Meet a dependable copper solution for clean, durable electrical grounding and outdoor readiness: Southwire’s 25 ft. 4 Solid Bare Copper Building Wire. This solid, bare conductor is built for reliability in challenging environments, delivering a clear path for grounding and essential electrical runs both indoors and outdoors.
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Solid 4 AWG bare copper conductor provides low resistance and rugged durability, ensuring stable conductivity and secure connections.
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Direct burial capable and listed for safety in outdoor installations when installed per applicable codes and standards.
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Flame retardant and copper ground construction reinforce safety and integrity in building applications requiring a copper grounding path.
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UL Listed with a 600 V rating and 90°C temperature rating to support a range of building and service applications.
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Indoor and outdoor use with a metallic appearance, suitable for projects where a bare copper conductor is appropriate.
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25 ft length provides flexible, short-run installation options without excessive waste or splicing.
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Grounding-focused design—copper ground path and copper conductors—ideal for grounding electrode conductors and equipment grounding in various building systems.
Why choose this bare copper building wire
For projects where a bare, uninsulated copper conductor is required, this Southwire option delivers dependable performance with clear advantages over alternatives. The solid copper core minimizes resistive losses, while the bare construction keeps installation straightforward in appropriate applications. With direct burial compatibility, you have a versatile choice for outdoor grounding runs or service installations, all backed by UL listing for added peace of mind.
Practical use cases
- Grounding electrode conductor installations for outdoor service panels and equipment.
- Outdoor machinery and equipment grounding paths where a bare copper conductor is permitted.
- Short, direct burial runs in outdoor setups, provided they meet local electrical codes.
- Indoor grounding applications requiring a robust copper path with minimal impedance.
Specs at a glance
- Brand: Southwire
- Product Type: Building Wire (bare copper, solid conductor)
- Conductor Gauge: 4 (4 AWG)
- Conductor Material: Copper
- Insulation Jacket: None (bare conductor)
- Direct Burial: Yes
- Flame Retardant: Yes
- Ground Material: Copper
- Number of Conductors: 1
- Temperature Rating: 90°C
- Voltage Rating: 600 V
- UL Listed: Yes
- Length: 25 ft
- Color: Metallic (bare copper appearance)
- Indoor/Outdoor: Indoor and Outdoor
Choose Southwire 25 ft. 4 Solid Bare Copper Building Wire when you need a reliable, copper-only pathway for grounding and essential building wiring. Its solid conductor design, combined with direct burial readiness and UL safety certification, helps you tackle outdoor and indoor applications with confidence while keeping installation clean and straightforward.
