Heads up: There are no amended sections in this chapter.

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

AMENDMENT
This section has been amended at the state or city level.

This informative annex is not a part of the requirements of this NFPA document but is included for informational purposes only.

Table C.1 — Number of The Same Size Conductors in Trade Size of Conduit or Tubing
Electrical Metallic Tubing (EMT)
Conductor Types THHN, THWN, THWN-2 (Based on Table 1, Chapter 9)


  100% 80% 70%
1 2 3 4 5 6 7 8 9
14 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
12 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
10 1/2 1/2 1/2 1/2 1/2 3/4 3/4 3/4 3/4
8 1/2 1/2 1/2 3/4 3/4 3/4 1 1 1
6 1/2 1/2 3/4 3/4 1 1 1 1-1/4 1-1/4
4 1/2 3/4 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2
3 1/2 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2 2
2 1/2 1 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2
1 1/2 1-1/4 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2
1/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
2/0 3/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2 2-1/2
3/0 3/4 1-1/2 1-1/2 2 2 2-1/2 2-1/2 2-1/2 3
4/0 3/4 1-1/2 2 2 2-1/2 2-1/2 2-1/2 3 3
250 1 2 2 2-1/2 2-1/2 2-1/2 3 3 3
300 1 2 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2
350 1 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2 3-1/2
400 1-1/4 2-1/2 2-1/2 2-1/2 3 3 3-1/2 3-1/2 4
500 1-1/4 2-1/2 2-1/2 3 3 3-1/2 4 4 - - -
600 1-1/4 2-1/2 3 3 3-1/2 4 4 - - - - - -
700 1-1/4 2-1/2 3 3-1/2 4 4 - - - - - - - - -
750 1-1/2 3 3 3-1/2 4 - - - - - - - - - - - -
800 1-1/2 3 3 3-1/2 4 - - - - - - - - - - - -
900 1-1/2 3 3 4 - - - - - - - - - - - - - - -
1,000 1-1/2 3 3-1/2 4 - - - - - - - - - - - - - - -


Table C.1(A) — Number of The Same Size Compact Stranded Conductors in Trade Size of Conduit or Tubing
Electrical Metallic Tubing (EMT)
Conductor Types THHN (Based on Table 1, Chapter 9)

  100% 80% 70%
1 2 3 4 5 6 7 8 9
6 1/2 1/2 3/4 3/4 1 1 1 1-1/4 1-1/4
4 1/2 3/4 3/4 1 1-1/4 1-1/4 1-1/4 1-1/4 1-1/2
2 1/2 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2 2
1 1/2 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2 2
1/0 1/2 1-1/4 1-1/4 1-1/2 1-1/2 2 2 2 2-1/2
2/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
3/0 3/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2 2-1/2
4/0 3/4 1-1/4 1-1/2 2 2 2-1/2 2-1/2 2-1/2 3
250 3/4 2 2 2 2-1/2 2-1/2 3 3 3
300 1 2 2 2-1/2 2-1/2 3 3 3 3-1/2
350 1 2 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2
400 1 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2 3-1/2
500 1-1/4 2-1/2 2-1/2 2-1/2 3 3-1/2 3-1/2 4 4
600 1-1/4 2-1/2 2-1/2 3 3-1/2 3-1/2 4 - - - - - -
700 1-1/4 2-1/2 3 3 3-1/2 4 4 - - - - - -
750 1-1/4 2-1/2 3 3 3-1/2 4 - - - - - - - - -
1,000 1-1/2 3 3 4 - - - - - - - - - - - - - - -


Table C.3 — Number of The Same Size Conductors in Trade Size of Conduit or Tubing
Flexible Metal Conduit (FMC)
Conductor Types THHN, THWN, THWN-2 (Based on Table 1, Chapter 9)


