THHN/THWN-2 Building Wire

THHN/THWN-2 Building Wire


Phelps Dodge THHN/THWN-2 Wires are made of virgin copper ensuring a smooth flow of electric current. It is designed to meet the highest international standards for quality and safety, making it suitable for a wide range of industrial and residential applications. Phelps Dodge THHN/THWN-2 Wires are durable, strong, and long-lasting. Its insulation is flame retardant which ensures that it can self-extinguish within seconds during fire providing enhanced safety to houses, buildings, and/or any industrial facilities.


  • When used as type THHN/THWN-2, conductors are suitable for use in wet or dry locations at temperatures not to exceed 90°C both dry and wet locations or not to exceed 75°C exposed to oil and gasoline.
  • For 50mm²-500mm², Cable tray (CT) rated THHN/THWN-2 can be installed in Cable Trays


  • The THHN/THWN-2 conductors are designed according to local and internationally recognized and accepted standards: ASTM: B3, B8
  • ASTM: B3, B8
  • Underwriters Laboratory: Listed under file #E-55448 for AWG Conductor sizes
  • PNS: 35, 260, and 1207 Specification
  • PEC 2009 Article 3.18 compliant for Cable tray
  • NEC Article 318 compliant for Cable tray


  • Designed to operate at a maximum conductor temperature of 90°C both for wet and dry locations
  • Higher cable ampacity
  • Available in six standard colors (red, black, white, green, yellow, and blue)
  • Jacketed with nylon for mechanical protection; greater resistance against abrasion, resistance to petroleum by-products, chemical agents and oils, and termite resistant.
  • With sequential cable marker printed on the cable surface for sizes 38mm² up to 500mm² to indicate the length of the cable, act as cable usage reference and for inventory control
  • Residential Homes
  • Residential & Commercial Buildings (Mixed Use)
  • Industrial/Manufacturing Buildings/Facilities
  • Power Utliities
  • Distributions/Transmissions
  • Power Generation/Industrial Plants/Renewables
  • Telcoms Distribution
  • Data Centers
  • Cell Sites
  • Special Buildings such as infra projects (airports/LRT-Train/Subways)