NEC CONDU I T F I LL Maximum N umb er o f Co nducto rs In Co nduit o r T ubing: T ype of Wire Conductor Size Conduit Size (Inches) AWG MCM 1 /2 3 /4 1 1 1 /4 1 1 /2 2 2 1 /2 3 3 1 /2 4 5 6 TW , X HHW (14 t h ru 8) 14 9 15 25 44 60 99 142 — — — — — 12 7 12 19 35 47 78 111 171 — — — — 10 5 9 15 26 36 60 85 131 176 — — — 8 2 4 7 12 17 28 40 62 84 108 — — RHW and RHH 14 6 10 16 29 40 65 93 143 192 — — — (wit h o ut o ut er 12 4 8 13 24 32 53 76 117 157 — — — cov eri ng ) 10 4 6 11 19 26 43 61 95 127 163 — — THW 8 1 3 5 10 13 22 32 49 66 85 133 — TW , THW , FEPB 6 1 2 4 7 10 16 23 36 48 62 97 141 (6 t h ru 2) 4 1 1 3 5 7 12 17 27 36 47 73 106 RWH and RHH 3 1 1 2 4 6 10 15 23 31 40 63 91 (wit h o ut o ut er 2 1 1 2 4 5 9 13 20 27 34 54 78 cov eri ng ) 1 — 1 1 3 4 6 9 14 19 25 39 57 0 — 1 1 2 3 5 8 12 16 21 33 49 00 — 1 1 1 3 5 7 10 14 18 29 41 000 — 1 1 1 2 4 6 9 12 15 24 35 0000 — — 1 1 1 3 5 7 10 13 20 29 250 — — 1 1 1 2 4 6 8 10 16 23 300 — — 1 1 1 2 3 5 7 9 14 20 350 — — — 1 1 1 3 4 6 8 12 18 400 — — — 1 1 1 2 4 5 7 11 16 500 — — — 1 1 1 1 3 4 6 9 14 600 — — — — 1 1 1 3 4 5 7 11 700 — — — — 1 1 1 2 3 4 7 10 750 — — — — 1 1 1 2 3 4 6 9 THWN, THHN, FEP 14 13 24 39 69 94 154 — — — — — — (14 t h ru 2) 12 10 18 18 51 70 144 164 — — — — — FEPB 10 6 11 18 32 44 73 104 160 — — — — (14 t h ru 8) 8 3 5 9 16 22 36 51 79 106 136 — — X HHW 6 1 4 6 11 15 26 37 57 76 98 154 — (4 t h ru 500 MCM) 4 1 2 4 7 9 16 22 35 47 60 94 137 3 1 1 3 6 8 13 19 29 39 51 80 116 2 1 1 3 5 7 11 16 25 33 43 67 97 1 — 1 1 3 5 8 12 18 25 32 50 72 0 — 1 1 3 4 7 10 15 21 27 42 61 00 — 1 1 3 3 6 8 13 17 22 35 51 000 — 1 1 2 3 5 7 11 14 18 29 42 0000 — 1 1 1 2 4 6 9 12 15 24 35 250 — — 1 1 1 3 4 7 10 12 20 28 300 — — 1 1 1 3 4 6 8 11 17 24 350 — — 1 1 1 2 3 5 7 9 15 21 400 — — — 1 1 1 3 5 6 8 13 19 500 — — — 1 1 1 2 4 5 7 11 16 600 — — — 1 1 1 1 3 4 5 9 13 700 — — — — 1 1 1 3 4 5 8 11 750 — — — — 1 1 1 2 3 4 7 11 X HHW 6 1 3 5 9 13 21 30 47 63 81 128 183 600 — — — 1 1 1 1 3 4 5 9 13 700 — — — — 1 1 1 3 4 5 7 11 750 — — — — 1 1 1 2 3 4 7 10 Above information referenced from tables C1, C4, and C8 in the National Electric Code of 2008. For more information on the following types of conduit, please see the table listed below in the appendix C of the National Electric Code of 2008. Rigid PVC Conduit, Schedule 80 - Table C9 Rigid PVC Conduit, Schedule 40 - Table C10 Flexible Metallic Conduit - Table C3 Liquidtight Flexible Metallic Conduit - Table C7 Liquidtight Flexible Nonmetallic Conduit (Type FNMC-B)- Table C5 If you have any other questions see the NEC Code Book or ask an C.E.S. Employee.

