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Conductor Fill

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Conductor Fill

 

Maximum Number of Conductors in Electrical Metalic Tubing

Type

Conductor

Trade Size (in.)

THHN, THWN, THWN-2

Size (AWG / kcmil)

½

¾

1

2

3

4

14 12 10 8 12 9 5 3 22 16 10 6 35 26 16 9 61 45 28 16 84 61 38 22 138 101 63 36 241 176 111 64 364 266 167 96 476 347 219 126 608 443 279 161

6 4 3 2 1

2 1 1 1 1

4 2 1 1 1

7 4 3 3 1

12 7 6 5 4

16 10 8 7 5

26 16 13 11 8

46 28 24 20 15

69 43 36 30 22

91 56 47 40 29

116 71 60 51 37

1/0 2/0 3/0 4/0 250

1 0 0 0 0

1 1 1 1 0

1 1 1 1 1

3 2 1 1 1

4 3 3 2 1

7 6 5 4 3

12 10 8 7 6

19 16 13 11 9

25 20 17 14 11

32 26 22 18 15

300 350 400 500 600

0 0 0 0 0

0 0 0 0 0

1 1 0 0 0

1 1 1 1 1

1 1 1 1 1

3 2 1 1 1

5 4 4 3 2

7 6 6 5 4

10 9 8 6 5

13 11 10 8 7

700 750 800 900 1000

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

1 0 0 0 0

1 1 1 1 1

1 1 1 1 1

2 1 1 1 1

3 3 3 3 2

4 4 4 3 3

6 5 5 4 4

 

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