  100% 80% 70%
1 2 3 4 5 6 7 8 9
14 1/2 1/2 1/2 1/2 1/2
12 1/2 1/2 1/2 1/2 1/2 1/2
10 1/2 1/2 1/2 1/2 1/2 3/4 3/4 3/4
8 1/2 1/2 3/4 3/4 3/4 1 1 1
6 1/2 3/4 3/4 1 1 1-1/4 1-1/4 1-1/4
4 1/2 3/4 1 1 1-1/4 1-1/4 2 2 2
3 1/2 1 1 1-1/4 1-1/4 2 2 2 2
2 1/2 1 1 1-1/4 2 2 2 2 2
1 1/2 1-1/4 1-1/4 2 2 2 2 2 2-1/2
1/0 1/2 1-1/4 2 2 2 2 2 2-1/2 2-1/2
2/0 3/4 1-1/2 2 2 2 2 2-1/2 2-1/2 2-1/2
3/0 3/4 1-1/2 2 2 2 2-1/2 2-1/2 3 3
4/0 3/4 2 2 2 2-1/2 2-1/2 3 3 3-1/2
250 1 2 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2
300 1 2 2 2-1/2 3 3 3-1/2 3-1/2 4
350 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
400 1-1/4 2-1/2 2-1/2 3 3 3-1/2 4 4 - - -
500 1-1/4 2-1/2 3 3 3-1/2 4 4 - - - - - -
600 1-1/2 3 3 3-1/2 4 - - - - - - - - - - - -
700 1-1/2 3 3 3-1/2 4 - - - - - - - - - - - -
750 1-1/2 3 3-1/2 4 - - - - - - - - - - - - - - -
800 1-1/2 3 3-1/2 4 - - - - - - - - - - - - - - -
900 2 3-1/2 3-1/2 4 - - - - - - - - - - - - - - -
1,000 2 3-1/2 3-1/2 - - - - - - - - - - - - - - - - - -


Table C.3(A) — Number of The Same Size Compact Stranded Conductors in Trade Size of Conduit or Tubing
Flexible Metal Conduit (FMC)
Conductor Types THHN (Based on Table 1, Chapter 9)

  100% 80% 70%
1 2 3 4 5 6 7 8 9
6 1/2 1/2 3/4 1 1 1 1-1/4 1-1/4
4 3/4 3/4 1 1-1/4 1-1/4 1-1/4 2 2
2 1/2 1 1 1-1/4 1-1/4 2 2 2 2
1 1/2 1 1-1/4 2 2 2 2 2 2
1/0 1/2 1-1/4 1-1/4 2 2 2 2 2 2-1/2
2/0 1/2 1-1/4 2 2 2 2 2-1/2 2-1/2 2-1/2
3/0 3/4 1-1/2 2 2 2 2-1/2 2-1/2 2-1/2 3
4/0 3/4 1-1/2 2 2 2-1/2 2-1/2 2-1/2 3 3
250 1 2 2 2-1/2 2-1/2 3 3 3 3-1/2
300 1 2 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2
350 1 2 2 2-1/2 3 3 3-1/2 3-1/2 4
400 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
500 1-1/4 2-1/2 2-1/2 3 3-1/2 3-1/2 4 4 - - -
600 1-1/4 2-1/2 3 3-1/2 3-1/2 4 - - - - - - - - -
700 1-1/2 3 3 3-1/2 4 4 - - - - - - - - -
750 1-1/2 3 3 3-1/2 4 - - - - - - - - - - - -
1,000 2 3-1/2 3-1/2 4 - - - - - - - - - - - - - - -


Table C.4 — Number of The Same Size Conductors in Trade Size of Conduit or Tubing
Intermediate Metal Conduit (IMC)
Conductor Types THHN, THWN, THWN-2 (Based on Table 1, Chapter 9)


