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www.siechem.com 65 Wires & Cables Copper conductor cross section 2 mm Reduction Factor Number of simultaneous loaded conductors on each tray Installation Method 1.5 2.5 4 6 10 16 25 35 50 70 95 120 150 35 48 64 84 118 158 212 262 330 420 499 580 670 30 41 54 71 100 134 180 223 281 357 424 493 570 28 38 51 66 93 125 167 207 261 332 394 458 529 26 36 48 63 89 119 159 197 248 315 374 435 503 33 46 61 80 112 150 201 249 314 399 474 551 637 28 39 52 68 96 128 172 212 267 340 404 470 543 25 35 46 60 85 114 153 189 238 302 359 418 482 24 33 44 57 80 107 144 178 224 286 339 394 456 23 32 42 55 78 104 140 173 218 277 329 383 442 22 31 41 54 76 101 136 168 211 269 319 371 429 22 30 40 53 74 100 134 165 208 265 314 365 422 22 30 40 52 73 98 131 162 205 260 309 360 415 21 29 39 51 72 96 129 160 201 256 304 354 409 1 1 2 0.85 3 0.79 4 0.75 1 0.95 2 0.81 3 0.72 4 0.68 5 0.66 6 0.64 7 0.63 8 0.62 9 0.61 fixed on a ceiling or under floor Current Carrying capacity in A on floor or wall In conduit in a void or in a pipe 1 1 2 0.8 3 0.7 4 0.65 5 0.6 6 0.57 7 0.54 8 0.52 9 0.5 10 0.48 12 0.45 14 0.43 16 0.41 20 0.38 Current Carrying capacity in (A) Duct 29 39 52 66 92 120 160 196 248 309 426 457 23 31 42 53 74 96 128 157 198 247 341 366 20 27 36 46 64 84 112 137 174 216 298 320 19 25 34 43 60 78 104 127 161 201 277 297 17 23 31 40 55 72 96 118 149 185 256 274 Size 17 22 30 38 52 68 91 112 141 176 243 260 16 21 28 36 50 65 86 106 134 167 230 247 15 20 27 34 48 62 83 102 129 161 222 238 15 20 26 33 46 60 80 98 124 155 213 229 14 19 25 32 44 58 77 94 119 148 204 219 13 18 23 30 41 54 72 88 112 139 192 206 12 17 22 28 40 52 69 84 107 133 183 197 12 16 21 27 38 49 66 80 102 127 175 187 11 15 20 25 35 46 51 74 94 117 162 174 2 mm 1.5 2.5 4 6 10 16 25 35 50 70 95 120