尼龙护套电线电缆 型号 THHN THWN THWN-2 TFN TFFN 工作条件 90℃ 干 75℃ 干或湿 90℃ 干或湿 90℃干或湿 90℃ 干或湿
（UL认证E210924 ，E246599）
型号及额定工作温度
主要用途及使用特性
尼龙护套电线电缆比普通的PVC绝缘电线电缆具有更优良的电气和物理性能：
尼龙护套电线电缆具有较好的耐热性，在高温下运行失重小的特点，可以提高电线瞬时抗热过载能力，可减缓或降低PVC组份的逸出或迁移。
尼龙护套电线电缆具有耐腐性和自润滑性及耐油的特点。
与同截面的PVC绝缘电线电缆相比，尼龙护套电线电缆具有外径小、重量轻、静磨擦系数小和耐腐蚀等特点，可提高敷设中的安全性和适用性。
尼龙护套线额定工作电压450/750V, 广泛应用于家用电器、航空航天系统、建筑和照明,。
电缆的长期工作温度为90℃或75℃，敷设的温度不低于0℃，弯曲半径应不小于电缆外径的4倍。
TYPE THHN/THWN/THWN-2
Scope
This specification covers type THHN/THWN/THWN-2 cable with soft annealed copper solid or stranded conductor, PVC insulation and nylon jacket, conforming to Standard 83 of Underwriters Laboratories, Inc. They meet the requirements of the VW-1 and CT flame test, gasoline and oil resistant, sunlight resistant. UL file No. E210924.
Application
THHN/THWN/THWN-2 are primarily used in conduit and cable trays for services, feeders and branch circuits in commercial or industrial applications as specified in the National Electrical Code. THHN is rated at a conductor temperature of 90℃ dry, THWN is rated at a conductor temperature of 75℃ dry or wet, THWN-2 is rated at a conductor temperature of 90℃ dry or wet. They are permitted for 600V application.
Construction
Conductors: Soft annealed copper, bare or tinned.
Sizes 14AWG-1000kcmil: Solid or stranded.
Insulation: Flame retardant PVC. Thickness: per UL83.
Jacket: Nylon. Thickness: per UL83.
Information on the cable: AWG or kcmil size, type letters, rated voltage, the name of the manufacturer, UL file number, characteristic, manufacture date, FEET.
Table 1
Type THHN/THWN/THWN-2 Cable Data
Size AWG | Strands No./OD. (mm) | PVC Insulation Average Thickness (mm) | Nylon Jacket Minimum Thickness (mm) | Approx. O.D. (mm) | Max.DC Resistance (20℃, Ω/km) (Bare Copper) | Max.DC Resistance (20℃, Ω/km) (Tinned Copper) |
14 | 1/1.63 | 0.38 | 0.10 | 2.65 | 8.45 | 8.78 |
14 | 7/0.62 | 0.38 | 0.10 | 2.88 | 8.62 | 8.96 |
14 | 19/0.37 | 0.38 | 0.10 | 2.87 | 8.62 | 9.15 |
12 | 1/2.05 | 0.38 | 0.10 | 3.07 | 5.31 | 5.53 |
12 | 7/0.77 | 0.38 | 0.10 | 3.33 | 5.43 | 5.64 |
12 | 19/0.465 | 0.38 | 0.10 | 3.35 | 5.43 | 5.75 |
10 | 1/2.59 | 0.51 | 0.10 | 3.89 | 3.34 | 3.48 |
10 | 7/0.98 | 0.51 | 0.10 | 4.24 | 3.41 | 3.55 |
10 | 19/0.59 | 0.51 | 0.10 | 4.25 | 3.41 | 3.55 |
8 | 7/1.23 | 0.76 | 0.13 | 5.69 | 2.14 | 2.23 |
6 | 7/1.56 | 0.76 | 0.13 | 6.68 | 1.35 | 1.40 |
4 | 7/1.96 | 1.02 | 0.15 | 8.42 | 0.848 | 0.882 |
2 | 7/2.47 | 1.02 | 0.15 | 9.95 | 0.534 | 0.555 |
1/0 | 19/1.89 | 1.27 | 0.18 | 12.51 | 0.335 | 0.349 |
2/0 | 19/2.12 | 1.27 | 0.18 | 13.66 | 0.266 | 0.277 |
3/0 | 19/2.39 | 1.27 | 0.18 | 15.01 | 0.211 | 0.219 |
4/0 | 19/2.68 | 1.27 | 0.18 | 16.46 | 0.167 | 0.172 |
250 | 37/2.08 | 1.52 | 0.20 | 18.16 | 0.142 | 0.147 |
350 | 37/2.47 | 1.52 | 0.20 | 20.89 | 0.101 | 0.105 |
500 | 37/2.95 | 1.52 | 0.20 | 24.25 | 0.0709 | 0.0729 |
750 | 61/2.82 | 1.78 | 0.23 | 29.60 | 0.0472 | 0.0486 |