Cut Sheet

20
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Specifications
Wiring Duct — Wire Fill Capacity
NOTE: Wire fill is based on 50% fill of duct area.
ELECTRICAL DATA CABLE
NOMINAL 8 AWG 10 AWG 12 AWG 14 AWG 16 AWG 18 AWG 22 AWG 24 AWG
DUCT SIZE AREA 0.216 0.153 0.122 0.158 0.105 0.139 0.165 0.096 0.125 0.084 0.113 0.065 0.217 0.250 0.422
(INCHES) (INCHES
2
) UTP/CM UTP/CM
W H THHN THHN THHN MTW THHN MTW MTW THHN MTW THHN MTW MTW CAT5E CAT6 UTP/CM
0.75 X 1.00 0.750 5 9 14 9 19 11 8 23 14 30 17 51 5 3 1
0.75 X 1.50 1.125 7 14 22 13 29 17 12 35 21 46 25 76 7 5 2
0.75 X 2.00 1.500 9 18 29 17 39 22 16 47 27 61 34 101 9 7 2
1.00 X 1.00 1.000 6 12 19 11 26 15 10 31 18 40 22 68 6 5 2
1.00 X 1.50 1.500 9 18 29 17 39 22 16 47 27 61 34 101 9 7 2
1.00 X 2.00 2.000 12 24 38 23 52 30 21 62 37 81 45 135 12 9 3
1.00 X 3.00 3.000 18 37 58 34 78 44 31 93 55 121 67 203 18 14 5
1.00 X 4.00 4.000 24 49 77 46 104 59 42 124 73 162 90 270 24 18 6
1.50 X 1.00 1.500 9 18 29 17 39 22 16 47 27 61 34 101 9 7 2
1.50 X 1.50 2.250 14 27 43 26 58 33 24 70 41 91 50 152 14 10 4
1.50 X 2.00 3.000 18 37 58 34 78 44 31 93 55 121 67 203 18 14 5
1.50 X 3.00 4.500 27 55 86 52 117 67 47 140 82 182 101 304 27 21 7
1.50 X 4.00 6.000 36 73 115 69 155 89 63 186 110 243 134 406 36 27 10
2.00 X 1.00 2.000 12 24 38 23 52 30 21 62 37 81 45 135 12 9 3
2.00 X 1.50 3.000 18 37 58 34 78 44 31 93 55 121 67 203 18 14 5
2.00 X 2.00 4.000 24 49 77 46 104 59 42 124 73 162 90 270 24 18 6
2.00 X 3.00 6.000 36 73 115 69 155 89 63 186 110 243 134 406 36 27 10
2.00 X 4.00 8.000 48 98 154 92 207 118 84 248 146 324 179 541 49 37 13
2.00 X 5.00 10.000 60 122 192 114 259 148 105 310 183 405 224 676 61 46 16
2.50 X 2.00 5.000 30 61 96 57 130 74 52 155 91 202 112 338 30 23 8
2.50 X 3.00 7.500 45 92 144 86 194 111 79 233 137 304 168 507 46 34 12
2.50 X 4.00 10.000 60 122 192 114 259 148 105 310 183 405 224 676 61 46 16
3.00 X 1.00 3.000 18 37 58 34 78 44 31 93 55 121 67 203 18 14 5
3.00 X 2.00 6.000 36 73 115 69 155 89 63 186 110 243 134 406 36 27 10
3.00 X 3.00 9.000 54 110 173 103 233 133 94 279 165 364 201 609 55 41 14
3.00 X 4.00 12.000 72 146 230 137 311 177 126 372 219 486 269 811 73 55 19
3.00 X 5.00 15.000 90 183 288 172 389 222 157 465 274 607 336 1014 91 69 24
4.00 X 1.50 6.000 36 73 115 69 155 89 63 186 110 243 134 406 36 27 10
4.00 X 2.00 8.000 48 98 154 92 207 118 84 248 146 324 179 541 49 37 13
4.00 X 3.00 12.000 72 146 230 137 311 177 126 372 219 486 269 811 73 55 19
4.00 X 4.00 16.000 96 195 307 183 415 237 168 496 293 648 358 1082 97 73 26
4.00 X 5.00 20.000 120 244 384 229 518 296 210 620 366 810 448 1352 121 91 32
6.00 X 4.00 24.000 144 293 461 275 622 355 252 744 439 972 537 1623 146 110 39
Number of wires =
Duct W x H
2
1.75 x (Wire O.D.)
2
Formula for Calculating Fill Capacity
and Accessories
and Accessories
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