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Solid THHN/THWN-2 WireFrom $0.20/ft -
Solid THHN/THWN-2 WireFrom $0.20/ft - Solid THHN/THWN-2 WireFrom $0.20/ft
- Solid THHN/THWN-2 WireFrom $0.20/ft
Parent SKU : TW350-4
SKU : TW350-4-250
Engineered for extreme durability and continuous heavy-duty power distribution, this 350 MCM 4-Conductor Type W Portable Power Cable is built to withstand relentless jobsite punishment. Rated for continuous 2000V operation, this industrial-grade trailing cable features fully flexible tinned copper conductors insulated with high-dielectric Ethylene Propylene Rubber (EPR) and encased in a heavy-duty Chlorinated Polyethylene (CPE) thermoset outer jacket.
Whether powering heavy mining machinery, mobile compressors, high-capacity temporary generators, or 4-wire power distribution panels, this cable delivers unyielding mechanical impact resistance, extreme cold flexibility down to -40°C, and superior defense against oil, heat, flame, and sunlight.
Extra-Flexible High-Strand Tinned Copper: Built with 888 fine strands of soft-drawn tinned copper (ASTM B33) per conductor, giving you maximum flexibility around tight corners while preventing copper oxidation and corrosion at lugs and terminations.
Ultra-Rugged Thermoset CPE Jacket: Heavy-duty Chlorinated Polyethylene (CPE) outer sheath provides extreme protection against severe mechanical impact, sharp rock abrasion, crushing, fuels, solvents, and aggressive chemicals.
Extreme Weather & UV Protection (-40°C to +90°C): Highly resistant to ozone, UV sunlight, weather, open flames (FT1/FT5), and shallow water immersion. It stays completely pliable in sub-zero freezing cold down to -40°C while delivering full 90°C wet/dry thermal protection.
2000V Heavy-Duty Power Capacity: High-grade Ethylene-Propylene Rubber (EPR) insulation delivers high dielectric strength and reliable 2000V power density without thermal breakdown.
Color-Coded Conductors: Features color-coded conductors (Black, White, Red, Green) for fast, error-free phase, neutral, and ground identification during complex panel hookups.
Anti-Slipping Core Construction: Built with rubber fillers and a heavy-duty internal binder tape that locks the inner conductors to the outer jacket. This prevents internal slippage, conductor twisting, and sleeve bunching when dragging the cable across job sites or pulling under high tension.
Voltage Rating: 2000 Volts (Type W)
Conductor Size: 350 MCM
Number of Conductors: 4 Conductors (Black, White, Red, Green)
Conductor Stranding: 888 Strands (Tinned Soft-Drawn Annealed Copper)
Insulation Material: Ethylene Propylene Rubber (EPR)
Nominal Insulation Thickness: 0.095 inches (2.41 mm)
Jacket Material: Black Heavy-Duty Chlorinated Polyethylene (CPE)
Nominal Outer Diameter: 2.83 inches (71.8 mm)
Approximate Net Weight: 7,069 lbs per 1,000 ft (10,519 kg/km)
Allowable Ampacity: 433 Amps @ 90°C
Minimum Bending Radius: 6 x Outer Diameter (16.98 inches / 430.8 mm)
Temperature Rating: -40°C to +90°C (Wet or Dry)
Compliance & Approvals: UL 44, UL 1650, ASTM B-33, CSA C22.2 No.96-17, MSHA (P-7K-268101), UL E207132 (Oil & Sun Res), FT1/FT5 Flame Test, RoHS Compliant.
4-Wire Temporary Power Distribution: Feeding high-amperage 3-phase temporary power panels, portable generators, and transformers requiring a dedicated neutral and equipment ground.
Mining & Heavy Industrial Equipment: Powering mobile mining machinery, heavy conveyors, shuttle cars, and plant equipment where bare grounding conductors are not required.
Marine & Offshore Facilities: Shore-to-ship power transfers and dockside electrical connections requiring shallow water immersion and oil/sunlight resistance.
Entertainment & Mobile Generators: Supplying high-amperage 4-wire power feeds for large outdoor events, theatrical staging, and mobile utility rigs.
