Thhn 4 Awg Stranded Black Copper Wire Cut to Length

Product Description

The thhn4strblkmr is a 4 AWG stranded copper THHN building wire available in black insulation, sold cut to length. THHN (Thermoplastic High Heat-resistant Nylon-coated) wire is a standard conductor used in residential and commercial electrical installations inside conduit. The stranded construction provides flexibility during pull-through in conduit runs, and the copper conductor delivers reliable conductivity for branch circuit and feeder wiring applications. Licensed electricians and electrical contractors install this wire in accordance with the National Electrical Code (NEC) for general wiring in dry and damp locations.

This 4 AWG black THHN wire is suited for use in conduit-based wiring systems in residential, commercial, and light industrial settings. Common applications include branch circuits, feeder runs, and panel connections where a 4 AWG conductor is specified. The black insulation color is conventionally used for line-side or phase conductors in single-phase and three-phase systems. Selling by cut length allows electricians to order only what the job requires, reducing waste on smaller or custom conduit runs.

Key Features

• 4 AWG stranded copper conductor for flexibility in conduit installation
• THHN-rated insulation with nylon jacket for heat and moisture resistance in dry and damp locations
• Black insulation for phase or line conductor identification per NEC convention
• Stranded construction eases pulling through conduit bends and long runs
• Cut-to-length format reduces material waste on job-specific conduit runs

Compatibility

Designed for use in conduit systems where 4 AWG THHN copper building wire is specified per NEC requirements for branch circuit and feeder conductor applications.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the NEC and any applicable local electrical codes. De-energize the circuit and verify zero voltage at the panel before pulling or terminating conductors. Use appropriate conduit fill calculations per NEC Article 310 and Article 358 or the applicable conduit article to confirm conduit sizing. Do not exceed the ampacity ratings specified in NEC Table 310.15 for the installed conditions and conductor size.