

4

7

10

17

2

1

1

3

5

7

12

1

1

1

2

4

5

9

1/0

1

1

1

3

5

8

2/0

0

1

1

3

4

7

3/0

0

1

1

2

3

5

4/0

0

1

1

1

3

4

250

0

0

1

1

1

3

300

0

0

1

1

1

3

350

0

0

1

1

1

3

400

0

0

1

1

1

2

500

0

0

0

1

1

1

600

0

0

0

1

1

1

700

0

0

0

1

1

1

750

0

0

0

1

1

1

900

0

0

0

0

1

1

 

1000

0

0

0

0

1

1

Definition: Compact stranding is the result of a manufacturing process where the standard conductor is compressed to the extent that the interstices (voids between strand wires) are virtually climated.

 

Table C3. Maximum Number of Conductors or Fixture Wires in Flexible Metal Conduit (FMC) (Based on Table 1, Chapter 9)

[View Full Width]

[*] Types RHH, RHW, and RHW-2 without outer covering.

Fixture Wires

Type

Conductor Size
(AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1½)

41
(1½)

53
(2)

FFH-2,

18

8

14

22

35

51

90

RFH-2,

16

7

12

19

29

43

76

RFHH-3

             

SF-2,

18

11

18

28

44

64

113

SFF-2

16

9

15

23

36

53

94

 

14

7

12

19

29

43

76

SF-1,

18

19

32

50

78

114

201

SFF-1

             

RFH-1,

18

14

24

37

58

84

148

RFHH-2,

             

TF, TFF,

             

XF, XFF

             

RFHH-2,

16

11

19

30

47

68

120

TF, TFF,

             

XF, XFF

             

XF, XFF

14

9

15

23

36

53

94

TFN,

18

23

38

59

93

135

237

TFFN

16

17

29

45

71

103

181

PF, PFF,

18

22

36

56

88

128

225

PGF,

16

17

28

43

68

99

174

PGFF,

14

12

21

32

51

74

130

PAF, PTF,

             

PTFF,

             

PAFF

             

ZF, ZFF,

18

28

47

72

113

165

290

ZHF, HF,

16

20

35

53

83

121

214

HFF

14

15

25

39

61

89

157

KF-2,

18

41

68

105

164

239

421

KFF-2

16

28

48

74

116

168

297

 

14

19

33

51

80

116

204

 

12

13

23

35

55

80

140

 

10

9

15

23

36

53

94

KF-1,

18

48

82

125

196

285

503

KFF-1

16

34

57

88

138

200

353

 

14

23

38

59

93

135

237

 

12

15

25

39

61

89

157

 

10

10

16

25

40

58

103

XF, XFF

12

5

8

12

19

28

50

 

10

4

6

10

15

22

39

 

Table C3(A). Maximum Number of Compact Conductors in Flexible Metal Conduit (FMC) (Based on Table 1, Chapter 9)

[View Full Width]

Table C4. Maximum Number of Conductors or Fixture Wires in Intermediate Metal Conduit (IMC) (Based on Table 1, Chapter 9)

[View Full Width]

[5] Types RHH, RHW, and RHW-2 without outer covering.

Fixture Wires

Type

Conductor Size
(AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

FHH-2,

18

9

16

26

45

61

100

RFH-2,

16

8

13

22

38

51

84

RFHH-3

             

SF-2,

18

12

20

33

57

77

126

SFF-2

16

10

17

27

47

64

104

 

14

8

13

22

38

51

84

SF-1,

18

21

36

59

101

137

223

SFF-1

             

RFH-1,

18

15

26

43

75

101

165

RFHH-2,

             

TF, TFF,

             

XF, XFF

             

RFH-2,

16

12

21

35

60

81

133

TF, TFF,

             

XF, XFF

             

XF, XFF

14

10

17

27

47

64

104

TFN,

18

25

42

69

119

161

264

TFFN

16

19

32

53

91

123

201

PF, PFF,

18

23

40

66

113

153

250

PGF,

16

18

31

51

87

118

193

PGFF,

14

13

23

38

66

89

145

PAF,

             

PTF,

             

PTFF,

             

PAFF

             

ZF, ZFF,

18

30

52

85

146

197

322

ZHF, HF,

16

22

38

63

108

145

238

HFF

14

16

28

46

79

107

175

KF-2,

18

44

75

123

212

287

468

KFF-2

16

31

53

87

149

202

330

 

14

21

36

60

103

139

227

 

12

14

25

41

70

95

156

 

10

10

17

27

47

64

104

KF-1,

18

52

90

147

253

342

558

KFF-1

16

37

63

103

178

240

392

 

14

25

42

69

119

161

264

 

12

16

28

46

79

107

175

 

10

10

18

30

52

70

114

XF, XFF

12

5

9

14

25

34

56

 

10

4

7

11

19

26

43

 

Table C4(A). Maximum Number of Compact Conductors in Intermediate Metal Conduit (IMC) (Based on Table 1, Chapter 9)

[View Full Width]

Table C5. Maximum Number of Conductors or Fixture Wires in Liquidtight Flexible Nonmetallic Conduit (Type LFNC-B[*]) (Based on Table 1, Chapter 9)

Conductors

Type

Conductor
size
(AWG/kcmil)

Metric Designator (Trade Size)

12
(3/8)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

RHH,

14

2

4

7

12

21

27

44

RHW,

12

1

3

6

10

17

22

36

RHW-2

10

1

3

5

8

14

18

29

 

8

1

1

2

4

7

9

15

 

6

1

1

1

3

6

7

12

 

4

0

1

1

2

4

6

9

 

3

0

1

1

1

4

5

8

 

2

0

1

1

1

3

4

7

 

1

0

0

1

1

1

3

5

 

1/0

0

0

1

1

1

2

4

 

2/0

0

0

1

1

1

1

3

 

3/0

0

0

0

1

1

1

3

 

4/0

0

0

0

1

1

1

2

 