  100% 80% 70%
1 2 3 4 5 6 7 8 9
14 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
12 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
10 1/2 1/2 1/2 1/2 1/2 1/2 3/4 3/4 3/4
8 1/2 1/2 1/2 3/4 3/4 3/4 1 1 1
6 1/2 1/2 3/4 3/4 1 1 1 1-1/4 1-1/4
4 1/2 3/4 3/4 1 1-1/4 1-1/4 1-1/4 1-1/4 1-1/2
3 1/2 3/4 1 1 1-1/4 1-1/4 1-1/2 1-1/2 1-1/2
2 1/2 1 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2
1 1/2 1 1-1/4 1-1/4 1-1/2 2 2 2 2
1/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2 2 2-1/2
2/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2-1/2 2-1/2 2-1/2
3/0 3/4 1-1/4 1-1/2 2 2 2-1/2 2-1/2 3 3
4/0 3/4 1-1/2 2 2 2-1/2 2-1/2 3 3 3
250 1 2 2 2-1/2 2-1/2 3 3 3 3-1/2
300 1 2 2 2-1/2 3 3 3 3-1/2 3-1/2
350 1 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2 4
400 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
500 1-1/4 2-1/2 2-1/2 3 3-1/2 3-1/2 4 - - - - - -
600 1-1/4 2-1/2 3 3-1/2 3-1/2 4 - - - - - - - - -
700 1-1/4 3 3 3-1/2 4 - - - - - - - - - - - -
750 1-1/4 3 3 3-1/2 4 - - - - - - - - - - - -
800 1-1/2 3 3 3-1/2 4 - - - - - - - - - - - -
900 1-1/2 3 3-1/2 4 - - - - - - - - - - - - - - -
1,000 1-1/2 3 3-1/2 4 - - - - - - - - - - - - - - -


Table C.4(A) — Number of The Same Size Compact Stranded Conductors in Trade Size of Conduit or Tubing
Intermediate Metal Conduit (IMC)
Conductor Types THHN (Based on Table 1, Chapter 9)


  100% 80% 70%
1 2 3 4 5 6 7 8 9
6 1/2 1/2 1/2 3/4 3/4 1 1 1 1-1/4
4 1/2 3/4 3/4 1 1 1-1/4 1-1/4 1-1/4 1-1/4
2 1/2 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2 2
1 1/2 1 1 1-1/4 1-1/4 1-1/2 2 2 2
1/0 1/2 1 1-1/4 1-1/4 1-1/2 2 2 2 2
2/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
3/0 3/4 1-1/4 1-1/4 1-1/2 2 2 2-1/2 2-1/2 2-1/2
4/0 3/4 1-1/4 1-1/2 2 2 2-1/2 2-1/2 3 3
250 3/4 1-1/2 2 2 2-1/2 2-1/2 3 3 3
300 1 2 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2
350 1 2 2 2-1/2 3 3 3 3-1/2 3-1/2
400 1 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2 4
500 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
600 1-1/4 2-1/2 3 3 3-1/2 4 4 - - - - - -
700 1-1/4 2-1/2 3 3-1/2 3-1/2 4 - - - - - - - - -
750 1-1/4 3 3 3-1/2 4 4 - - - - - - - - -
1,000 1-1/2 3 3-1/2 4 - - - - - - - - - - - - - - -


Table C.8 — Number of The Same Size Conductors in Trade Size of Conduit or Tubing
Liquidtight Flexible Metal Conduit (LFMC)
Conductor Types THHN, THWN, THWN-2 (Based on Table 1, Chapter 9)

  100% 80% 70%
1 2 3 4 5 6 7 8 9
14 1/2
12 1/2 1/2 1/2 1/2
10 1/2 1/2 1/2 3/4 3/4 3/4
8 1/2 1/2 3/4 3/4 3/4 1 1 1
6 1/2 3/4 3/4 1 1 1 1-1/4 1-1/4
4 3/4 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2
3 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2 2
2 1 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2
1 1/2 1-1/4 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2
1/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
2/0 3/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2 3
3/0 3/4 1-1/2 1-1/2 2 2 2-1/2 2-1/2 3 3
4/0 3/4 1-1/2 2 2 2-1/2 2-1/2 3 3 3
250 1 2 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2
300 1 2 2 2-1/2 3 3 3-1/2 3-1/2 4
350 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
400 1-1/4 2-1/2 2-1/2 3 3 3-1/2 4 4 - - -
500 1-1/4 2-1/2 3 3 3-1/2 4 4 - - - - - -
600 1-1/4 3 3 3-1/2 4 4 - - - - - - - - -
700 1-1/4 3 3 3-1/2 4 - - - - - - - - - - - -
750 1-1/2 3 3 4 4 - - - - - - - - - - - -
800 1-1/2 3 3-1/2 4 - - - - - - - - - - - - - - -
900 1-1/2 3 3-1/2 4 - - - - - - - - - - - - - - -
1,000 2 3-1/2 3-1/2 - - - - - - - - - - - - - - - - - -


