Prices on Electrical wire fluctuate excessively

Prices on Electrical wire fluctuate excessively based on the price of copper and the commodity marketplace. THHN is the most popular form of building wire it is used in many applications. THHN is used for basic building wire and general purpose wiring. It operates at 90C in dry locations and 75C in wet locations. All THHN has conductors that are derived of soft drawn copper. It has insulation of PVC with a nylon jacket. Type THWN-2 is the standard today although the nomenclature is still spoken of as THHN. Gasoline and oil resistant II. Type MTW 90C Machine tool wire stranded only. THHN is solid up to 2 gauge and then everything beyond is stranded. THHN stands for Thermoplastic High Heat-resistant Nylon Coated. THHN is now manufactured in both copper and aluminum.