Tables > Conduit and Tubing > Conductors > Max conductors in rigid metallic conduit

	Type Letters Cond. Size AWG/kcmil Trade Sizes In Inches .50 .75 1 1.25 1.50 2 2.50 3 3.50 4 5 6 RH 14 6 10 17 29 39 65 93 143 191 246 387 558   12 5 8 13 23 32 52 75 115 154 198 311 448 RHH, RHW, RHW-2 14 4 7 12 21 28 46 66 102 136 176 276 398   12 3 6 10 17 23 38 55 85 113 146 229 330 RH, RHH, RHW, RHW-2 10 3 5 8 14 19 31 44 68 91 118 185 267   8 1 2 4 7 10 16 23 36 48 61 97 139   6 1 1 3 6 8 13 18 29 38 49 77 112   4 1 1 2 4 6 10 14 22 30 38 60 87   3 1 1 2 4 5 9 12 19 26 34 53 76   2 1 1 1 3 4 7 11 17 23 29 36 66   1 0 1 1 1 3 5 7 11 15 19 30 44   1/0 0 1 1 1 2 4 6 10 13 17 26 38   2/0 0 1 1 1 2 4 5 8 11 14 23 33   3/0 0 0 1 1 1 3 4 7 10 12 20 28   4/0 0 0 1 1 1 3 4 6 8 11 17 24   250 0 0 0 1 1 1 3 4 6 8 13 18   300 0 0 0 1 1 1 2 4 5 7 11 16   350 0 0 0 1 1 1 2 4 5 6 10 15   400 0 0 0 1 1 1 1 3 4 6 9 13   500 0 0 0 1 1 1 1 3 4 5 8 11   600 0 0 0 0 1 1 1 2 3 4 6 9   700 0 0 0 0 1 1 1 1 3 4 6 8   750 0 0 0 0 0 1 1 1 3 3 5 8 TW 14 9 15 25 44 59 98 140 216 288 370 581 839   12 7 12 19 33 45 75 107 165 221 284 446 644   10 5 9 14 25 34 56 80 123 164 212 332 480   8 3 5 8 14 19 31 44 68 91 118 185 267 RHH*, RHW*, RHW-2*, THHW, THW, THW-2 14 6 10 17 29 39 65 93 143 191 246 387 558 RHH*, RHW*, RHW-2*, THHW, THW 12 5 8 13 23 32 52 75 115 154 198 311 448   10 3 6 10 18 25 41 58 90 120 154 242 350 RHH*, RHW*, RHW-2*, THHW, THW, THW-2 8 1 4 6 11 15 24 35 54 72 92 145 209 RHH*, RHW*, RHW-2*, TW, THW, THHW, THW-2 6 1 3 5 8 11 18 27 41 55 71 111 160   4 1 1 3 6 8 14 20 31 41 53 83 120   3 1 1 3 5 7 12 17 26 35 45 71 103   2 1 1 2 4 6 10 14 22 30 38 60 87   1 1 1 1 3 4 7 10 15 21 27 42 61   1/0 0 1 1 2 3 6 8 13 18 23 36 52   2/0 0 1 1 2 3 5 7 11 15 19 31 44   3/0 0 1 1 1 2 4 6 9 13 16 26 37   4/0 0 0 1 1 1 3 5 8 10 14 21 31   250 0 0 1 1 1 3 4 6 8 11 17 25   300 0 0 1 1 1 2 3 5 7 9 15 22   350 0 0 0 1 1 1 3 5 6 8 13 19   400 0 0 0 1 1 1 3 4 6 7 12 17   500 0 0 0 1 1 1 2 3 5 6 10 14   600 0 0 0 1 1 1 1 3 4 5 8 12   700 0 0 0 0 1 1 1 2 3 4 7 10   750 0 0 0 0 1 1 1 2 3 4 7 10 THHN, THWN, THWN-2 14 13 22 36 63 85 140 200 309 412 531 833 1202   12 9 16 26 46 62 102 146 225 301 387 608 877   10 6 10 17 29 39 64 92 142 189 244 383 552   8 3 6 9 16 22 37 53 82 109 140 221 318   6 2 4 7 12 16 27 38 59 79 101 159 230   4 1 2 4 7 10 16 23 36 48 62 98 141   3 1 1 3 6 8 14 20 31 41 53 83 120   2 1 1 3 5 7 11 17 26 34 44 70 100   1 1 1 1 4 5 8 12 19 25 33 51 74   1/0 1 1 1 3 4 7 10 16 21 27 43 63   2/0 0 1 1 2 3 6 8 13 18 23 36 52   3/0 0 1 1 1 3 5 7 11 15 19 30 43   4/0 0 