250

0

0

0

0

1

1

1

 

300

0

0

0

0

1

1

1

 

350

0

0

0

0

1

1

1

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

0

1

1

 

700

0

0

0

0

0

0

1

 

750

0

0

0

0

0

0

1

 

800

0

0

0

0

0

0

1

 

900

0

0

0

0

0

0

1

 

1000

0

0

0

0

0

0

1

 

1250

0

0

0

0

0

0

0

 

1500

0

0

0

0

0

0

0

 

1750

0

0

0

0

0

0

0

 

2000

0

0

0

0

0

0

0

TW,

14

5

9

15

25

44

57

93

 

12

4

7

12

19

33

43

71

 

10

3

5

9

14

25

32

53

 

8

1

3

5

8

14

18

29

RHH[],

14

3

6

10

16

29

38

62

RHW[],

           

RHW-2[],

           

THHW,

           

THW,

           

THW-2

               

RHH[],

12

3

5

8

13

23

30

50

RHW[],

10

1

3

6

10

18

23

39

RHW-2[],

           

THHW,

           

THW

               

RHH[],

8

1

1

4

6

11

14

23

RHW[],

             

RHW-2[],

             

THHW,

             

THW,

             

THW-2

               

RHH[],

6

1

1

3

5

8

11

18

RHW[],

4

1

1

1

3

6

8

13

RHW-2[],

3

1

1

1

3

5

7

11

TW,

2

0

1

1

2

4

6

9

THW,

1

0

1

1

1

3

4

7

THHW,

1/0

0

0

1

1

2

3

6

THW-2

2/0

0

0

1

1

2

3

5

 

3/0

0

0

1

1

1

2

4

 

4/0

0

0

0

1

1

1

3

 

250

0

0

0

1

1

1

3

 

300

0

0

0

1

1

1

2

 

350

0

0

0

0

1

1

1

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

0

1

1

 

750

0

0

0

0

0

1

1

 

800

0

0

0

0

0

1

1

 

900

0

0

0

0

0

0

1

 

1000

0

0

0

0

0

0

1

 

1250

0

0

0

0

0

0

1

 

1500

0

0

0

0

0

0

0

 

1750

0

0

0

0

0

0

0

 

2000

0

0

0

0

0

0

0

THHN,

14

8

13

22

36

63

81

133

THWN,

12

5

9

16

26

46

59

97

THWN-2

10

3

6

10

16

29

37

61

 

8

1

3

6

9

16

21

35

 

6

1

2

4

7

12

15

25

 

4

1

1

2

4

7

9

15

 

3

1

1

1

3

6

8

13

 

2

1

1

1

3

5

7

11

 

1

0

1

1

1

4

5

8

THHN,

1/0

0

1

1

1

3

4

7

THWN,

2/0

0

0

1

1

2

3

6

THWN-2

3/0

0

0

1

1

1

3

5

 

4/0

0

0

1

1

1

2

4

 

250

0

0

0

1

1

1

3

 

300

0

0

0

1

1

1

3

 

350

0

0

0

1

1

1

2

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

0

1

1

 

800

0

0

0

0

0

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

0

1

FEP,

14

7

12

21

35

61

79

129

FEPB,

12

5

9

15

25

44

57

94

PFA,

10

4

6

11

18

32

41

68

PFAH,

8

1

3

6

10

18

23

39

TFE

6

1

2

4

7

13

17

27

 

4

1

1

3

5

9

12

19

 

3

1

1

2

4

7

10

16

 

2

1

1

1

3

6

8

13

PFA,

1

0

1

1

2

4

5

9

PFAH,

             

TFE

               

PFA,

1/0

0

1

1

1

3

4

7

PFAH

               

TFE,Z

2/0

0

1

1

1

3

4

6

 

3/0

0

0

1

1

2

3

5

 

4/0

0

0

1

1

1

2

4

Z

14

9

15

26

42

73

95

156

 

12

6

10

18

30

52

67

111

 

10

4

6

11

18

32

41

68

 

8

2

4

7

11

20

26

43

 

6

1

3

5

8

14

18

30

 

4

1

1

3

5

9

12

20

 

3

1

1

2

4

7

9

15

 

2

0

1

1

3

6

7

12

 

1

0

1

1

2

5

6

10

XHH,

14

5

9

15

25

44

57

93

XHHW,

12

4

7

12

19

33

43

71

XHHW-2,

10

3

5

9

14

25

32

53

ZW

8

1

3

5

8

14

18

29

 

6

1

1

3

6

10

13

22

XHH,

4

1

1

2

4

7

9

16

XHHW,

3

1

1

1

3

6

8

13

XHHW-2,

2

1

1

1

3

5

7

11

ZW

               

XHH,

1

0

1

1

1

4

5

8

XHHW,

1/0

0

1

1

1

3

4

7

XHHW-2

2/0

0

0

1

1

2

3

6

 

3/0

0

0

1

1

1

3

5

 

4/0

0

0

1

1

1

2

4

 

250

0

0

0

1

1

1

3

 

300

0

0

0

1

1

1

3

 

350

0

0

0

1

1

1

2

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

0

1

1

 

800

0

0

0

0

0

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

0

1

 

1250

0

0

0

0

0

0

1

 

1500

0

0

0

0

0

0

1

 

1750

0

0

0

0

0

0

0

 

2000

0

0

0

0

0

0

0

Fixture Wires

FFH-2,

18

5

8

15

24

42

54

89

RFH-2

16

4

7

12

20

35

46

75

SF-2,

18

6

11

19

30

53

69

113

SFF-2

16

5

9

15

25

44

57

93

 

14

4

7

12

20

35

46

75

SF-1,

18

11

19

33

53

94

122

199

SFF-1

               

RFH-1,

18

8

14

24

39

69

90

147

RFHH-2,

               

TF, TFF,

               

XF, XFF

               

RFHH-2,

16

7

11

20

32

56

72

119

TF, TFF,

               