Table C.8(A) — Number of The Same Size Compact Stranded Conductors in Trade Size of Conduit or Tubing
Liquidtight Flexible Metal Conduit (LFMC)
Conductor Types THHN (Based on Table 1, Chapter 9)


  100% 80% 70%
1 2 3 4 5 6 7 8 9
6 1/2 3/4 3/4 1 1 1 1-1/4 1-1/4
4 3/4 3/4 1 1-1/4 1-1/4 1-1/4 1-1/4 1-1/2
2 1 1 1-1/4 1-1/4 1-1/4 1-1/2 2 2
1 1/2 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2 2
1/0 1/2 1-1/4 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2
2/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2-1/2 2-1/2 2-1/2
3/0 3/4 1-1/4 1-1/2 2 2 2-1/2 2-1/2 2-1/2 3
4/0 3/4 1-1/2 1-1/2 2 2-1/2 2-1/2 2-1/2 3 3
250 3/4 2 2 2-1/2 2-1/2 3 3 3 3-1/2
300 1 2 2 2-1/2 3 3 3 3-1/2 3-1/2
350 1 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2 4
400 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
500 1-1/4 2-1/2 2-1/2 3 3 3-1/2 4 4 - - -
600 1-1/4 2-1/2 3 3 3-1/2 4 - - - - - - - - -
700 1-1/4 3 3 3-1/2 4 4 - - - - - - - - -
750 1-1/4 3 3 3-1/2 4 - - - - - - - - - - - -
1,000 1-1/2 3 3-1/2 4 - - - - - - - - - - - - - - -


Table C.9 — Number of The Same Size Conductors in Trade Size of Conduit or Tubing
Rigid Metal Conduit (RMC)
Conductor Types THHN, THWN, THWN-2 (Based on Table 1, Chapter 9)

  100% 80% 70%
1 2 3 4 5 6 7 8 9
14 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
12 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
10 1/2 1/2 1/2 1/2 1/2 1/2 3/4 3/4 3/4
8 1/2 1/2 1/2 3/4 3/4 3/4 1 1 1
6 1/2 1/2 3/4 3/4 1 1 1 1-1/4 1-1/4
4 1/2 3/4 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2
3 1/2 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2 2
2 1/2 1 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2
1 1/2 1-1/4 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2
1/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
2/0 3/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2 3
3/0 3/4 1-1/2 1-1/2 2 2 2-1/2 2-1/2 3 3
4/0 3/4 1-1/2 2 2 2-1/2 2-1/2 3 3 3
250 1 2 2 2-1/2 2-1/2 3 3 3-1/2 3-1/2
300 1 2 2 2-1/2 3 3 3-1/2 3-1/2 4
350 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
400 1 2 2-1/2 3 3 3-1/2 3-1/2 4 5
500 1-1/4 2-1/2 3 3 3-1/2 4 4 5 5
600 1-1/4 3 3 3-1/2 4 4 5 5 5
700 1-1/4 3 3 3-1/2 4 5 5 5 6
750 1-1/2 3 3 3-1/2 4 5 5 6 6
800 1-1/2 3 3-1/2 4 5 5 5 6 6
900 1-1/2 3 3-1/2 4 5 5 6 6 6
1,000 1-1/2 3-1/2 3-1/2 4 5 5 6 6 - - -


Table C.9(A) — Number of The Same Size Compact Stranded Conductors in Trade Size of Conduit or Tubing
Rigid Metal Conduit (RMC)
Conductor Types THHN (Based on Table 1, Chapter 9)

