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The THHNCU-GENERIC thhn3/0strorgmr is a 3/0 AWG stranded copper THHN building wire rated for 600 volts and 90 degrees C in dry environments. The conductor is made up of 19 strands of copper, insulated with PVC thermoplastic and jacketed in nylon, which resists abrasion, moisture, and oil. This wire carries up to 225 amps at 90 degrees C, making it well suited for high-current branch circuits, feeder runs, and service entrance applications. Licensed electricians and electrical contractors are the primary installers. It is sold cut to length, so order the exact footage required for the job.
This wire is used in commercial and residential electrical installations where a high-ampacity conductor is required. Common applications include panel feeders, sub-panel runs, motor circuits, and heavy equipment connections. The orange insulation color provides quick visual identification in conduit runs and junction boxes, which is useful when multiple circuit conductors share the same raceway. THHN is one of the most widely specified wire types under the NEC for conduit installations in dry or damp locations.
Designed for use in conduit or raceway systems requiring THHN-rated conductors per NEC Article 310. Suitable for dry and damp location installations in commercial and residential wiring applications rated up to 600 volts.
Installation must be performed by a licensed electrician in accordance with the NEC and any applicable local codes. De-energize and lock out the circuit or panel before making any connections. THHN wire must be run inside an approved conduit or raceway — it is not rated for direct burial or exposed outdoor use without additional protection. Use appropriate wire-pulling lubricant for long conduit runs to avoid insulation damage during the pull.
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