Single Conductor Electrical Wires THHN THWN THW in AWG Standard1.Application:1Type TW THW THHN THWN TFF building wire is intended for general purpose applications as defined by the National Electrical Code (NEC)Type TW THW THHN THWN TFF is permitted for new construction or rewiring for 60volt appl......

| AWG/MCM | mm2 | Conductor | Insulation | Shealth | Total Weight | |||||||||
| Single Wire | OD. | PVC | Nylon | |||||||||||
| No. | Dia. | thick | min | min | OD. | Thick mils | mm | OD. | ||||||
| mm | mm | mil | mm | mm | mil | mm | mm | mil | mm | mm | kg/km | |||
| 16 | 1.31 | 1 | 1.29 | 1.29 | 15 | 0.38 | 0.51 | 14 | 0.36 | 2.05 | 4 | 0.1 | 2.25 | 16.73 |
| 14 | 2.08 | 1 | 1.626 | 1.626 | 15 | 0.38 | 0.51 | 14 | 0.36 | 2.386 | 4 | 0.1 | 2.586 | 24.53 |
| 12 | 3.29 | 1 | 2.048 | 2.048 | 15 | 0.38 | 0.51 | 14 | 0.36 | 2.808 | 4 | 0.1 | 3.008 | 36.61 |
| 10 | 5.26 | 1 | 2.589 | 2.589 | 20 | 0.51 | 0.64 | 19 | 0.48 | 3.609 | 4 | 0.1 | 3.809 | 58 |
| 16 | 1.67 | 7 | 0.551 | 1.653 | 15 | 0.38 | 0.51 | 14 | 0.36 | 2.413 | 4 | 0.1 | 2.613 | 21.5 |
| 14 | 2.08 | 7 | 0.615 | 1.845 | 15 | 0.38 | 0.51 | 14 | 0.36 | 2.605 | 4 | 0.1 | 2.805 | 25.84 |
| 12 | 3.30 | 7 | 0.775 | 2.325 | 15 | 0.38 | 0.51 | 14 | 0.36 | 3.085 | 4 | 0.1 | 3.285 | 38.51 |
| 10 | 5.26 | 7 | 0.978 | 2.934 | 20 | 0.51 | 0.64 | 19 | 0.48 | 3.954 | 4 | 0.1 | 4.154 | 60.82 |
| 9 | 6.63 | 7 | 1.098 | 3.294 | 20 | 0.51 | 0.64 | 19 | 0.48 | 4.314 | 5 | 0.13 | 4.574 | 75.34 |
| 8 | 8.32 | 7 | 1.23 | 3.69 | 30 | 0.76 | 0.9 | 28 | 0.71 | 5.21 | 5 | 0.13 | 5.47 | 98.69 |
| 7 | 10.47 | 7 | 1.38 | 4.14 | 30 | 0.76 | 0.9 | 28 | 0.71 | 5.66 | 5 | 0.13 | 5.92 | 120.76 |
| 6 | 13.21 | 7 | 1.55 | 4.65 | 30 | 0.76 | 0.9 | 28 | 0.71 | 6.17 | 5 | 0.13 | 6.43 | 148.58 |
| 5 | 16.65 | 7 | 1.74 | 5.22 | 30 | 0.76 | 0.9 | 28 | 0.71 | 6.74 | 6 | 0.15 | 7.04 | 183.78 |
| 4 | 21.12 | 7 | 1.96 | 5.88 | 40 | 1.02 | 1.1 | 35 | 0.89 | 7.92 | 6 | 0.15 | 8.22 | 235.76 |
| 2 | 33.54 | 7 | 2.47 | 7.41 | 40 | 1.02 | 1.1 | 35 | 0.89 | 9.45 | 6 | 0.15 | 9.75 | 359.83 |
| 16 | 1.23 | 19 | 0.287 | 1.435 | 15 | 0.38 | 0.51 | 14 | 0.36 | 2.195 | 4 | 0.1 | 2.395 | 16.72 |
| 14 | 2.04 | 19 | 0.37 | 1.85 | 15 | 0.38 | 0.51 | 14 | 0.36 | 2.61 | 4 | 0.1 | 2.81 | 25.35 |
| 12 | 3.30 | 19 | 0.47 | 2.35 | 15 | 0.38 | 0.51 | 14 | 0.36 | 3.11 | 4 | 0.1 | 3.31 | 38.27 |
| 10 | 5.19 | 19 | 0.59 | 2.95 | 20 | 0.51 | 0.64 | 19 | 0.48 | 3.97 | 4 | 0.1 | 4.17 | 59.86 |
| 9 | 6.50 | 19 | 0.66 | 3.3 | 20 | 0.51 | 0.64 | 19 | 0.48 | 4.32 | 5 | 0.13 | 4.58 | 73.64 |
| 8 | 8.17 | 19 | 0.74 | 3.7 | 30 | 0.76 | 0.9 | 28 | 0.71 | 5.22 | 5 | 0.13 | 5.48 | 95.16 |