XF, XFF

               

XF, XFF

14

5

9

15

25

44

57

93

TFN,

18

14

23

39

63

111

144

236

TFFN

16

10

17

30

48

85

110

180

PF,PFF,

18

13

21

37

60

105

136

223

PGF,

16

10

16

29

46

81

105

173

PGFF,

14

7

12

21

35

61

79

129

PAF,

             

PTF,

             

PTFF,

             

PAFF

               

HF,HFF,

18

17

28

48

77

136

176

288

ZF,ZFF,

16

12

20

35

57

100

129

212

ZHF

14

9

15

26

42

73

95

156

KF-2,

18

24

40

70

112

197

255

418

KFF-2

16

17

28

49

79

139

180

295

 

14

12

19

34

54

95

123

202

 

12

8

13

23

37

65

85

139

 

10

5

9

15

25

44

57

93

KF-1,

18

29

48

83

134

235

304

499

KFF-1

16

20

34

58

94

165

214

350

 

14

14

23

39

63

111

144

236

 

12

9

15

26

42

73

95

156

 

10

6

10

17

27

48

62

102

XF,XFF

12

3

5

8

13

23

30

50

 

10

1

3

6

10

18

23

39

Note 1: This table is for concentric stranded conductors only. For compact stranded conductors, Table C5(A) should be used.

Note 2: Two-hour fire-rated RHH cable has ceramifiable insulation, which has much larger diameters than other RHH wires. Consult manufacturer's conduit fill tables.

[*] Corresponds to 356.2(2).

[images/ent/U2020.GIF border=0>] Types RHH, RHW, and RHW-2 without outer covering.

Table C5(A). Maximum Number of Compact Conductors in Liquidtight Flexible Nonmetallic Conduit (Type LFNC-B[*]) (Based on Table 1, Chapter 9)

Compact Conductors

Type

Conductor
size
(AWG/kcmil)

Metric Designator (Trade Size)

12
(3/8)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

THW,

8

1

2

4

7

12

15

25

THW-2,

6

1

1

3

5

9

12

19

THHW

4

1

1

2

4

7

9

14

 

2

1

1

1

3

5

6

11

 

1

0

1

1

1

3

4

7

 

1/0

0

1

1

1

3

4

6

 

2/0

0

0

1

1

2

3

5

 

3/0

0

0

1

1

1

3

4

 

4/0

0

0

1

1

1

2

4

 

250

0

0

0

1

1

1

3

 

300

0

0

0

1

1

1

2

 

350

0

0

0

1

1

1

2

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

0

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

1

1

THHN,

8

THWN,

6

1

2

4

7

13

17

28

THWN-2

4

1

1

3

4

8

11

17

 

2

1

1

1

3

6

7

12

 

1

0

1

1

2

4

6

9

 

1/0

0

1

1

1

4

5

8

 

2/0

0

1

1

1

3

4

6

 

3/0

0

0

1

1

2

3

5

 

4/0

0

0

1

1

1

3

4

 

250

0

0

1

1

1

1

3

 

300

0

0

0

1

1

1

3

 

350

0

0

0

1

1

1

2

 

400

0

0

0

1

1

1

2

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

1

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

1

1

XHHW,

8

1

3

5

9

15

20

33

XHHW-2

6

1

2

4

6

11

15

24

 

4

1

1

3

4

8

11

17

 

2

1

1

1

3

6

7

12

 

1

0

1

1

2

4

6

9

XHHW,

1/0

0

1

1

1

4

5

8

XHHW-2

2/0

0

1

1

1

3

4

7

 

3/0

0

0

1

1

2

3

5

 

4/0

0

0

1

1

1

3

4

 

250

0

0

1

1

1

1

3

 

300

0

0

0

1

1

1

3

 

350

0

0

0

1

1

1

3

 

400

0

0

0

1

1

1

2

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

1

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

1

1

Definition: Compact stranding is the result of a manufacturing process where the standard conductor is compressed to the extent that the interstices (voids between strand wires) are virtually eliminated.

[*] Corresponds to 356.2(2).

Table C6. Maximun Number of Conductors or Fixture Wires in Liquidtight Flexible Nonmetallic Conduit (Type LFNC-A[*]) (Based on Table 1, Chapter 9)

Conductors

Type

Conductor size
(AWG/kcmil)

Metric Designator (Trade Size)

12
(3/8)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

RHH,

14

2

4

7

11

20

27

45

RHW,

12

1

3

6

9

17

23

38

RHW-2

10

1

3

5

8

13

18

30

 

8

1

1

2

4

7

9

16

 

6

1

1

1

3

5

7

13

 

4

0

1

1

2

4

6

10

 

3

0

1

1

1

4

5

8

 

2

0

1

1

1

3

4

7

 

1

0

0

1

1

1

3

5

 

1/0

0

0

1

1

1

2

4

 

2/0

0

0

1

1

1

1

4

 

3/0

0

0

0

1

1

1

3

 

4/0

0

0

0

1

1

1

3

 

250

0

0

0

0

1

1

1

 

300

0

0

0

0

1

1

1

 

350

0

0

0

0

1

1

1

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

0

1

1

 

600

0

0

0

0

0

1

1

 

700

0

0

0

0

0

0

1

 

750

0

0

0

0

0

0

1

 

800

0

0

0

0

0

0

1

 

900

0

0

0

0

0

0

1

 

1000

0

0

0

0

0

0

1

 

1250

0

0

0

0

0

0

0

 

1500

0

0

0

0

0

0

0

 

1750

0

0

0

0

0

0

0

 

2000

0

0

0

0

0

0

0

TW

14

5

9

15

24

43

58

96

 

12

4

7

12

19

33

44

74

 

10

3

5

9

14

24

33

55

 

8

1

3

5

8

13

18

30

RHH[],

14

3

6

10

16

28

38

64

RHW[],

               

RHW-2[],

               

THHW,

               

THW,

               

