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About product and suppliers:
        Alibaba.com offers 3,700 thhn products. About 63% of these are electrical wires, 24% are power cables. 

A wide variety of thhn options are available to you, such as pvc, fep, and etfe. You can also choose from insulated, bare, and high voltage. As well as from copper, copper clad aluminum, and copper clad steel. And whether thhn is heating, overhead, or underground. 

There are 3,709 thhn suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Philippines, and United States, which supply 99%, 1%, and 1% of thhn respectively. 

Thhn products are most popular in Domestic Market, North America, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 2,465 with ISO9001, 1,961 with ISO14001, and 1,716 with OHSAS18001 certification.