  100% 80% 70%
1 2 3 4 5 6 7 8 9
6 1/2 1/2 3/4 3/4 3/4 1 1 1 1-1/4
4 1/2 3/4 3/4 1 1 1-1/4 1-1/4 1-1/4 1-1/2
2 1/2 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2 2
1 1/2 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2 2
1/0 1/2 1-1/4 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2
2/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
3/0 3/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2 3
4/0 3/4 1-1/2 1-1/2 2 2 2-1/2 2-1/2 3 3
250 3/4 1-1/2 2 2 2-1/2 3 3 3 3-1/2
300 1 2 2 2-1/2 3 3 3 3-1/2 3-1/2
350 1 2 2 2-1/2 3 3 3-1/2 3-1/2 4
400 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
500 1-1/4 2-1/2 2-1/2 3 3 3-1/2 4 4 5
600 1-1/4 2-1/2 3 3 3-1/2 4 5 5 5
700 1-1/4 3 3 3-1/2 4 4 5 5 5
750 1-1/4 3 3 3-1/2 4 5 5 5 5
1,000 1-1/2 3 3-1/2 4 5 5 6 6 6

Table C.10 — Number of The Same Size Conductors in Trade Size of Conduit or Tubing
Rigid PVC Conduit, Schedule 80
Conductor Types THHN, THWN, THWN-2 (Based on Table 1, Chapter 9)
  100% 80% 70%
1 2 3 4 5 6 7 8 9
14 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
12 1/2 1/2 1/2 1/2 1/2 1/2 3/4 3/4 3/4
10 1/2 1/2 1/2 1/2 3/4 3/4 3/4 1 1
8 1/2 1/2 3/4 3/4 1 1 1 1-1/4 1-1/4
6 1/2 3/4 3/4 1 1 1-1/4 1-1/4 1-1/4 1-1/4
4 1/2 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2 2
3 1/2 1 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2
2 1/2 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2 2
1 3/4 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
1/0 3/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2 2-1/2
2/0 3/4 1-1/2 1-1/2 2 2 2-1/2 2-1/2 3 3
3/0 3/4 1-1/2 2 2 2-1/2 2-1/2 3 3 3
4/0 1 2 2 2-1/2 2-1/2 3 3 3 3-1/2
250 1 2 2 2-1/2 3 3 3-1/2 3-1/2 4
300 1-1/4 2 2-1/2 3 3 3-1/2 3-1/2 4 4
350 1-1/4 2-1/2 2-1/2 3 3 3-1/2 4 4 5
400 1-1/4 2-1/2 2-1/2 3 3-1/2 3-1/2 4 5 5
500 1-1/4 2-1/2 3 3-1/2 3-1/2 4 5 5 5
600 1-1/2 3 3 3-1/2 4 5 5 5 6
700 1-1/2 3 3-1/2 4 5 5 5 6 6
750 1-1/2 3 3-1/2 4 5 5 5 6 6
800 1-1/2 3 3-1/2 4 5 5 6 6 6
900 2 3-1/2 3-1/2 5 5 5 6 6 - - -
1,000 2 3-1/2 4 5 5 6 6 - - - - - -


Table C.10(A) — Number of The Same Size Compact Stranded Conductors in Trade Size of Conduit or Tubing
Rigid PVC Conduit, Schedule 80
Conductor Types THHN (Based on Table 1, Chapter 9)

  100% 80% 70%
1 2 3 4 5 6 7 8 9
6 1/2 3/4 3/4 1 1 1 1-1/4 1-1/4 1-1/4
4 1/2 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2 1-1/2
2 1/2 1 1-1/4 1-1/4 1-1/4 1-1/2 2 2 2
1 1/2 1-1/4 1-1/4 1-1/2 1-1/2 2 2 2 2-1/2
1/0 3/4 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
2/0 3/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2 3
3/0 3/4 1-1/2 1-1/2 2 2 2-1/2 2-1/2 3 3
4/0 1 1-1/2 2 2 2-1/2 2-1/2 3 3 3
250 1 2 2 2-1/2 3 3 3 3-1/2 3-1/2
300 1 2 2 2-1/2 3 3 3-1/2 3-1/2 4
350 1-1/4 2 2-1/2 3 3 3-1/2 3-1/2 4 4
400 1-1/4 2-1/2 2-1/2 3 3 3-1/2 4 4 5
500 1-1/4 2-1/2 3 3 3-1/2 4 4 5 5
600 1-1/4 3 3 3-1/2 4 4 5 5 5
700 1-1/2 3 3 3-1/2 4 5 5 5 6
750 1-1/2 3 3 3-1/2 4 5 5 5 6
1,000 2 3-1/2 3-1/2 5 5 6 6 6 - - -