THW-2

               

RHH[],

12

3

4

8

13

23

31

51

RHW[],

10

1

3

6

10

18

24

40

RHW-2[],

               

THHW,

               

THW

               

RHH[],

8

1

1

4

6

10

14

24

RHW[],

               

RHW-2[],

               

THHW,

               

THW,

               

THW-2

               

RHH[],

6

1

1

3

4

8

11

18

RHW[],

4

1

1

1

3

6

8

13

RHW-2[],

3

1

1

1

3

5

7

11

TW,THW,

2

0

1

1

2

4

6

10

THHW,

1

0

1

1

1

3

4

7

THW-2

               
 

1/0

0

0

1

1

2

3

6

 

2/0

0

0

1

1

1

3

5

 

3/0

0

0

1

1

1

2

4

 

4/0

0

0

0

1

1

1

3

 

250

0

0

0

1

1

1

3

 

300

0

0

0

1

1

1

2

 

350

0

0

0

0

1

1

1

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

0

1

1

 

750

0

0

0

0

0

1

1

 

800

0

0

0

0

0

1

1

 

900

0

0

0

0

0

0

1

 

1000

0

0

0

0

0

0

1

 

1250

0

0

0

0

0

0

1

 

1500

0

0

0

0

0

0

1

 

1750

0

0

0

0

0

0

0

 

2000

0

0

0

0

0

0

0

THHN,

14

8

13

22

35

62

83

137

THWN,

12

5

9

16

25

45

60

100

THWN-2

10

3

6

10

16

28

38

63

 

8

1

3

6

9

16

22

36

 

6

1

2

4

6

12

16

26

 

4

1

1

2

4

7

9

16

 

3

1

1

1

3

6

8

13

 

2

1

1

1

3

5

7

11

 

1

0

1

1

1

4

5

8

 

1/0

0

1

1

1

3

4

7

 

2/0

0

0

1

1

2

3

6

 

3/0

0

0

1

1

1

3

5

 

4/0

0

0

1

1

1

2

4

THHN,

250

0

0

0

1

1

1

3

THWN,

300

0

0

0

1

1

1

3

THWN-2

350

0

0

0

1

1

1

2

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

0

1

1

 

800

0

0

0

0

0

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

0

1

FEP,

14

7

12

21

34

60

80

133

FEPB,

12

5

9

15

25

44

59

97

PFA,

10

4

6

11

18

31

42

70

PFAH,

8

1

3

6

10

18

24

40

TFE

6

1

2

4

7

13

17

28

 

4

1

1

3

5

9

12

20

 

3

1

1

2

4

7

10

16

 

2

1

1

1

3

6

8

13

PFA,

1

0

1

1

2

4

5

9

PFAH,

               

TFE

               

PFA,

1/0

0

1

1

1

3

5

8

PFAH,

2/0

0

1

1

1

3

4

6

TFE,Z

3/0

0

0

1

1

2

3

5

 

4/0

0

0

1

1

1

2

4

Z

14

9

15

25

41

72

97

161

 

12

6

10

18

29

51

69

114

 

10

4

6

11

18

31

42

70

 

8

2

4

7

11

20

26

44

 

6

1

3

5

8

14

18

31

 

4

1

1

3

5

9

13

21

 

3

1

1

2

4

7

9

15

 

2

1

1

1

3

6

8

13

 

1

1

1

1

2

4

6

10

XHH,

14

5

9

15

24

43

58

96

XHHW,

12

4

7

12

19

33

44

74

XHHW-2,

10

3

5

9

14

24

33

55

ZW

8

1

3

5

8

13

18

30

 

6

1

1

3

5

10

13

22

 

4

1

1

2

4

7

10

16

 

3

1

1

1

3

6

8

14

 

2

1

1

1

3

5

7

11

XHH,

1

0

1

1

1

4

5

8

XHHW,

1/0

0

1

1

1

3

4

7

XHHW-2

2/0

0

0

1

1

2

3

6

 

3/0

0

0

1

1

1

3

5

 

4/0

0

0

1

1

1

2

4

 

250

0

0

0

1

1

1

3

 

300

0

0

0

1

1

1

3

 

350

0

0

0

1

1

1

2

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

0

1

1

 

800

0

0

0

0

0

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

0

1

 

1250

0

0

0

0

0

0

1

 

1500

0

0

0

0

0

0

1

 

1750

0

0

0

0

0

0

0

 

2000

0

0

0

0

0

0

0

Fixture Wires

FFH-2,

18

5

8

14

23

41

55

92

RFH-2

16

4

7

12

20

35

47

77

SF-2,

18

6

11

18

29

52

70

116

SFF-2

16

5

9

15

24

43

58

96

 

14

4

7

12

20

35

47

77

SF-1,

18

12

19

33

52

92

124

205

SFF-1

               

RFH-1,

18

8

14

24

39

68

91

152

RFHH-2,

               

TF,TFF,

               

XF,XFF

               

RFHH-2,

16

7

11

19

31

55

74

122

TF,TFF,

               

XF,XFF

               

XF,XFF

14

5

9

15

24

43

58

96

TFN,TFFN

18

14

22

39

62

109

146

243

 

16

10

17

29

47

83

112

185

PF,PFF,

18

13

21

37

59

103

139

230

PGF,

16

10

16

28

45

80

107

178

PGFF,

14

7

12

21

34

60

80

133

PAF,PTF,

               

PTFF,

               

PAFF

               

HF,HFF,

18

17

27

47

76

133

179

297

ZF,ZFF,

16

12

20

35

56

98

132

219

ZHF

14

9

15

25

41

72

97

161

KF-2,

18

25

40

69

110

193

260

431

KFF-2

16

17

28

48

77

136

183

303

 

14

12

19

33

53

94

126

209

 

12

8

13

23

36

64

86

143

 

10

5

9

15

24

43

58

96

KF-1,

18

29

48

82

131

231

310

514

KFF-1

16

21

33

57

92

162

218

361

 

14

14

22

39

62

109

146

243

 

12

9

15

25

41

72

97

161

 

10

6

10

17

27

47

63

105

XF,XFF

12

3

4

8

13

23

31

51

 

10

1

3

6

10

18

24

40

Note 1: This table is for concentric stranded conductors only. For compact stranded conductors, Table C6(A) should be used.

