Best 6/3 UF Cable Options for Underground Direct Burial Projects
When planning a direct burial electrical feed, selecting the right 6/3 UF-B (Underground Feeder – Direct Burial) cable is essential for safety, durability, and code compliance. This guide compiles five reliable options from reputable brands suitable for outdoor and wet environments. Each product is evaluated for conductor quality, jacket material, and suitability for direct earth burial. Use the buying guide below to compare bundling, length availability, and installation considerations to ensure a compliant, long-lasting installation.
| Product | Brand | Conductor | Length | Jacket |
|---|---|---|---|---|
| NASSAU ELECTRICAL SUPPLY 6/3 UF (100FT) | Nassau Electrical Supply | 6 AWG, 3 conductors | 100 ft | PVC |
| Nassau Electrical Supply 150′ 6/3 UF Cable UF-B WG Wire Direct Burial CU Feeder | Nassau Electrical Supply | 6 AWG, 3 conductors | 150 ft | PVC |
| 6/3 UF-B Wire, Underground Feeder and Direct Earth Burial Cable (75ft) | Stock Wire | 6 AWG, 3 conductors | 75 ft | PVC |
| 6/3 UF-B Wire, Underground Feeder and Direct Earth Burial Cable (100ft Cut) | Stock Wire | 6 AWG, 3 conductors | 100 ft | PVC |
| Wirenco 6/3 UF-B Wire, Underground Feeder and Direct Earth Burial Cable (100Ft Cut) | Wirenco | 6 AWG, 3 conductors | 100 ft | PVC |
NASSAU ELECTRICAL SUPPLY 6/3 UF Cable (100FT)
The Nassau 6/3 UF cable is designed for outdoor direct burial and underground feeder installations. It features annealed copper conductors and a robust PVC jacket suited to wet and corrosive environments. The 6 AWG size provides adequate amperage capacity for typical residential feeders. This 100-foot option is ideal for longer runs without splices, reducing potential failure points in buried settings. Consider trench depth, conduit protection at entry points, and local code requirements when planning installation.
Key features: 6 AWG, three conductors; jacket: PVC; heavy weight per thousand feet suggests sturdy construction for outdoor use. This product is well-suited for direct burial with appropriate protective measures above ground as needed.
Nassau Electrical Supply 150′ 6/3 UF Cable UF-B WG Wire Direct Burial CU Feeder
This 150-foot Nassau UF-B direct burial feeder uses 6 AWG copper conductors arranged for outdoor and wet-location installations. The jacket is PVC and designed to resist moisture intrusion, while the overall cable construction supports long outdoor runs from a utility or panel to a buried subpanel or equipment. Ensure correct burial depth, moisture barriers, and strain relief at termination points to maximize lifespan in soil and exposure to sunlight.
Features to note: three 6 AWG conductors, PVC jacket, suitable for direct burial. The longer length reduces splicing needs on longer properties.
6/3 UF-B Wire (75ft Cut)
Stock Wire’s 75-foot 6/3 UF-B cable is a practical option for shorter runs or residential installations requiring a direct burial feeder. It uses annealed copper conductors for flexibility and reliability in moist environments. The PVC jacket provides basic moisture and chemical resistance, making it suitable for outdoor use with proper burial practices. This length is convenient for smaller properties or for running to exterior equipment like a hot tub or detached garage feeder.
Considerations include ensuring adequate burial depth, securing the conductor from physical damage, and using appropriate protective conduits where required by code.
6/3 UF-B Wire (100ft Cut)
The 100-foot cut variant from Stock Wire provides a medium-length option for direct burial feeders. The three 6 AWG copper conductors and PVC jacket are designed for burial in outdoor soil with resistance to moisture and environmental exposure. This length is flexible for longer yard-to-panel runs without excessive splicing. Proper trenching depth and protective routing at entry points are essential for long-term performance.
Wirenco 6/3 UF-B Wire (100Ft Cut)
Wirenco’s 100-foot direct burial cable features annealed copper conductors and a PVC jacket designed for direct earth burial and outdoor exposure. This option emphasizes flexibility and durability in wet locations while maintaining strength for above-ground protectors and landscape obstacles. It is suitable for feeders to detached garages or outbuildings, provided burial guidelines and correct terminations are followed.
Buying Guide: How To Choose The Right 6/3 UF-B Cable
Key considerations when selecting 6/3 UF-B cable include conductor size, insulation, jacket material, and burial compatibility. The 6 AWG conductors support mid-range feeder loads typical of residential circuits, but always verify the load calculation and local electrical code requirements. A PVC jacket is standard for outdoor and direct burial use due to moisture resistance, UV stability, and abrasion tolerance. Consider the length needed to minimize splices, yet avoid excessive slack that complicates burial and conduit routing.
Installation factors matter: burial depth requirements vary by jurisdiction and soil conditions. Use protective conduit where soil movement or potential damage could occur, and ensure proper strain relief and termination with compatible connectors and boxes. UV exposure at grade level may require additional surface protection or timing for backfilling. Always confirm that the selected cable is rated for wet locations and direct earth burial, and match it to the intended load, distance, and future expansion plans.
Material quality varies by brand and product line. Reputable brands often provide consistent conductor annealing and jacket integrity, which translates to better long-term reliability beneath soil. For longer runs, evaluate the availability of longer continuous lengths to reduce splices and the practicality of reel-based delivery versus pre-cut lengths. Finally, confirm compatibility with your existing panels, disconnects, and outdoor equipment to ensure safe, code-compliant operation.