Product Information

Specification

1000 MCM THHN THWN-2 Stranded Copper Building Wire

Allowable Ampacity:

• 455 Amps for General Applications (60°C)

• 545 Amps in Wet Locations (75°C)

• 615 Amps in Dry Locations (90°C) (for derating purposes only).

Description

1000 MCM THHN/THWN-2 stranded copper wire is designed for THHN (thermoplastic high heat-resistant nylon, dry) and THWN-2 (wet) applications. The "W" indicates water resistance, making it suitable for wet or damp environments when installed in conduit. Supporting up to 600 volts, this wire operates at temperatures up to 90°C. The flame-retardant PVC jacket resists sunlight, moisture, and chemicals, ensuring durability in challenging conditions. Commonly used for large-scale industrial systems, power distribution, and commercial applications, this wire is available in 25 ft, 50 ft, 100 ft, 250 ft, 500 ft, or by the foot for custom lengths.

What are the Applications of 1000 MCM THHN Wire?

• Service Entrance Wires: Powering large industrial and commercial facilities.

• Main Feeder Wires: Distributing power to major subpanels and distribution systems.

• Heavy-Duty HVAC Systems: Supporting large-scale heating, cooling, and ventilation units.

• Industrial Equipment: Delivering power to high-current production lines and heavy machinery.

• Underground Installations: Suitable for conduit applications when double-rated as THWN.

• Power Distribution: Ensuring reliable power for large factories, campuses, and multi-building complexes.

Also Known As

1000 MCM copper wire, THHN #1000 MCM wire, 1000 MCM stranded copper building wire, 1000 gauge stranded wire, 1000 conduit wire, 1000 nylon-insulated copper wire, 1000 THHN wire, 1000 THHN/THWN-2 wire, 1000 thermoplastic high heat-resistant wire, 1000 PVC-coated wire, 1000 nylon-jacketed wire, 1000 MCM THHN stranded wire by the foot, 1000 MCM THHN stranded wire 500 ft, 1000 annealed copper stranded wire.

Construction of THHN 1000 MCM Stranded Wire

• Conductor:
  Flexible annealed copper conductor as per ASTM B3 and ASTM B8.

• Insulation:
  Durable, flame-retardant PVC jacket that resists sunlight and is lead-free.

• Outer Jacket:
  A tough, abrasion-resistant nylon jacket.

Standards for THHN/THWN-2 1000 MCM Wire

• ICEA S-73-532

• UL 1277 (Resistant to flame, moisture, and sunlight)

• UL 1581, UL 83, UL 1063, UL 758

• ASTM B3 and B8 conductor standards

• ANSI/NFPA 70 for Safe Electrical Design and Installation

• RoHS compliant

• Approved for NEC Class I and II systems and Division 2 hazardous locations

• Allowed for Exposed Run (ER) and complies with NEC regulations

• Complies with A-A59544 specifications for durability and safety

Specifications of 1000 MCM THHN Wire

• Size (AWG): 1000 MCM

• Weight per 1,000 ft: 3,263 lbs

• Outside Diameter: 1.310 inches

• Conductors: Annealed Soft Copper per ASTM B3 and ASTM B8

• Insulation: PVC

• Insulation Thickness (mils): 70

• Nylon Thickness (mils): 9

• Jacket: PVC

*Data provided on this page is subject to change based on different manufacturers' variances

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