Note 2: Two-hour fire-rated RHH cable has ceramifiable insulation, which has much larger diameters than other RHH wires. Consult manufacturer's conduit fill tables.

[*] Corresponds to 356.2(1).

[images/ent/U2020.GIF border=0>] Types RHH, RHW, and RHW-2 without outer covering.

Table C6(A). Maximum Number of Compact Conductors in Liquidtight Flexible Nonmetallic Conduit (Type LFNC-A[*]) (Based on Table 1, Chapter 9)

Compact Conductors

Type

Conductor size
(AWG/kcmil)

Metric Designator (Trade Size)

12
(3/8)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

THW,

8

1

2

4

6

11

16

26

THW-2,

6

1

1

3

5

9

12

20

THHW

4

1

1

2

4

7

9

15

 

2

1

1

1

3

5

6

11

 

1

0

1

1

1

3

4

8

 

1/0

0

1

1

1

3

4

7

 

2/0

0

0

1

1

2

3

5

 

3/0

0

0

1

1

1

3

5

 

4/0

0

0

1

1

1

2

4

 

250

0

0

0

1

1

1

3

 

300

0

0

0

1

1

1

3

 

350

0

0

0

1

1

1

2

 

400

0

0

0

0

1

1

1

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

0

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

1

1

THHN,

8

THWN,

6

1

2

4

7

13

18

29

THWN-2

4

1

1

3

4

8

11

18

 

2

1

1

1

3

6

8

13

 

1

0

1

1

2

4

6

10

 

1/0

0

1

1

1

3

5

8

 

2/0

0

1

1

1

3

4

7

 

3/0

0

0

1

1

2

3

6

 

4/0

0

0

1

1

1

3

5

 

250

0

0

1

1

1

1

3

 

300

0

0

0

1

1

1

3

 

350

0

0

0

1

1

1

3

 

400

0

0

0

1

1

1

2

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

1

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

1

1

XHHW,

8

1

3

5

8

15

20

34

XHHW-2

6

1

2

4

6

11

15

25

 

4

1

1

3

4

8

11

18

 

2

1

1

1

3

6

8

13

 

1

0

1

1

2

4

6

10

 

1/0

0

1

1

1

3

5

8

 

2/0

0

1

1

1

3

4

7

 

3/0

0

0

1

1

2

3

6

 

4/0

0

0

1

1

1

3

5

 

250

0

0

1

1

1

2

4

 

300

0

0

0

1

1

1

3

 

350

0

0

0

1

1

1

3

 

400

0

0

0

1

1

1

2

 

500

0

0

0

0

1

1

1

 

600

0

0

0

0

1

1

1

 

700

0

0

0

0

1

1

1

 

750

0

0

0

0

1

1

1

 

900

0

0

0

0

0

1

1

 

1000

0

0

0

0

0

1

1

Definition: Compact stranding is the result of a manufacturing process where the standard conductor is compressed to the extent that the interstices (voids between strand wires) are virtually eliminated.

[*] Corresponds to 356.2(1).

Table C7. Maximum Number of Conductors or Fixture Wires in Liquidtight Flexible Metal Conduit (LFMC) (Based on Table 1, Chapter 9)

[View Full Width]

[*] Types RHH, RHW, and RHW-2 without outer covering.

Fixture Wires

Type

Conductor size
(AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

FFH-2,

18

8

15

24

42

54

89

RFH-2,

16

7

12

20

35

46

75

RFHH-3

             

SF-2,

18

11

19

30

53

69

113

SFF-2

16

9

15

25

44

57

93

 

14

7

12

20

35

46

75

SF-1,

18

19

33

53

94

122

199

SFF-1

             

RFH -1,

18

14

24

39

69

90

147

RFHH-2,

             

TF,TFF,

             

XF, XFF

             

RFHH-2,

16

11

20

32

56

72

119

TF,TFF,

             

XF, XFF

             

XF,XFF

14

9

15

25

44

57

93

TFN,

18

23

39

63

111

144

236

TFFN

16

17

30

48

85

110

180

PF,PFF,

18

21

37

60

105

136

223

PGF,

16

16

29

46

81

105

173

PGFF,

14

12

21

35

61

79

129

PAF,

             

PTF,

             

PTFF,

             

PAFF

             

HF,HFF,

18

28

48

77

136

176

288

ZF,ZFF,

16

20

35

57

100

129

212

ZHF

14

15

26

42

73

95

156

KF-2,

18

40

70

112

197

255

418

KFF-2

16

28

49

79

139

180

295

 

14

19

34

54

95

123

202

 

12

13

23

37

65

85

139

 

10

9

15

25

44

57

93

KF-1,

18

48

83

134

235

304

499

KFF-1

16

34

58

94

165

214

350

 

14

23

39

63

111

144

236

 

12

15

26

42

73

95

156

 

10

10

17

27

48

62

102

XF,

12

5

8

13

23

30

50

XFF

10

3

6

10

18

23

39

 

Table C7(A). Maximum Number of Compact Conductors in Liquidtight Flexible Metal Conduit (LFMC) (Based on Table 1, Chapter 9)

[View Full Width]

Table C8. Maximum Number of Conductors or Fixture Wires in Rigid Metal Conduit (RMC) (Based on Table 1, Chapter 9)

[View Full Width]

[*] Types RHH, RHW, and RHW-2 without outer covering.

