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The THHNCU-GENERIC thhn4/0strgrymr is a 4/0 AWG stranded copper conductor THHN building wire with gray insulation, available cut to the length needed for the job. THHN-rated wire is a standard for general-purpose branch circuit and feeder wiring in conduit across residential, commercial, and industrial applications. The stranded construction improves flexibility during pull-through in conduit runs compared to solid conductors. Licensed electricians install this wire as part of NEC-compliant wiring systems where a large-gauge conductor is required for high-ampacity circuits.
This wire is suited for use in dry and damp locations inside conduit or raceways. At 4/0 AWG, it is commonly used for service entrance feeders, sub-panel feeds, large motor circuits, and other high-current applications. The gray insulation color is used in multi-conductor installations to identify a specific conductor role per the installation plan or NEC color-coding conventions. Cut-to-length availability reduces waste on job sites where a full spool is not required.
Designed for use in conduit, raceways, and other THHN-approved wiring methods as defined by the National Electrical Code. Suitable for standard 4/0 AWG lugs, terminals, and connectors rated for stranded copper conductors.
Installation must be performed by a licensed electrician in accordance with applicable NEC requirements and local electrical codes. De-energize and lock out the circuit at the panel before making any connections. Use pulling lubricant approved for THHN insulation when routing wire through conduit runs. Terminate only with connectors and lugs rated for stranded copper at the appropriate conductor size.
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