| 7 | 10.53 | 19 | 0.84 | 4.2 | 30 | 0.76 | 0.9 | 28 | 0.71 | 5.72 | 5 | 0.13 | 5.98 | 120.74 |
| 6 | 13.19 | 19 | 0.94 | 4.7 | 30 | 0.76 | 0.9 | 28 | 0.71 | 6.22 | 5 | 0.13 | 6.48 | 145.02 |
| 5 | 16.45 | 19 | 1.05 | 5.25 | 30 | 0.76 | 0.9 | 28 | 0.71 | 6.77 | 6 | 0.15 | 7.07 | 180.78 |
| 4 | 21.13 | 19 | 1.19 | 5.74 | 40 | 1.02 | 1.1 | 35 | 0.89 | 7.78 | 6 | 0.15 | 8.08 | 229.38 |
| 3 | 26.40 | 19 | 1.33 | 6.45 | 40 | 1.02 | 1.1 | 35 | 0.89 | 8.49 | 6 | 0.15 | 8.79 | 280.88 |
| 2 | 33.58 | 19 | 1.5 | 7.26 | 40 | 1.02 | 1.1 | 35 | 0.89 | 9.3 | 6 | 0.15 | 9.6 | 350.23 |
| 1 | 42.12 | 19 | 1.68 | 8.15 | 50 | 1.27 | 1.38 | 45 | 1.14 | 10.69 | 7 | 0.18 | 11.05 | 447.22 |
| 1/0 | 53.30 | 19 | 1.89 | 9.14 | 50 | 1.27 | 1.38 | 45 | 1.14 | 11.68 | 7 | 0.18 | 12.04 | 555.15 |
| 2/0 | 67.07 | 19 | 2.12 | 10.3 | 50 | 1.27 | 1.38 | 45 | 1.14 | 12.84 | 7 | 0.18 | 13.2 | 687.52 |
| 3/0 | 84.53 | 19 | 2.38 | 11.6 | 50 | 1.27 | 1.38 | 45 | 1.14 | 14.14 | 7 | 0.18 | 14.5 | 854.27 |
| 4/0 | 107.18 | 19 | 2.68 | 13 | 50 | 1.27 | 1.38 | 45 | 1.14 | 15.54 | 7 | 0.18 | 15.9 | 1068.65 |
| 250 | 125.72 | 37 | 2.08 | 14.2 | 60 | 1.52 | 1.67 | 55 | 1.4 | 17.24 | 8 | 0.2 | 17.64 | 1272.29 |
| 300 | 151.06 | 37 | 2.28 | 15.5 | 60 | 1.52 | 1.67 | 55 | 1.4 | 18.54 | 8 | 0.2 | 18.94 | 1512.81 |
| 350 | 177.29 | 37 | 2.47 | 16.8 | 60 | 1.52 | 1.67 | 55 | 1.4 | 19.84 | 8 | 0.2 | 20.24 | 1761.4 |
| 400 | 202.53 | 37 | 2.64 | 17.9 | 60 | 1.52 | 1.67 | 55 | 1.4 | 20.94 | 8 | 0.2 | 21.34 | 1999.42 |
| 500 | 252.89 | 37 | 2.95 | 19.7 | 60 | 1.52 | 1.67 | 55 | 1.4 | 22.74 | 8 | 0.2 | 23.14 | 2470.99 |
| 600 | 304.24 | 61 | 2.52 | 22 | 70 | 1.78 | 1.94 | 65 | 1.65 | 25.56 | 9 | 0.23 | 26.02 | 2998.91 |
| 650 | 328.87 | 61 | 2.62 | 22.9 | 70 | 1.78 | 1.94 | 65 | 1.65 | 26.46 | 9 | 0.23 | 26.92 | 3231.59 |
| 750 | 378.30 | 61 | 2.81 | 24.6 | 70 | 1.78 | 1.94 | 65 | 1.65 | 28.16 | 9 | 0.23 | 28.62 | 3697.59 |
| 1000 | 506.04 | 61 | 3.25 | 28.4 | 70 | 1.78 | 1.94 | 65 | 1.65 | 31.96 | 9 | 0.23 | 32.42 | 4896.32 |
| TW THW 600V 60ºC UL 83 UL 1581 Type TW and THW may be used for general purpose wiring for power and lighting, for insulation in air, conduit, duct or other recognized raceways, in wet or dry locations. Maximum voltage rating= 600 V | |||
| MAXIMUM CONDUCTOR TEMPERATURE | |||
| type | oil | wet | dry |
| TW | 60ºC | 60ºC | 60ºC |
| THW | 75ºC | 75ºC | 75ºC |
| MTW* | 60ºC | 60ºC | 90ºC |
| * 1AWG AND LARGER ONLY | |||
| AWG/MCM | mm2 | Conductor | Conductor | Insulation | Total Weight | ||||||
