Product Information

Specification

750 MCM THHN THWN-2 Stranded Copper Building Wire

Allowable Ampacity:

• 400 Amps for General Applications (60°C)

• 475 Amps in Wet Locations (75°C)

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

Description

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

What are the Applications of 750 MCM THHN Wire?

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

• Main Feeder Wires: Supplying power to high-capacity subpanels and distribution systems.

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

• Industrial Equipment: Delivering reliable power to heavy-duty machinery and production lines.

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

• Power Distribution: Providing efficient power for factories, campuses, and large complexes.

Also Known As

750 MCM copper wire, THHN #750 MCM wire, 750 MCM stranded copper building wire, 750 gauge stranded wire, 750 conduit wire, 750 nylon-insulated copper wire, 750 THHN wire, 750 THHN/THWN-2 wire, 750 thermoplastic high heat-resistant wire, 750 PVC-coated wire, 750 nylon-jacketed wire, 750 MCM THHN stranded wire by the foot, 750 MCM THHN stranded wire 500 ft, 750 annealed copper stranded wire.

Construction of THHN 750 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-2 750 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 750 MCM THHN Wire

• Size (AWG): 750 MCM

• Weight per 1,000 ft: 2,480 lbs

• Outside Diameter: 1.170 inches

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

• Number of Strands: 61

• 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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