SPEC 44066 Southwire® MachineFLEX™ Power PVC THHN

90°C Wet or Dry. 600 Volts. Flexible Stranded Copper Conductor. PVC Insulation and Nylon Jacket (THHN/THWN-2). Oil & Gasoline Resistant. Sunlight Resistant. Rated UL VW-1 and CSA FT1 & FT4 Flame Resistant.

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Southwire’s Machine Flex® power cables are suited for use in wet and dry areas, conduits, ducts, troughs, trays, aerial supported by a messenger, and where superior electrical properties are desired. These cables are capable of operating continuously at the conductor temperature not in excess of 90°C for normal operation in wet and dry locations, 130°C for emergency overload, and 150°C for short circuit conditions. 1/0 AWG & Larger rated for CT use.


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Standards & References

  • ASTM B3: Soft or Annealed Copper Wire
  • ASTM B172: Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Copper Conductors
  • ASTM B174: Standard Specification for Bunch-Stranded Copper
  • UL 83: Thermoplastic Insulated Wires and Cables
  • UL 758: Standard for Appliance Wiring Material Style 2463 (80C, 600V)
  • UL 1063: Machine Tool Wiring (MTW)
  • UL 1685: FT4 Vertical-Tray Fire Propagation and Smoke Release Test (1/0 and Larger)
  • ICEA S-95-658: (NEMA WC70) Power Cables Rated 2000 Volts or Less for the Distribution of Electrical Energy
  • CE/RoHS-2: – The CE Marking has been applied solely to express the conformance to the material restrictions identified in the RoHS-2 (2011/65/EU) Directive
  • Made in America:: Compliant with both Buy American and Buy America Act (BAA) requirements per 49 U.S.C. § 5323(j) and the Federal Transit Administration Buy America requirements per 49 C.F.R. part 661


  • Conductor: 8 - 4/0 AWG: Class K, Flexible stranded bare copper. 250 - 750 kcmil: Class I, Flexible stranded bare copper
  • Insulation: Polyvinyl Chloride (PVC) with Nylon sheath


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