Thhn 350 Kcmil Stranded Copper Wire Orange 600V Cut to Length

Product Description

The THHNCU-GENERIC thhn350mcmstrorgmr is a 350 kcmil stranded copper THHN building wire rated for 600 volts and 90 degrees C in dry environments. Featuring a 37-strand copper conductor, orange PVC thermoplastic insulation, and a nylon jacket, this wire is designed for use in conduit runs in commercial and industrial electrical installations. Ampacity is 260 amps at 60 degrees C, 310 amps at 75 degrees C, and 350 amps at 90 degrees C. It is available cut to length, making it practical for panel feeds, feeder circuits, and branch circuit wiring where large-gauge conductors are required. Licensed electricians and electrical contractors are the typical installers.

This wire is suited for commercial, industrial, and large residential electrical systems where high-ampacity feeder or branch circuit conductors are required in conduit. The orange insulation aids in color-coding and conductor identification during installation and future service work. Cut-to-length availability reduces waste on job sites where specific run lengths are known in advance. Applications include service entrance feeders, subpanel feeds, motor branch circuits, and similar high-current applications governed by the National Electrical Code.

Key Features

• 350 kcmil stranded copper conductor with 37-strand configuration for flexibility in conduit
• Rated 600 volts with a 90 degrees C dry temperature rating
• Ampacity of 350 amps at 90 degrees C, 310 amps at 75 degrees C, and 260 amps at 60 degrees C
• Orange PVC thermoplastic insulation with nylon jacket for abrasion resistance
• Available cut to length to minimize material waste
• Outer diameter of 797 mil for conduit fill calculations

Compatibility

Designed as an OEM-style replacement and standard-specification THHN building wire suitable for use in conduit systems requiring 350 kcmil copper conductors rated at 600 volts per NEC requirements.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code and applicable local codes. Power must be de-energized and locked out at the source before pulling or terminating conductors. Use appropriately rated conduit, lugs, and termination hardware rated for 350 kcmil conductors and the intended ampacity. Verify conduit fill calculations prior to installation using the 797 mil outer diameter.

Technical Specifications

• Conductor Size: 350 kcmil
• Ampacity: 260 amps at 60 degrees C, 310 amps at 75 degrees C, 350 amps at 90 degrees C
• Voltage Rating: 600 volts
• Temperature Rating: 90 degrees C (Dry)
• Conductor Material: Copper
• Stranding: 37 Strand
• Insulation Material: PVC Thermoplastic
• Jacket Material: Nylon
• Insulation Color: Orange
• Wire Type: THHN
• Outer Diameter: 797 mil
• Weight: 1174 pounds per thousand feet

Standard Information

• Brand: THHNCU-GENERIC
• Manufacturer Part Number: thhn350mcmstrorgmr