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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Application & 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

Select a set of products below for more information:

	Cond. Size	Conductor Number	Cond. Strands	Diameter Over Conductor (in) (cm)	Inner Layer Thickness (mils) (mm)	Approx. OD (in) (cm)	Approx. Weight (lbs/1000') (kgs/km)
More Options	4/0 AWG 4/0 AWG	1.0 1.0	2109 2109	0.550 1.40	60 1.52	0.664 1.69	746 1110
More Options	250 KCMIL 250 KCMIL	1.0 1.0	627 627	0.605 1.54	70 1.78	0.747 1.90	857 1275
More Options	350 KCMIL 350 KCMIL	1.0 1.0	893 893	0.670 1.70	60 1.52	0.812 2.06	1172 1744
More Options	500 KCMIL 500 KCMIL	1.0 1.0	1221 1221	0.858 2.18	70 1.78	0.998 2.53	1641 2442
More Options	600 KCMIL 600 KCMIL	1.0 1.0	1480 1480	0.963 2.45	70 1.78	1.127 2.86	2033 3025
More Options	750 KCMIL 750 KCMIL	1.0 1.0	1850 1850	1.094 2.78	80 2.03	1.258 3.20	2569 3823
More Options	300 KCMIL 300 KCMIL	1.0 1.0	741 741	0.638 1.62	70 1.78	0.780 1.98	1024 1524

	Cond. Size	DC Resistance at 25C (ohms/1000') (ohms/km)	AC Resistance at 75C (ohms/1000') (ohms/km)	Inductive Reactance (ohms/1000') (ohms/km)	Max Pull Tension (lbs) (kg)	Min. Bend Radius (in) (cm)	Allowable Ampacity Raceway 75C	Allowable Ampacity Raceway 90C
More Options	4/0 AWG 4/0 AWG	0.057 0.08	0.069 0.10	0.041 0.06	1692 767.48	2.6 6.60	230 230	260 260
More Options	250 KCMIL 250 KCMIL	0.047 0.07	0.057 0.08	0.041 0.06	2000 907.18	2.9 7.37	255 255	290 290
More Options	350 KCMIL 350 KCMIL	0.033 0.05	0.042 0.06	0.040 0.06	2800 1270.06	3.2 8.13	310 310	350 350
More Options	500 KCMIL 500 KCMIL	0.023 0.03	0.031 0.05	0.039 0.06	4000 1814.37	3.9 9.91	380 380	430 430
More Options	600 KCMIL 600 KCMIL	0.019 0.03	0.027 0.04	0.039 0.06	4800 2177.24	5.6 14.22	420 420	475 475
More Options	750 KCMIL 750 KCMIL	0.016 0.02	0.024 0.04	0.038 0.06	6000 2721.55	6.2 15.75	475 475	535 535
More Options	300 KCMIL 300 KCMIL	0.039 0.06	0.048 0.07	0.041 0.06	2400 1088.62	3.1 7.87	285 285	320 320

† 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.

Size (Strand)	Black	Red	Brown	Orange	Yellow	Gray	Green	Pink	Purple	Tan	Gray/Purple	Green/Yellow
4 (413) 4 (413)	672867 672867						674667 674667
3 (525) 3 (525)							664229 664229
2 (665) 2 (665)
1 (836) 1 (836)							456258 456258
1/0 (1044) 1/0 (1044)							674668 674668					677368
2/0 (1330) 2/0 (1330)							456257 456257
3/0 (1672) 3/0 (1672)			664217 664217	664220 664220	664223 664223	664226 664226
4/0 (2109) 4/0 (2109)	679607		456253 456253	456254 456254	456255 456255		456256 456256					679606 679606
250 (627) 250 (627)	649414		672218 672218	672217 672217	672219 672219	673792 673792	673791 673791					677370 677370
300 (741) 300 (741)	672866		674116 674116	674117 674117	674118 674118	674120 674120	674121 674121
350 (893) 350 (893)	649415	138181 138181	674662 674662	674664 674664	674665 674665	674666 674666	652964 652964					672017 672017
500 (1221) 500 (1221)	648948		646978 646978	646979 646979	646980 646980	646981 646981	677701 677701	456461 456461	456462 456462	456463 456463	456464 456464	646982 646982
600 (1480) 600 (1480)	649416		678431 678431	678432 678432	678434 678434	678435 678435	673748 673748					678436 678436
750 (1850) 750 (1850)	649549		677721 677721	677722 677722	677723 677723	677725 677725	671518 671518					677726 677726
1000 (2516) 1000 (2516)	674459 674459

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

Construction

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

Resources

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Southwire® Machine Flex® Power PVC THHN