| 详细介绍：
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
|
| 
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