Thhn 350 Kcmil Stranded Copper Wire 350 Amp Red

Product Description

The THHNCU-GENERIC thhn350mcmstrredmr is a 350 kcmil stranded copper conductor THHN building wire with red PVC thermoplastic insulation and a nylon jacket. Rated for 600 volts and up to 90 degrees C in dry installations, this wire carries up to 350 amps at 90 degrees C, making it suitable for high-ampacity feeder and branch circuit runs. The 37-strand construction improves flexibility during pull-through in conduit. This wire is sold cut to length and is typically installed by licensed electricians on commercial and industrial projects requiring large-gauge conductors.

This wire is used in feeder applications, service entrance runs, and large branch circuits in commercial, industrial, and high-demand residential installations. The THHN rating makes it appropriate for conduit installations in dry environments. The red insulation color supports standard phase identification and color-coding practices used in electrical distribution panels and switchgear. Electricians working on 480-volt and 208-volt three-phase systems commonly specify this conductor size for motor feeders and sub-panel feeds.

Key Features

• 350 kcmil copper conductor with 37-strand construction for improved pull flexibility
• 600-volt rating suitable for commercial and industrial power distribution
• Temperature ratings of 260 amps at 60 degrees C, 310 amps at 75 degrees C, and 350 amps at 90 degrees C
• PVC thermoplastic insulation with nylon jacket for abrasion and moisture resistance
• Red insulation color for phase identification in multi-conductor installations
• Cut-to-length availability reduces waste on large feeder runs

Compatibility

Designed for use in conduit systems requiring THHN-rated 350 kcmil copper building wire rated at 600 volts in dry locations, consistent with NEC ampacity and installation requirements for large-gauge feeder conductors.

Installation Notes

Installation of 350 kcmil THHN wire should be performed by a licensed electrician in accordance with NEC Article 310 and applicable local codes. De-energize and lock out all circuits before making connections. Use appropriately rated wire-pulling lubricant and conduit fill calculations to avoid exceeding conduit capacity. Terminations require lugs or connectors rated for the conductor size and material.