Disclaimer: All values are nominal and subject to standard manufacturing tolerances. Always verify local AHJ, NEC, and engineering guidelines prior to installation.
| Wire Size (AWG/MCM) | 350 MCM |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 888 |
| Outer Diameter (OD) (in/mm) | 2.83 in / 71.8 mm |
| Jacket Type | Black heavy duty CPE thermosetting compound |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | (EPR) Ethylene-propylene rubber |
| Voltage Rating | 2000V |
| Ampacity Rating | 433 |
| Submersible | No |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | UL: E207132 - Oil Resistant Oil Resistant Inners, Sunlight resistant 90°C Wet or Dry C(UL): E207132, FT1, FT5 -40°C to +90°C MSHA: P-7K-268101 |
| Miscellaneous Information | Ampacities based on 90ºC Conductor and 30ºC Ambient temperature per table 400.5(A)(2) of the National Electrical CodeGreen conductor for grounding conductor purpose only |
| Other Certifications | MSHA |
| RoHS Compliance | Yes |
| Primary Applications | Type W cable is a heavy-duty, flexible portable power cable engineered for demanding industrial, commercial, and temporary power applications, thanks to its robust construction and high 2000 voltage rating. |
| Common Uses |
|
| Weight per Foot | 7.137 lb |
Disclaimer: Application examples are for planning purposes only. Verify exact job specifications, local AHJ regulations, and NEC guidelines with a licensed engineer or electrician prior to installation.
In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.
You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.
Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.
Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.
Orders on any items with a material value of $50 or less are non-returnable.
Parent SKU : TW350-4
SKU : TW350-4-250
Parent SKU : TW350-4
SKU : TW350-4-250
Engineered for extreme durability and continuous heavy-duty power distribution, this 350 MCM 4-Conductor Type W Portable Power Cable is built to withstand relentless jobsite punishment. Rated for continuous 2000V operation, this industrial-grade trailing cable features fully flexible tinned copper conductors insulated with high-dielectric Ethylene Propylene Rubber (EPR) and encased in a heavy-duty Chlorinated Polyethylene (CPE) thermoset outer jacket.
Whether powering heavy mining machinery, mobile compressors, high-capacity temporary generators, or 4-wire power distribution panels, this cable delivers unyielding mechanical impact resistance, extreme cold flexibility down to -40°C, and superior defense against oil, heat, flame, and sunlight.
Extra-Flexible High-Strand Tinned Copper: Built with 888 fine strands of soft-drawn tinned copper (ASTM B33) per conductor, giving you maximum flexibility around tight corners while preventing copper oxidation and corrosion at lugs and terminations.
Ultra-Rugged Thermoset CPE Jacket: Heavy-duty Chlorinated Polyethylene (CPE) outer sheath provides extreme protection against severe mechanical impact, sharp rock abrasion, crushing, fuels, solvents, and aggressive chemicals.
Extreme Weather & UV Protection (-40°C to +90°C): Highly resistant to ozone, UV sunlight, weather, open flames (FT1/FT5), and shallow water immersion. It stays completely pliable in sub-zero freezing cold down to -40°C while delivering full 90°C wet/dry thermal protection.
2000V Heavy-Duty Power Capacity: High-grade Ethylene-Propylene Rubber (EPR) insulation delivers high dielectric strength and reliable 2000V power density without thermal breakdown.
Color-Coded Conductors: Features color-coded conductors (Black, White, Red, Green) for fast, error-free phase, neutral, and ground identification during complex panel hookups.
Anti-Slipping Core Construction: Built with rubber fillers and a heavy-duty internal binder tape that locks the inner conductors to the outer jacket. This prevents internal slippage, conductor twisting, and sleeve bunching when dragging the cable across job sites or pulling under high tension.
Voltage Rating: 2000 Volts (Type W)
Conductor Size: 350 MCM
Number of Conductors: 4 Conductors (Black, White, Red, Green)
Conductor Stranding: 888 Strands (Tinned Soft-Drawn Annealed Copper)
Insulation Material: Ethylene Propylene Rubber (EPR)
Nominal Insulation Thickness: 0.095 inches (2.41 mm)
Jacket Material: Black Heavy-Duty Chlorinated Polyethylene (CPE)
Nominal Outer Diameter: 2.83 inches (71.8 mm)
Approximate Net Weight: 7,069 lbs per 1,000 ft (10,519 kg/km)
Allowable Ampacity: 433 Amps @ 90°C
Minimum Bending Radius: 6 x Outer Diameter (16.98 inches / 430.8 mm)
Temperature Rating: -40°C to +90°C (Wet or Dry)
Compliance & Approvals: UL 44, UL 1650, ASTM B-33, CSA C22.2 No.96-17, MSHA (P-7K-268101), UL E207132 (Oil & Sun Res), FT1/FT5 Flame Test, RoHS Compliant.