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Page 1: NEC CONDU IT FILL M ximum Numb of Conductors In Conduit or ... Fill.pdf · NEC CONDUIT FILL Maximum Number of Conductors In Conduit or Tubing: Type of Wire Conductor Size Conduit

N E C C O N D U IT F I L LMaximum Number of Conductors In Conduit or Tubing:Type of Wire Conductor Size Conduit Size (Inches)

AWG MCM 1/2 3/4 1 11/4 11/2 2 21/2 3 31/2 4 5 6TW, XHHW

(14 thru 8) 14 9 15 25 44 60 99 142 — — — — —12 7 12 19 35 47 78 111 171 — — — —10 5 9 15 26 36 60 85 131 176 — — —

8 2 4 7 12 17 28 40 62 84 108 — —RHW and RHH 14 6 10 16 29 40 65 93 143 192 — — —(without outer 12 4 8 13 24 32 53 76 117 157 — — —

covering) 10 4 6 11 19 26 43 61 95 127 163 — —THW 8 1 3 5 10 13 22 32 49 66 85 133 —TW, THW, FEPB 6 1 2 4 7 10 16 23 36 48 62 97 141

(6 thru 2) 4 1 1 3 5 7 12 17 27 36 47 73 106RWH and RHH 3 1 1 2 4 6 10 15 23 31 40 63 91(without outer 2 1 1 2 4 5 9 13 20 27 34 54 78covering) 1 — 1 1 3 4 6 9 14 19 25 39 57

0 — 1 1 2 3 5 8 12 16 21 33 4900 — 1 1 1 3 5 7 10 14 18 29 41

000 — 1 1 1 2 4 6 9 12 15 24 350000 — — 1 1 1 3 5 7 10 13 20 29

250 — — 1 1 1 2 4 6 8 10 16 23300 — — 1 1 1 2 3 5 7 9 14 20350 — — — 1 1 1 3 4 6 8 12 18400 — — — 1 1 1 2 4 5 7 11 16500 — — — 1 1 1 1 3 4 6 9 14600 — — — — 1 1 1 3 4 5 7 11700 — — — — 1 1 1 2 3 4 7 10750 — — — — 1 1 1 2 3 4 6 9

THWN, THHN, FEP 14 13 24 39 69 94 154 — — — — — —(14 thru 2) 12 10 18 18 51 70 144 164 — — — — —

FEPB 10 6 11 18 32 44 73 104 160 — — — —(14 thru 8) 8 3 5 9 16 22 36 51 79 106 136 — —

XHHW 6 1 4 6 11 15 26 37 57 76 98 154 —(4 thru 500 MCM) 4 1 2 4 7 9 16 22 35 47 60 94 137

3 1 1 3 6 8 13 19 29 39 51 80 1162 1 1 3 5 7 11 16 25 33 43 67 971 — 1 1 3 5 8 12 18 25 32 50 72

0 — 1 1 3 4 7 10 15 21 27 42 6100 — 1 1 3 3 6 8 13 17 22 35 51

000 — 1 1 2 3 5 7 11 14 18 29 420000 — 1 1 1 2 4 6 9 12 15 24 35250 — — 1 1 1 3 4 7 10 12 20 28300 — — 1 1 1 3 4 6 8 11 17 24350 — — 1 1 1 2 3 5 7 9 15 21400 — — — 1 1 1 3 5 6 8 13 19500 — — — 1 1 1 2 4 5 7 11 16600 — — — 1 1 1 1 3 4 5 9 13700 — — — — 1 1 1 3 4 5 8 11750 — — — — 1 1 1 2 3 4 7 11

XHHW 6 1 3 5 9 13 21 30 47 63 81 128 183600 — — — 1 1 1 1 3 4 5 9 13700 — — — — 1 1 1 3 4 5 7 11750 — — — — 1 1 1 2 3 4 7 10

Above information referenced from tables C1, C4, and C8 in the National Electric Code of 2008. For more information on the following types of conduit, please see the table listed below in the appendix C of the National Electric Code of 2008.Rigid PVC Conduit, Schedule 80 - Table C9Rigid PVC Conduit, Schedule 40 - Table C10Flexible Metallic Conduit - Table C3Liquidtight Flexible Metallic Conduit - Table C7Liquidtight Flexible Nonmetallic Conduit (Type FNMC-B)- Table C5If you have any other questions see the NEC Code Book or ask an C.E.S. Employee.