I. Basic Definition and Characteristics of THHN Wire
THHN Wire, full name is Thermoplastic High Heat-resistant Nylon coated Wire. This wire stands out for its unique thermoplasticity and high heat-resistant properties.THHN wire is usually made of one or more fine copper wires stranded together and covered with a thermoplastic high heat-resistant nylon jacket, which has good insulating properties and abrasion resistance.
The main characteristics of THHN wire include:
1. high heat resistance: it can maintain stable electrical performance in higher temperature environments, and can usually withstand temperatures as high as 150°C to 200°C. 2. good electrical performance: it has the ability to withstand temperatures as high as 150°C to 200°C, and can be used in a variety of applications.
2. good electrical properties: excellent electrical conductivity and insulation properties, which can effectively reduce power loss and improve the safety of electrical systems.
3. Strong abrasion resistance: The outer nylon sheath has good abrasion resistance and protects the internal copper wires from external physical damage.
4. Good flexibility: THHN wire has good flexibility, which is easy for installation and wiring.
|
MM2
|
AWG/kcmil
|
Diameter of
|
Min.No
|
Insulation
|
JACKET
|
Diam.
|
Approx.
|
NEC
|
|
|
conductor
|
of wire
|
Thickness
|
THICKNESS
|
Wt.
|
|||||
|
–
|
–
|
–
|
mm
|
n
|
mm
|
mm
|
mm
|
Kg/km
|
Ampacity
|
|
2.08
|
14
|
AWG
|
1.85
|
7
|
0.38
|
0.1
|
2.8
|
25
|
20
|
|
3.31
|
12
|
AWG
|
2.32
|
7
|
0.38
|
0.1
|
3.3
|
37
|
25
|
|
5.26
|
10
|
AWG
|
2.95
|
7
|
0.51
|
0.1
|
4.2
|
59
|
35
|
|
8.37
|
8
|
AWG
|
3.71
|
7
|
0.76
|
0.13
|
5.5
|
96
|
50
|
|
13.3
|
6
|
AWG
|
4.67
|
7
|
0.76
|
0.13
|
6.5
|
145
|
65
|
|
21.2
|
4
|
AWG
|
5.89
|
7
|
1.02
|
0.15
|
8.2
|
232
|
85
|
|
26.7
|
3
|
AWG
|
6.6
|
7
|
1.02
|
0.15
|
8.9
|
285
|
100
|
|
33.6
|
2
|
AWG
|
7.42
|
7
|
1.02
|
0.15
|
9.8
|
352
|
115
|
|
42.4
|
1
|
AWG
|
8.43
|
19
|
1.27
|
0.18
|
11.3
|
452
|
130
|
|
53.5
|
1/0
|
AWG
|
9.45
|
19
|
1.27
|
0.18
|
12.4
|
559
|
150
|
|
67.4
|
2/0
|
AWG
|
10.62
|
19
|
1.27
|
0.18
|
13.5
|
692
|
175
|
|
85
|
3/0
|
AWG
|
11.94
|
19
|
1.27
|
0.18
|
14.8
|
860
|
200
|
|
107
|
4/0
|
AWG
|
13.41
|
19
|
1.27
|
0.18
|
16.3
|
1068
|
230
|
|
127
|
250
|
kcmil
|
14.6
|
37
|
1.52
|
0.2
|
18
|
1279
|
255
|
|
152
|
300
|
kcmil
|
16
|
37
|
1.52
|
0.2
|
19.4
|
1516
|
285
|
|
177
|
350
|
kcmil
|
17.3
|
37
|
1.52
|
0.2
|
20.7
|
1751
|
310
|
|
203
|
400
|
kcmil
|
18.49
|
37
|
1.52
|
0.2
|
21.9
|
1995
|
335
|
|
228
|
450
|
kcmil
|
19.61
|
37
|
1.52
|
0.2
|
23.1
|
2229
|
380
|
|
253
|
500
|
kcmil
|
20.65
|
37
|
1.52
|
0.2
|
24.1
|
2463
|
420
|
II.Application Scenarios of THHN Wire
Due to its excellent performance and wide applicability, THHN Wire is widely used in building, industrial and household electrical systems. For example, in high-rise buildings, THHN Wire can be used for wiring electrical equipment such as switchboards, lighting equipment and air-conditioning systems; in industrial production lines, it can be used for connecting electric motors, control equipment and instrumentation; and in home environments, THHN Wire can be used for wiring sockets, switches and lighting fixtures.
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