Table C.11 — Number of The Same Size Conductors in Trade Size of Conduit or Tubing
Rigid PVC Conduit, Schedule 40
Conductor Types THHN, THWN, THWN-2 (Based on Table 1, Chapter 9)

  100% 80% 70%
1 2 3 4 5 6 7 8 9
14 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
12 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 3/4
10 1/2 1/2 1/2 1/2 1/2 3/4 3/4 3/4 3/4
8 1/2 1/2 1/2 3/4 3/4 1 1 1 1
6 1/2 3/4 3/4 3/4 1 1 1-1/4 1-1/4 1-1/4
4 1/2 3/4 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2
3 1/2 1 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2 2
2 1/2 1 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2
1 1/2 1-1/4 1-1/4 1-1/2 1-1/2 2 2 2 2-1/2
1/0 1/2 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
2/0 3/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2 3
3/0 3/4 1-1/2 1-1/2 2 2 2-1/2 2-1/2 3 3
4/0 3/4 1-1/2 2 2 2-1/2 2-1/2 3 3 3
250 1 2 2 2-1/2 3 3 3 3-1/2 3-1/2
300 1 2 2 2-1/2 3 3 3-1/2 3-1/2 4
350 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
400 1-1/4 2-1/2 2-1/2 3 3 3-1/2 4 4 5
500 1-1/4 2-1/2 3 3 3-1/2 4 4 5 5
600 1-1/4 3 3 3-1/2 4 5 5 5 5
700 1-1/2 3 3 3-1/2 4 5 5 5 6
750 1-1/2 3 3-1/2 4 5 5 5 6 6
800 1-1/2 3 3-1/2 4 5 5 5 6 6
900 1-1/2 3 3-1/2 4 5 5 6 6 6
1,000 2 3-1/2 3-1/2 5 5 5 6 6 - - -


Table C.11(A) — Number of The Same Size Compact Stranded Conductors in Trade Size of Conduit or Tubing
Rigid PVC Conduit, Schedule 40
Conductor Types THHN (Based on Table 1, Chapter 9)

  100% 80% 70%
1 2 3 4 5 6 7 8 9
6 1/2 1/2 3/4 3/4 1 1 1 1-1/4 1-1/4
4 1/2 3/4 1 1 1-1/4 1-1/4 1-1/4 1-1/4 1-1/2
2 1/2 1 1 1-1/4 1-1/4 1-1/2 1-1/2 1-1/2 2
1 1/2 1 1-1/4 1-1/4 1-1/2 1-1/2 2 2 2
1/0 1/2 1-1/4 1-1/4 1-1/2 1-1/2 2 2 2 2-1/2
2/0 3/4 1-1/4 1-1/4 1-1/2 2 2 2 2-1/2 2-1/2
3/0 3/4 1-1/4 1-1/2 2 2 2-1/2 2-1/2 2-1/2 3
4/0 3/4 1-1/2 1-1/2 2 2-1/2 2-1/2 3 3 3
250 1 2 2 2-1/2 2-1/2 3 3 3 3-1/2
300 1 2 2 2-1/2 3 3 3 3-1/2 3-1/2
350 1 2 2 2-1/2 3 3 3-1/2 3-1/2 4
400 1 2 2-1/2 3 3 3-1/2 3-1/2 4 4
500 1-1/4 2-1/2 2-1/2 3 3-1/2 3-1/2 4 4 5
600 1-1/4 2-1/2 3 3 3-1/2 4 5 5 5
700 1-1/4 3 3 3-1/2 4 5 5 5 5
750 1-1/4 3 3 3-1/2 4 5 5 5 6
1,000 1-1/2 3 3-1/2 4 5 5 6 6 6
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