Fixture Wires

Type

Conductor Size (AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

FFH-2,

18

8

15

24

42

57

94

RFH-2,

16

7

12

20

35

48

79

RFHH-3

             

SF-2,

18

11

19

31

53

72

118

SFF-2

16

9

15

25

44

59

98

 

14

7

12

20

35

48

79

SF-1,

18

19

33

54

94

127

209

SFF-1

             

RFH-1,

18

14

25

40

69

94

155

RFHH-2,

             

TF, TFF,

             

XF, XFF

             

RFHH-2,

16

11

20

32

56

76

125

TF, TFF,

             

XF, XFF

             

XF, XFF

14

9

15

25

44

59

98

TFN,

18

23

40

64

111

150

248

TFFN

16

17

30

49

84

115

189

PF, PFF,

18

21

38

61

105

143

235

PGF,

16

16

29

47

81

110

181

PGFF,

14

12

22

35

61

83

136

PAF, PTF,

             

PTFF,

             

PAFF

             

HF,

18

28

48

79

135

184

303

HFF, ZF,

16

20

36

58

100

136

223

ZFF, ZHF

14

15

26

42

73

100

164

KF-2,

18

40

71

114

197

267

439

KFF-2

16

28

50

80

138

188

310

 

14

19

34

55

95

129

213

 

12

13

23

38

65

89

146

 

10

9

15

25

44

59

98

KF-1,

18

48

84

136

235

318

524

KFF-1

16

34

59

96

165

224

368

 

14

23

40

64

111

150

248

 

12

15

26

42

73

100

164

 

10

10

17

28

48

65

107

XF,

12

5

8

13

23

32

52

XFF

10

3

6

10

18

25

41

 

Table C8(A). Maximum Number of Compact Conductors in Rigid Metal Conduit (RMC) (Based on Table 1, Chapter 9)

[View Full Width]

Table C9. Maximum Number of Conductors or Fixture Wires in Rigid PVC Conduit, Schedule 80 (Based on Table 1, Chapter 9)

[View Full Width]

[*] Types RHH, RHW, and RHW-2 without outer covering.

Fixture Wires

Type

Conductor Size (AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

FFH-2,

18

6

11

19

34

47

79

RFH-2,

16

5

9

16

28

39

67

RFHH-3

             

SF-2,

18

7

14

24

43

59

100

SFF-2

16

6

11

20

35

49

82

 

14

5

9

16

28

39

67

SF-1,

18

13

25

42

76

105

177

SFF-1

             

RFH-1,

18

10

18

31

56

77

130

RFHH-2,

             

TF, TFF,

             

XF, XFF

             

RFHH-2,

16

8

15

25

45

62

105

TF, TFF,

             

XF, XFF

             

XF, XFF

14

6

11

20

35

49

82

TFN,

18

16

29

50

90

124

209

TFFN

16

12

22

38

68

95

159

PF, PFF,

18

15

28

47

85

118

198

PGF,

16

11

22

36

66

91

153

PGFF,

14

8

16

27

49

68

115

PAF,

             

PTF,

             

PTFF,

             

PAFF

             

HF, HFF,

18

19

36

61

110

152

255

ZF, ZFF,

16

14

27

45

81

112

188

ZHF

14

10

19

33

59

82

138

KF-2,

18

28

53

88

159

220

371

KFF-2

16

19

37

62

112

155

261

 

14

13

25

43

77

107

179

 

12

9

17

29

53

73

123

 

10

6

11

20

35

49

82

KF-1,

18

33

63

106

190

263

442

KFF-1

16

23

44

74

133

185

310

 

14

16

29

50

90

124

209

 

12

10

19

33

59

82

138

 

10

7

13

21

39

54

90

XF, XFF

12

3

6

10

19

26

44

 

10

2

5

8

15

20

34

Note 1: This table is for concentric stranded conductors only. For compact stranded conductors, Table C9(A) should be used.

Note 2: Two-hour fire-rated RHH cable has ceramifiable insulation, which has much larger diameters than other RHH wires. Consult manufacturer's conduit fill tables.

 

Table C9(A). Maximum Number of Compact Conductors in Rigid PVC Conduit, Schedule 80 (Based on Table 1, Chapter 9)

[View Full Width]

Table C10. Maximum Number of Conductors or Fixture Wires in Rigid PVC Conduit, Schedule 40 and HDPE Conduit (Based on Table 1, Chapter 9)

[View Full Width]

[*] Types RHH, RHW, and RHW-2 without outer covering.

Fixture Wires

Type

Conductor Size (AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

FFH-2,

18

8

14

23

40

54

90

RFH-2,

16

6

12

19

33

46

76

RFHH-3

             

SF-2,

18

10

17

29

50

69

114

SFF-2

16

8

14

24

42

57

94

 

14

6

12

19

33

46

76

SF-1,

18

17

31

51

89

122

202

SFF-1

             

RFHH-2,

18

13

23

38

66

90

149

TF, TFF,

             

XF, XFF,

             

RFH-1

             

RFFH-2,

16

10

18

30

53

73

120

TF, TFF,

             

XF, XFF

             

XF, XFF

14

8

14

24

42

57

94

TFN,

18

20

37

60

105

144

239

TFFN

16

16

28

46

80

110

183

PF, PFF,

18

19

35

57

100

137

227

PGF,

16

15

27

44

77

106

175

PGFF,

14

11

20

33

58

79

131

PAF, PTF,

             

PTFF,

             

PAFF

             

HF, HFF,

18

25

45

74

129

176

292

ZF, ZFF,

16

18

33

54

95

130

216

ZHF

14

13

24

40

70

95

158

KF-2,

18

36

65

107

187

256

424

KFF-2

16

26

46

75

132

180

299

 

14

17

31

52

90

124

205

 

12

12

22

35

62

85

141

 

10

8

14

24

42

57

94

KF-1,

18

43

78

128

223

305

506

KFF-1

16

30

55

90

157

214

355

 

14

20

37

60

105

144

239

 

12

13

24

40

70

95

158

 

10

9

16

26

45

62

103

XF, XFF

12

4

8

12

22

30

50

 

10

3

6

10

17

24

39

 

Table C10(A). Maximum Number of Compact Conductors in Rigid PVC Conduit, Schedule 40 and HDPE Conduit (Based on Table 1, Chapter 9)

[View Full Width]

Table C11. Maximum Number of Conductors or Fixture Wires in Type A, Rigid PVC Conduit (Based on Table 1, Chapter 9)

[View Full Width]

[*] Types RHH, RHW, and RHW-#2 without outer covering.