| Type | Single Wire | OD. | PVC | kg/km | |||||||
| No. | Dia. | Thick | mm | Thick | min | OD. | |||||
| mils | |||||||||||
| 18 | 0.82 | solid | 1 | 1.02 | 1.02 | 30 | 0.76 | 0.89 | 0.7 | 2.54 | 14.82 |
| 16 | 1.31 | solid | 1 | 1.29 | 1.29 | 30 | 0.76 | 0.89 | 0.7 | 2.81 | 20.27 |
| 14 | 2.09 | solid | 1 | 1.63 | 1.63 | 30 | 0.76 | 0.89 | 0.7 | 3.15 | 28.6 |
| 12 | 3.33 | solid | 1 | 2.06 | 2.06 | 30 | 0.76 | 0.89 | 0.7 | 3.58 | 41.48 |
| 10 | 5.27 | solid | 1 | 2.59 | 2.59 | 30 | 0.76 | 0.89 | 0.7 | 4.11 | 60.93 |
| 8 | 8.35 | solid | 1 | 3.26 | 3.26 | 45 | 1.14 | 1.22 | 1 | 5.54 | 98.99 |
| 6 | 13.33 | solid | 1 | 4.12 | 4.12 | 60 | 1.52 | 1.67 | 1.4 | 7.16 | 162.23 |
| 4 | 21.16 | solid | 1 | 5.19 | 5.19 | 60 | 1.52 | 1.67 | 1.4 | 8.23 | 240.34 |
| 18 | 0.82 | B | 7 | 0.386 | 1.158 | 30 | 0.76 | 0.89 | 0.7 | 2.678 | 15.65 |
| 16 | 1.31 | B | 7 | 0.488 | 1.464 | 30 | 0.76 | 0.89 | 0.7 | 2.984 | 21.43 |
| 14 | 2.08 | B | 7 | 0.615 | 1.845 | 30 | 0.76 | 0.89 | 0.7 | 3.365 | 30.1 |
| 12 | 3.30 | B | 7 | 0.775 | 2.325 | 30 | 0.76 | 0.89 | 0.7 | 3.845 | 43.38 |
| 10 | 5.26 | B | 7 | 0.978 | 2.934 | 30 | 0.76 | 0.89 | 0.7 | 4.454 | 64.02 |
| 8 | 8.32 | B | 7 | 1.23 | 3.69 | 45 | 1.14 | 1.22 | 1 | 5.97 | 103.92 |
| 6 | 13.21 | B | 7 | 1.55 | 4.65 | 60 | 1.52 | 1.67 | 1.4 | 7.69 | 169.62 |
| 4 | 21.12 | B | 7 | 1.96 | 5.88 | 60 | 1.52 | 1.67 | 1.4 | 8.92 | 252.44 |
| 2 | 33.54 | B | 7 | 2.47 | 7.41 | 60 | 1.52 | 1.67 | 1.4 | 10.45 | 379.53 |
| 1 | 42.62 | B | 19 | 1.69 | 8.18 | 80 | 2.03 | 2.11 | 1.8 | 12.24 | 480.75 |
| 1/0 | 53.30 | B | 19 | 1.89 | 9.19 | 80 | 2.03 | 2.11 | 1.8 | 13.25 | 586.71 |
| 2/0 | 67.70 | B | 19 | 2.13 | 10.34 | 80 | 2.03 | 2.11 | 1.8 | 14.4 | 727.52 |
| 3/0 | 85.24 | B | 19 | 2.39 | 11.61 | 80 | 2.03 | 2.11 | 1.8 | 15.67 | 897.84 |
| 4/0 | 107.18 | B | 19 | 2.68 | 13 | 80 | 1.52 | 1.67 | 1.4 | 16.44 | 1097.15 |
| 250 | 126.94 | B | 37 | 2.09 | 14.2 | 95 | 2.41 | 2.56 | 2.2 | 19.02 | 1340.08 |
| 300 | 152.39 | B | 37 | 2.29 | 15.54 | 95 | 2.41 | 2.56 | 2.2 | 20.36 | 1586.07 |
| 350 | 177.29 | B | 37 | 2.47 | 16.79 | 95 | 2.41 | 2.56 | 2.2 | 21.61 | 1825.98 |
| 400 | 202.53 | B | 37 | 2.64 | 17.96 | 95 | 2.41 | 2.56 | 2.2 | 22.78 | 2068.12 |
| 500 | 252.89 | B | 37 | 2.95 | 20.04 | 95 | 2.41 | 2.56 | 2.2 | 24.86 | 2548.31 |
| 600 | 304.24 | B | 61 | 2.52 | 22 | 110 | 2.79 | 2.89 | 2.5 | 27.58 | 3084.92 |
| 750 | 380.99 | B | 61 | 2.82 | 24.64 | 110 | 2.79 | 2.89 | 2.5 | 30.22 | 3816.9 |
| 1000 | 506.04 | B | 61 | 3.25 | 28.4 | 110 | 2.79 | 2.89 | 2.5 | 33.98 | 5002.6 |




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