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SPEC 44066

Southwire® Machine Flex® 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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Construction:

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

Applications and Features:

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.

Specifications:

  • 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

    • Sample Print Legend:

    8AWG-1AWG
    SOUTHWIRE #P# (UL) 1 AWG (42.406 mm2) CU TYPE THHN/THWN-2 600V 90(D)C DRY/90(D)C WET PRI/GRI VW-1 OR AWM [Applicable Styles] OR MTW SUN RES --- (CSA) T90 NYLON OR TWN75 FT1 FT4 --- CE RoHS-2 Made in USA. [SEQUENTIAL FOOTAGE MARKS]

    1/0 AWG - 500 KCMIL
    SOUTHWIRE #P# (UL) 500 KCMIL (253.35mm2) CU TYPE THHN/THWN-2 600V 90(D)C DRY/90(D)C WET PRI/GRI VW-1 FOR CT USE OR AWM [Applicable Styles] OR MTW SUN RES --- (CSA) T90 NYLON OR TWN75 FT1 FT4 --- CE RoHS-2 Made in USA. [SEQUENTIAL FOOTAGE MARKS]

    600 - 1000 KCMIL
    {SQFTG} SOUTHWIRE #P# (UL) XX KCMIL XX STRAND CLASS I (XXMM2) CU TYPE THHN/THWN-2 600V 90ºC DRY/90ºC WET PRI/GRI VW-1 FOR CT USE SUN RES OR AWM 1321 OR MTW --- (CSA) T90 NYLON OR TWN75 FT1 FT4 --- (NOM)-ANCE THWN/THHN 600V 90ºC --- CE RoHS-2 MADE IN USA

    Table 1 – Weights and Measurements
    Stock NumberCond. SizeStrand CountDiameter Over ConductorInsul. ThicknessApprox. ODCopper WeightApprox. WeightJacket Color
    AWG/KcmilNo. of Strandsinchmilinchlb/1000ftlb/1000ft
    TBA81680.153450.2435264BK
    51683526650.302500.402210243
    TBA62730.198600.31889110BK
    67286744130.235400.333130157BK
    66422935250.304400.368169198GN
    45625818360.3500.46260303GN
    6773681/010640.354500.488335381BK
    TBA2/013300.4800.56381433BK
    4571203/016720.533500.601518576BK
    6796074/021090.55500.664665740BK
    6494142506270.605600.747764850BK
    6728663007410.638600.789301020BK
    6494153508930.67600.81210841179BK
    64894850012210.85860115141633BK
    64941660014800.963701.12718602014BK
    64954975018501.094701.25823682541BK
    674459100025161.19701.35430453233BK
    All dimensions are nominal and subject to normal manufacturing tolerances
    ◊ Cable marked with this symbol is a standard stock item
    TBA stock codes are estimations only and actual product may vary. Please wait until a stock code is assigned to purchase connectors and/or fittings.
    Table 2 – Electrical and Engineering Data
    Stock NumberCond. SizeMin Bending RadiusMax Pull TensionDC Resistance @ 25°CAC Resistance @ 75°CInductive Reactance @ 60HzAllowable Ampacity At 60°CAllowable Ampacity At 75°CAllowable Ampacity At 90°C
    AWG/KcmilinchlbΩ/1000ftΩ/1000ftΩ/1000ftAmpAmpAmp
    TBA811320.6660.8270.052405055
    51683521.65300.1790.2160.045115130
    TBA61.32090.4190.520.051556575
    67286741.33330.2630.3260.048708595
    66422931.54200.2110.2620.04785100115
    45625811.86690.1320.1640.046110130145
    6773681/028440.1050.130.044125150170
    TBA2/02.210640.0850.1050.043145175195
    4571203/02.413420.0670.0830.042165200225
    6796074/02.716920.0530.0660.041195230260
    649414250320000.0450.0560.041215255290
    6728663003.124000.0380.0480.041240285320
    6494153503.228000.0320.0410.04260310350
    648948500440000.0220.0290.039320380430
    6494166005.648000.0180.0240.039350420475
    6495497506.360000.0150.0210.038400475535
    67445910006.880000.0110.0160.037455545615
    † Ampacities based upon 2023 NEC Table 310.16 and do not take into account the overcurrent protection limitations in NEC 240.4(D) of 15 Amps for 14 AWG CU, 20 Amps for 12 AWG CU, and 30 Amps for 10 AWG CU (independent of the conductor temperature rating and stranding if size is present in table). Also, see NEC sections 310.15 and 110.14(C) for additional requirements.
    † Ampacities have been adjusted for more than Three Current-Carrying Conductors.
    * Inductive impedance is based on non-ferrous conduit with one diameter spacing center-to-center.

    Stock Codes and Colors

    Size (Strand)BlackRedBrownOrangeYellowGrayGreenPinkPurpleTanGray/PurpleGreen/Yellow
    4 (413)672867674667
    3 (525)664229
    2 (665)516835
    1 (836)456258
    1/0 (1044)674668677368
    2/0 (1330)456257
    3/0 (1672)457120457121664217664220664223664226
    4/0 (2109)679607456271456253456254456255456256679606
    250 (627)649414672218672217672219673792673791677370
    300 (741)672866674116674117674118674120674121
    350 (893)649415138181674662674664674665674666652964672017
    500 (1221)648948646978646979646980646981677701456461456462456463456464646982
    600 (1480)649416678431678432678434678435673748678436
    750 (1850)649549139016677721677722677723677725671518677726
    1000 (2516)674459671527671524671521

    Revision: 1.000.024

    Updated On: Oct. 12, 2026, 11:07 p.m. UTC