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THHN THWN building wire is a general used electric wire used for branch circuits distribution, circuit feeders system, cable conduits, raceways and electric power transmission services, 1/0 and larger for cable tray use, with a voltage of 600V or less. It is made up of:
Conductor: 14 AWG to 1000 kcmil bare annealed compressed stranded copper per ASTM B3 and ASTM B8, 14 AWG to 10 AWG solid plain copper per ASTM B3.
Insulation: Premium-grade color-coded flame-retardant, heat- and moisture-resistant Polyvinyl Chloride (PVC).
Jacket: Tough Polyamide jacket (Nylon).
CONDUCTOR SIZE | NUMBER OF WIRES | MIN. AVG. INSULATION THICKNESS | JACKET THICKNESS | NOMINAL CABLE DIAMETER | COPPER WEIGHT | NET WEIGHT | AMPACITY ?30°C AMBIENT | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
AWG/kcmil | mm2 | INCHES | mm | INCHES | mm | INCHES | mm | LBS/1000 FT | kg/km | LBS/1000 FT | kg/km | @75°C | @90°C | |
14 | 2.08 | 1 | 0.015 | 0.38 | 0.004 | 0.1 | 0.102 | 2.59 | 16 | 24 | 19 | 28 | 20 | 25 |
14 | 2.08 | 19 | 0.015 | 0.38 | 0.004 | 0.1 | 0.109 | 2.77 | 13 | 19 | 16 | 24 | 20 | 25 |
12 | 3.31 | 1 | 0.015 | 0.38 | 0.004 | 0.1 | 0.119 | 3.02 | 25 | 37 | 28 | 42 | 25 | 30 |
12 | 3.31 | 19 | 0.015 | 0.38 | 0.004 | 0.1 | 0.13 | 3.3 | 20 | 30 | 24 | 36 | 25 | 30 |
10 | 5.26 | 1 | 0.02 | 0.51 | 0.004 | 0.1 | 0.15 | 3.81 | 40 | 60 | 45 | 67 | 35 | 40 |
10 | 5.26 | 19 | 0.02 | 0.51 | 0.004 | 0.1 | 0.161 | 4.09 | 32 | 48 | 38 | 57 | 35 | 40 |
8 | 8.37 | 19 | 0.03 | 0.76 | 0.005 | 0.13 | 0.212 | 5.38 | 51 | 76 | 62 | 92 | 50 | 55 |
6 | 13.3 | 19 | 0.03 | 0.76 | 0.005 | 0.13 | 0.248 | 6.3 | 81 | 121 | 94 | 140 | 65 | 75 |
4 | 21.2 | 19 | 0.04 | 1.02 | 0.006 | 0.15 | 0.317 | 8.05 | 129 | 192 | 151 | 225 | 85 | 95 |
2 | 33.6 | 19 | 0.04 | 1.02 | 0.006 | 0.15 | 0.375 | 9.53 | 205 | 305 | 232 | 345 | 115 | 130 |
1 | 42.4 | 19 | 0.05 | 1.27 | 0.007 | 0.18 | 0.427 | 10.85 | 258 | 384 | 296 | 440 | 130 | 145 |
1/0 | 53.5 | 19 | 0.05 | 1.27 | 0.007 | 0.18 | 0.466 | 11.84 | 326 | 485 | 368 | 548 | 150 | 170 |
2/0 | 67.4 | 19 | 0.05 | 1.27 | 0.007 | 0.18 | 0.509 | 12.93 | 411 | 612 | 457 | 680 | 175 | 195 |
3/0 | 85 | 19 | 0.05 | 1.27 | 0.007 | 0.18 | 0.557 | 14.15 | 518 | 771 | 570 | 848 | 200 | 225 |
4/0 | 107 | 19 | 0.05 | 1.27 | 0.007 | 0.18 | 0.612 | 15.54 | 653 | 972 | 711 | 1058 | 230 | 260 |
250 | 127 | 37 | 0.06 | 1.52 | 0.008 | 0.2 | 0.694 | 17.63 | 772 | 1149 | 850 | 1265 | 255 | 290 |
300 | 152 | 37 | 0.06 | 1.52 | 0.008 | 0.2 | 0.747 | 18.97 | 926 | 1378 | 1011 | 1505 | 285 | 320 |
350 | 177 | 37 | 0.06 | 1.52 | 0.008 | 0.2 | 0.797 | 20.24 | 1081 | 1609 | 1173 | 1746 | 310 | 350 |
400 | 203 | 37 | 0.06 | 1.52 | 0.008 | 0.2 | 0.842 | 21.39 | 1235 | 1838 | 1334 | 1985 | 335 | 380 |
500 | 253 | 37 | 0.06 | 1.52 | 0.008 | 0.2 | 0.925 | 23.5 | 1544 | 2298 | 1656 | 2464 | 380 | 430 |
600 | 304 | 61 | 0.07 | 1.78 | 0.009 | 0.23 | 1.024 | 26.01 | 1853 | 2758 | 1996 | 2970 | 420 | 475 |
750 | 380 | 61 | 0.07 | 1.78 | 0.009 | 0.23 | 1.126 | 28.6 | 2316 | 3447 | 2478 | 3688 | 475 | 535 |
1000 | 507 | 61 | 0.07 | 1.78 | 0.009 | 0.23 | 1.275 | 32.39 | 3088 | 4595 | 3283 | 4886 | 545 | 615 |