1 1 1 2 4 6 9 12 16 25 36   250 0 0 1 1 1 3 5 7 10 13 20 29   300 0 0 1 1 1 3 4 6 8 11 17 25   350 0 0 1 1 1 2 3 5 7 10 15 22   400 0 0 1 1 1 2 3 5 7 8 13 20   500 0 0 0 1 1 1 2 4 5 7 11 16   600 0 0 0 1 1 1 1 3 4 6 9 13   700 0 0 0 1 1 1 1 3 4 5 8 11   750 0 0 0 0 1 1 1 3 4 5 7 11 FEP, FEPB, PFA, PFAH, TFE 14 12 22 35 61 83 136 194 300 400 515 808 1166   12 9 16 26 44 60 99 142 219 292 376 590 851   10 6 11 18 32 43 71 102 157 209 269 423 610   8 3 6 10 18 25 41 58 90 120 154 242 350   6 2 4 7 13 17 29 41 64 85 110 172 249   4 1 3 5 9 12 20 29 44 59 77 120 174   3 1 2 4 7 10 17 24 37 50 64 100 145   2 1 1 3 6 8 14 20 31 41 53 83 120 PFA, PFAH, TFE 1 1 1 2 4 6 9 14 21 28 37 57 83 PFA, PFAH, TFE, Z 1/0 1 1 1 3 5 8 11 18 24 30 48 69   2/0 1 1 1 3 4 6 9 14 19 25 40 57   3/0 0 1 1 2 3 5 8 12 16 21 33 47   4/0 0 1 1 1 2 4 6 10 13 17 27 39 Z 14 15 26 42 73 100 164 234 361 482 621 974 1405   12 10 18 30 52 71 116 166 256 342 440 691 997   10 6 11 18 32 43 71 102 157 209 269 423 610   8 4 7 11 20 27 45 64 99 132 170 267 386   6 3 5 8 14 19 31 45 69 93 120 188 271   4 1 3 5 9 13 22 31 48 64 82 129 186   3 1 2 4 7 9 16 22 35 47 60 94 136   2 1 1 3 6 8 13 19 29 39 50 78 113   1 1 1 2 5 6 10 15 23 31 40 63 92 XHH, XHHW, XHHW-2, ZW 14 9 15 25 44 59 98 140 216 288 370 581 839   12 7 12 19 33 45 75 107 165 221 284 446 644   10 5 9 14 25 34 56 80 123 164 212 332 480   8 3 5 8 14 19 31 44 68 91 118 185 267   6 1 3 6 10 14 23 33 51 68 87 137 197   4 1 2 4 7 10 16 24 37 49 63 99 143   3 1 1 3 6 8 14 20 31 41 53 84 121   2 1 1 3 5 7 12 17 26 35 45 70 101 XHH, XHHW, XHHW-2 1 1 1 1 4 5 9 12 19 26 33 52 76   1/0 1 1 1 3 4 7 10 16 22 28 44 64   2/0 0 1 1 2 3 6 9 13 18 23 37 53   3/0 0 1 1 1 3 5 7 11 15 19 30 44   4/0 0 1 1 1 2 4 6 9 12 16 25 36   250 0 0 1 1 1 3 5 7 10 13 20 30   300 0 0 1 1 1 3 4 6 9 11 18 25   350 0 0 1 1 1 2 3 6 7 10 15 22   400 0 0 1 1 1 2 3 5 7 9 14 20   500 0 0 0 1 1 1 2 4 5 7 11 16   600 0 0 0 1 1 1 1 3 4 6 9 13   700 0 0 0 1 1 1 1 3 4 5 8 11   750 0 0 0 0 1 1 1 3 4 5 7 11
Reprinted with permission from NFPA 70-1999, the National Electrical Code®, Copyright 1998, 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.
See also Guides Conductor sizing and ampacities for insulated conductors rated 0-2000 Volts in raceway, cable, or direct buried Parallel Conductor sizing and ampacities for insulated conductors rated 0-2000 Volts in raceway, cable, or direct buried Tables Maximum number of conductors in rigid PVC conduit, schedule 40 Maximum number of conductors in rigid PVC conduit, schedule 80 Definitions Offset Bend Back-to-back Bend