4-Wire Temporary Power Distribution: Feeding high-amperage 3-phase temporary power panels, portable generators, and transformers requiring a dedicated neutral and equipment ground.
Mining & Heavy Industrial Equipment: Powering mobile mining machinery, heavy conveyors, shuttle cars, and plant equipment where bare grounding conductors are not required.
Marine & Offshore Facilities: Shore-to-ship power transfers and dockside electrical connections requiring shallow water immersion and oil/sunlight resistance.
Entertainment & Mobile Generators: Supplying high-amperage 4-wire power feeds for large outdoor events, theatrical staging, and mobile utility rigs.
Disclaimer: All values are nominal and subject to standard manufacturing tolerances. Always verify local AHJ, NEC, and engineering guidelines prior to installation.
| Wire Size (AWG/MCM) | 350 MCM |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 888 |
| Outer Diameter (OD) (in/mm) | 2.83 in / 71.8 mm |
| Jacket Type | Black heavy duty CPE thermosetting compound |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | (EPR) Ethylene-propylene rubber |
| Voltage Rating | 2000V |
| Ampacity Rating | 433 |
| Submersible | No |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | UL: E207132 - Oil Resistant Oil Resistant Inners, Sunlight resistant 90°C Wet or Dry C(UL): E207132, FT1, FT5 -40°C to +90°C MSHA: P-7K-268101 |
| Miscellaneous Information | Ampacities based on 90ºC Conductor and 30ºC Ambient temperature per table 400.5(A)(2) of the National Electrical Code Green conductor for grounding conductor purpose only |
| Other Certifications | MSHA |
| RoHS Compliance | Yes |
| Primary Applications | Type W cable is a heavy-duty, flexible portable power cable engineered for demanding industrial, commercial, and temporary power applications, thanks to its robust construction and high 2000 voltage rating. |
| Common Uses |
|
| Weight per Foot | 7.137 lb |
Disclaimer: Application examples are for planning purposes only. Verify exact job specifications, local AHJ regulations, and NEC guidelines with a licensed engineer or electrician prior to installation.
In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.
You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.
Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.
Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.
Orders on any items with a material value of $50 or less are non-returnable.
Get notified when this product is back in stock
Physical Specifications
Technical Specifications
Usage & Installation:
Packaging & Dimensions:
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Multi-conductor 350 MCM-4C Type W cable is a heavy-duty 2000V portable power cable designed for high-amp four-wire temporary power distribution, dynamic portable equipment, industrial pumps, and mobile machinery. Common uses include 3-phase generator tails with dedicated neutral and ground, heavy motor leads, shipyard power, and temporary jobsite distribution panels. Explore our complete Type W cable collection for additional conductor counts and sizes.
Per NEC Table 400.5(A)(2) and manufacturer specifications, a 350 MCM 4-conductor Type W cable rated at 90°C carries a maximum continuous ampacity of 433 Amps in free air (based on a 30°C ambient temperature with standard multi-conductor derating applied). Always check derating factors and local electrical codes for your specific setup.
Yes. Type W cable features an extra-heavy-duty CPE jacket and EPR insulation rated for shallow water immersion, as well as wet or dry environments from -40°C to +90°C. It handles continuous UV sunlight, ozone, oils, and aggressive jobsite chemicals without breaking down.
No. Under NEC Article 400, multi-conductor flexible portable power cords are restricted to temporary power distribution and equipment leads. Unlike single-conductor Type W (which carries a dual RHH/RHW-2 building wire rating), multi-conductor Type W cannot be pulled through permanent building conduit or raceways.
350 MCM 4-Conductor Type W uses 888 fine strands of tinned copper per conductor for extra flexibility around tight corners. With a minimum bending radius rating of 6 times the overall outer diameter (2.83" OD), this cable requires a minimum bending radius of 16.98 inches (430.8 mm) for safe field routing.
While both are extra-heavy-duty 2000V portable power cables built with flexible tinned copper, EPR insulation, and a rugged CPE thermoset jacket, their grounding construction differs:
The four conductors inside a 350 MCM-4C Type W cable are color-coded Black, White, Red, and Green for clear circuit identification. Per UL and CSA standards, the Green conductor is designated specifically for equipment grounding purposes.
Wire America supplies heavy-duty Type W portable power cable directly to electrical contractors, plant operators, equipment OEMs, rental fleet managers, and event power technicians. When you source through us, you get:
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