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839TECHNICAL DATADATA SUBJECT TO CHANGE WITHOUT NOTICE.Wireway Size and Maximum Number of Conductors Allowed (areas shown are 20% of the full interior cross sectional area of the wireway)Conductor Size AWG-MCMArea of Conductor (sq. In.) 2.5\(1.14 sq.in.) 4.0\(3.02 sq.in.) 6.0\(6.94 sq.in.) 8.0\(12.45 sq.in.) 10.0\(19.56 sq.in.) 12.0\(28.27 sq.in.) RHH*, RHW*, RHW-2*, XF, XFF14 0.0209 54 144 332 595 935 135212 0.0260 43 116 266 478 752 108710 0.0333 34 90 208 373 587 8488 0.0556 20 54 124 223 351 508TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2*6 0.0726 15 41 95 171 269 3894 0.0973 11 31 71 127 201 2903 0.1134 10 26 61 109 172 2492 0.1333 8 22 52 93 146 2121 0.1901 5 15 36 65 102 1481/0 0.2223 5 13 31 56 87 1272/0 0.2624 4 11 26 47 74 1073/0 0.3117 3 9 22 39 62 904/0 0.3718 3 8 18 33 52 76250 0.4596 2 6 15 27 42 61300 0.5281 2 5 13 23 37 53350 0.5958 1 5 11 20 32 47400 0.6619 1 4 10 18 29 42500 0.7901 1 3 8 15 24 35600 0.9729 1 3 7 12 20 29700 1.1010 1 2 6 11 17 25750 1.1652 0 2 5 10 16 24800 1.2272 0 2 5 10 15 23900 1.3561 0 2 5 9 14 201000 1.4784 0 2 4 8 13 191250 1.8602 0 1 3 6 10 151500 2.1695 0 1 3 5 9 131750 2.4773 0 1 2 5 7 112000 2.7818 0 1 2 4 7 10TFN, TFFN18 0.0055 207 549 1261 2263 3556 514016 0.0072 158 419 963 1729 2716 3926THHN, THWN, THWN-214 0.0097 117 311 715 1283 2016 291412 0.0133 85 227 521 936 1470 212510 0.0211 54 143 328 590 927 13398 0.0366 31 82 189 340 534 7726 0.0507 22 59 136 245 355 5574 0.0824 13 36 84 151 237 3433 0.0973 11 31 71 127 201 2902 0.1158 9 26 59 107 168 2441 0.1562 7 19 44 79 127 1801/0 0.1855 6 16 37 67 105 152The 2008 National Electrical Code limits wireways as followsA wireway shall not contain more than 30 current-carrying conductors exept when the ampacity has been adjusted to Table 310-15(b) 2 (a)The sum of the cross sectional area of all conductors shall not exceed 20% of the interior cross sectional area of the wireway. Note section 14 of NTPA 79 allows 50% fill for industrial machine wireway. * Types RHH, RHW, and RHW-2 without outer coveringWIREWAYS FILL TABLES LAY-IN & FEED-THROUGH TYPE 1 & 4 (BASED ON THE NATIONAL ELECTRICAL CODE)
