THHN wire cable and THWN wire cable are both types of electrical wiring used in USA market. they are Almost identical in appearance, there are some performance differences between the two.
THHN wire stands for Thermoplastic High Heat-resistant Nylon-coated. It is primarily used for dry locations and is resistant to heat and oil. Meanwhile, THWN stands for Thermoplastic Heat and Water-resistant Nylon-coated. It is designed to withstand both heat and moisture, making it suitable for use in both wet and dry locations.
Another difference between the two is their voltage rating. THHN is typically rated for lower voltages, around 600 volts, while THWN is rated for higher voltages, up to 1,000 volts.
Overall, both THHN and THWN are high-quality wiring options, but they are designed for different applications. When choosing between the two, it's important to consider the environment where the wiring will be installed and the voltage requirements of the system.
THHN/THWN nylon sheathed wire and cable is a type of American standard wire and cable that complies with UL standard UL83