Fixture Wires

Type

Conductor Size
(AWG/kcmil)

Metric Designator (Trade Size)

16
(½)

21
(¾)

27
(1)

35
(1¼)

41
(1½)

53
(2)

FFH-2,

18

10

18

30

48

64

100

RFH-2,

16

9

15

25

41

54

85

RFHH-3

             

SF-2,

18

13

22

37

61

81

127

SFF-2

16

11

18

31

51

67

105

 

14

9

15

25

41

54

85

SF-1,

18

23

40

66

108

143

224

SFF-1

             

RFH-1,

18

17

29

49

80

105

165

RFHH-2,

             

TF, TFF,

             

XF, XFF

             

RFHH-2,

16

14

24

39

65

85

134

TF, TFF,

             

XF, XFF

             

XF,XFF

14

11

18

31

51

67

105

TFN,

18

28

47

79

128

169

265

TFFN

16

21

36

60

98

129

202

PF,PFF,

18

26

45

74

122

160

251

PGF,

16

20

34

58

94

124

194

PGFF,

14

15

26

43

70

93

146

PAF,

             

PTF,

             

PTFF,

             

PAFF

             

HF, HFF,

18

34

58

96

157

206

324

ZF, ZFF,

16

25

42

71

116

152

239

ZHF

14

18

31

52

85

112

175

KF-2,

18

49

84

140

228

300

470

KFF-2

16

35

59

98

160

211

331

 

14

24

40

67

110

145

228

 

12

16

28

46

76

100

157

 

10

11

18

31

51

67

105

KF-1,

18

59

100

167

272

357

561

KFF-1

16

41

70

117

191

251

394

 

14

28

47

79

128

169

265

 

12

18

31

52

85

112

175

 

10

12

20

34

55

73

115

XF,XFF

12

6

10

16

27

35

56

 

10

4

8

13

21

28

44

 

Table C11(A). Maximum Number of Compact Conductors in Type A, Rigid PVC Conduit (Based on Table 1, Chapter 9)

[View Full Width]

Table C12. Maximum Number of Conductors in Type EB, PVC Conduit (Based on Table 1, Chapter 9)

Conductors

Type

Conductor Size (AWG/kcmil)

Metric Designator (Trade Size)

53
(2)

78
(3)

91
(3½)

103
(4)

129
(5)

155
(6)

RHH,

14

53

119

155

197

303

430

RHW,

12

44

98

128

163

251

357

RHW-2

10

35

79

104

132

203

288

8

18

41

54

69

106

151

6

15

33

43

55

85

121

4

11

26

34

43

66

94

3

10

23

30

38

58

83

2

9

20

26

33

50

72

1

6

13

17

21

33

47

1/0

5

11

15

19

29

41

2/0

4

10

13

16

25

36

3/0

4

8

11

14

22

31

4/0

3

7

9

12

18

26

250

2

5

7

9

14

20

300

1

5

6

8

12

17

350

1

4

5

7

11

16

400

1

4

5

6

10

14

500

1

3

4

5

9

12

600

1

3

3

4

7

10

700

1

2

3

4

6

9

750

1

2

3

4

6

9

800

1

2

3

4

6

8

900

1

1

2

3

5

7

1000

1

1

2

3

5

7

1250

1

1

1

2

3

5

1500

0

1

1

1

3

4

1750

0

1

1

1

3

4

 

2000

0

1

1

1

2

3

TW

14

111

250

327

415

638

907

 

12

85

192

251

319

490

696

 

10

63

143

187

238

365

519

 

8

35

79

104

132

203

288

RHH[1],

14

74

166

217

276

424

603

RHW[1],

             

RHW-2[1],

             

THHW,

             

THW,

             

THW-2

             

RHH[1],

12

59

134

175

222

341

485

RHW[1],

10

46

104

136

173

266

378

RHW-2[1],

             

THHW,

             

THW

             

RHH[1],

8

28

62

81

104

159

227

RHW[1],

6

21

48

62

79

122

173

RHW-2[1],

4

16

36

46

59

91

129

TW,

3

13

30

40

51

78

111

THW,

2

11

26

34

43

66

94

THHW,

1

8

18

24

30

46

66

THW-2

1/0

7

15

20

26

40

56

2/0

6

13

17

22

34

48

3/0

5

11

14

18

28

40

4/0

4

9

12

15

24

34

250

3

7

10

12

19

27

300

3

6

8

11

17

24

350

2

6

7

9

15

21

400

2

5

7

8

13

19

500

1

4

5

7

11

16

600

1

3

4

6

9

13

700

1

3

4

5

8

11

750

1

3

4

5

7

11

800

1

3

3

4

7

10

900

1

2

3

4

6

9

1000

1

2

3

4

6

8

1250

1

1

2

3

4

6

1500

1

1

1

2

4

6

1750

1

1

1

2

3

5

 

2000

0

1

1

1

3

4

THHN,

14

159

359

468

595

915

1300

THWN,

12

116

262

342

434

667

948

THWN-2

10

73

165

215

274

420

597

8

42

95

124

158

242

344

6

30

68

89

114

175

248

4

19

42

55

70

107

153

3

16

36

46

59

91

129

2

13

30

39

50

76

109

1

10

22

29

37

57

80

1/0

8

18

24

31

48

68

2/0

7

15

20

26

40

56

3/0

5

13

17

21

33

47

4/0

4

10

14

18

27

39

250

4

8

11

14

22

31

300

3

7

10

12

19

27

350

3

6

8

11

17

24

400

2

6

7

10

15

21

 

