Model and Rated Operating Temperature
| Model | THHN | THWN | THWN-2 | TFN | TFFN |
|---|---|---|---|---|---|
| Operating Conditions | 90℃ Dry | 75℃ Dry or Wet | 90℃ Dry or Wet | 90℃ Dry or Wet | 90℃ Dry or Wet |
Primary Uses and Characteristics
THHN, THWN-2, and TFFN nylon jacketed electrical cables offer superior electrical and physical properties compared to ordinary PVC-insulated cables. These cables not only exhibit excellent heat resistance with minimal weight loss at high temperatures, enhancing their instantaneous thermal overload capacity, but also reduce the escape or migration of PVC components.
Moreover, they possess anti-corrosion properties, self-lubrication, and oil resistance. Compared to PVC-insulated cables of the same cross-section, nylon-jacketed cables have a smaller outer diameter, lighter weight, lower static friction coefficient, and stronger corrosion resistance, thus improving safety and applicability during installation.
- Rated Operating Voltage: 450/750V
- Applications: Household appliances, aerospace systems, construction, and lighting sectors.
- Long-term Operating Temperature: For THHN and TFFN models, it is 90℃ or 75℃, with laying temperatures not below 0℃, and bending radii no less than four times the cable's outer diameter.
Standards Implemented
- UL83
- UL62
Construction Specifications and Dimensions (mm)
| Nominal Cross Section (AWG) | Insulation Thickness | Nylon Jacket Thickness | Nominal Cross Section (AWG) | Insulation Thickness | Nylon Jacket Thickness |
|---|---|---|---|---|---|
| 18 | 0.38 | 0.10 | 9-5 | 0.76 | 0.13 |
| 16 | 0.38 | 0.10 | 4-2 | 1.02 | 0.15 |
| 14 | 0.38 | 0.10 | 1-4/0 | 1.27 | 0.18 |
| 12 | 0.38 | 0.10 | 213-500kcmil | 1.52 | 0.20 |
| 11-10 | 0.51 | 0.10 | 501-1000kcmil | 1.78 | 0.23 |
Main Technical Performance
| Test Name | Test Requirement | Measured Result | Standard |
|---|---|---|---|
| Flame Test | Passed | Passed | UL 1581 |
| Water Soak Insulation Resistance Test | Passed | Passed | UL 1581 |
| Winding and Low-Temperature Bending Test | No Cracking | No Cracking | UL 1581 |
| Oil Resistance Test | Passed | Passed | UL 1581 |
Delivery Method
THHN and TFFN nylon jacketed electrical cables are delivered in coils, each unit length being 100m. It allows for short sections no less than 10m, with their quantity not exceeding 10% of the total. Alternatively, delivery can be according to user requirements after negotiation.