500

1

5

6

8

12

18

THHN,

600

1

4

5

6

10

14

THWN,

700

1

3

4

6

9

12

THWN-2

750

1

3

4

5

8

12

 

800

1

3

4

5

8

11

 

900

1

3

3

4

7

10

 

1000

1

2

3

4

6

9

FEP,

14

155

348

454

578

888

1261

FEPB,

12

113

254

332

422

648

920

PFA,

10

81

182

238

302

465

660

PFAH,

8

46

104

136

173

266

378

TFE

6

33

74

97

123

189

269

 

4

23

52

68

86

132

188

 

3

19

43

56

72

110

157

 

2

16

36

46

59

91

129

PFA,

1

11

25

32

41

63

90

PFAH,

             

TFE

             

PFA,

1/0

9

20

27

34

53

75

PFAH,

2/0

7

17

22

28

43

62

TFE, Z

3/0

6

14

18

23

36

51

 

4/0

5

11

15

19

29

42

Z

14

186

419

547

696

1069

1519

12

132

297

388

494

759

1078

10

81

182

238

302

465

660

8

51

115

150

191

294

417

6

36

81

105

134

206

293

4

24

55

72

92

142

201

3

18

40

53

67

104

147

2

15

34

44

56

86

122

 

1

12

27

36

45

70

99

XHH,

14

111

250

327

415

638

907

XHHW,

12

85

192

251

319

490

696

XHHW-2,

10

63

143

187

238

365

519

ZW

8

35

79

104

132

203

288

6

26

59

77

98

150

213

4

19

42

56

71

109

155

3

16

36

47

60

92

131

2

13

30

39

50

77

110

XHH,

1

10

22

29

37

58

82

XHHW,

1/0

8

19

25

31

48

69

XHHW-2

2/0

7

16

20

26

40

57

3/0

6

13

17

22

33

47

4/0

5

11

14

18

27

39

250

4

9

11

15

22

32

300

3

7

10

12

19

28

350

3

6

9

11

17

24

400

2

6

8

10

15

22

500

1

5

6

8

12

18

600

1

4

5

6

10

14

700

1

3

4

6

9

12

750

1

3

4

5

8

12

800

1

3

4

5

8

11

900

1

3

3

4

7

10

1000

1

2

3

4

6

9

1250

1

1

2

3

5

7

1500

1

1

1

3

4

6

1750

1

1

1

2

4

5

 

2000

0

1

1

1

3

5

Note 1: This table is for concentric stranded conductors only. For compact stranded conductors, Table C12(A) should be used.

Note 2: Two-hour fire-rated RHH cable has ceramifiable insulation, which has much larger diameters than other RHH wires. Consult manufacturer's conduit fill tables.

[1] Types RHH, RHW, and RHW-2 without outer covering.

Table C12(A). Maximum Number of Compact Conductors in Type EB, PVC Conduit (Based on Table 1, Chapter 9)

Compact Conductors

Type

Conductor Size (AWG/kcmil)

Metric Designator (Trade Size)

53
(2)

78
(3)

91
(3½)

103
(4)

129
(5)

155
(6)

THW,

8

30

68

89

113

174

247

THW-2,

6

23

52

69

87

134

191

THHW

4

17

39

51

65

100

143

 

2

13

29

38

48

74

105

 

1

9

20

26

34

52

74

 

1/0

8

17

23

29

45

64

 

2/0

6

15

19

24

38

54

 

3/0

5

12

16

21

32

46

 

4/0

4

10

14

17

27

38

 

250

3

8

11

14

21

30

 

300

3

7

9

12

19

26

 

350

3

6

8

11

17

24

 

400

2

6

7

10

15

21

 

500

1

5

6

8

12

18

 

600

1

4

5

6

10

14

 

700

1

3

4

6

9

13

 

750

1

3

4

5

8

12

 

900

1

3

4

5

7

10

 

1000

1

2

3

4

7

9

THHN,

8

THWN,

6

34

77

100

128

196

279

THWN-2

4

21

47

62

79

121

172

 

2

15

34

44

57

87

124

 

1

11

25

33

42

65

93

 

1/0

9

22

28

36

56

79

 

2/0

8

18

23

30

46

65

 

3/0

6

15

20

25

38

55

 

4/0

5

12

16

20

32

45

 

250

4

10

13

16

25

35

 

300

4

8

11

14

22

31

 

350

3

7

9

12

19

27

 

400

3

6

8

11

17

24

 

500

2

5

7

9

14

20

 

600

1

4

6

7

11

16

 

700

1

4

5

6

10

14

 

750

1

4

5

6

9

14

 

900

1

3

4

5

7

10

 

1000

1

3

3

4

7

10

XHHW,

8

39

88

115

146

225

320

XHHW-2

6

29

65

85

109

167

238

 

4

21

47

62

79

121

172

 

2

15

34

44

57

87

124

 

1

11

25

33

42

65

93

 

1/0

9

22

28

36

56

79

 

2/0

8

18

24

30

47

67

 

3/0

6

15

20

25

38

55

 

4/0

5

12

16

21

32

46

 

250

4

10

13

17

26

37

 

300

4

8

11

14

22

31

 

350

3

7

10

12

19

28

 

400

3

7

9

11

17

25

 

500

2

5

7

9

14

20

 

600

1

4

6

7

11

16

 

700

1

4

5

6

10

14

 

750

1

3

5

6

9

13

 

900

1

3

4

5

7

10

 

1000

1

3

4

5

7

10

Definition: Compact stranding is the result of a manufacturing process where the standard conductor is compressed to the extent that the interstices (voids between strand wires) are virtually eliminated.






Pocket Guide to the National Electrical Code 2005
Pocket Guide to the National Electrical Code(R), 2005 Edition (8th Edition)
ISBN: 0131480014
EAN: 2147483647
Year: 2004
Pages: 120
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