Southwire 14/2 Solid Copper UF-B Underground Feeder Cable with Ground 250-Foot Roll – Model 13054255

The Southwire 14/2 UF-B is the residential underground feeder cable specifically engineered for direct burial underground installations and outdoor branch circuit applications. As a 14/2 underground feeder cable, this product delivers the two-conductor 15-amp circuit configuration that handles outdoor lighting circuits, landscape lighting feeders, detached garage and shed branch circuits, well pump installations, and similar 15-amp outdoor electrical applications. As a direct burial wire 250 ft roll, the Southwire 14/2 UF-B can be installed underground without conduit protection where permitted by local code, which significantly simplifies trenching and installation labor compared to running THHN-in-conduit underground. As Southwire 13054255, this specific SKU is a default specification for residential outdoor wiring projects because of the combination of trusted Southwire manufacturing, the right 14/2 configuration for 15-amp circuits, and the project-scale 250-foot roll length that matches typical outdoor lighting and landscape installation consumption. As UF-B outdoor electrical cable, the Southwire 14/2 UF-B features the solid PVC fill construction and sunlight-resistant moisture-resistant outer jacket that distinguishes UF-B cable from indoor-only NM-B Romex, allowing direct exposure to soil moisture, root pressure, and UV sunlight without the protection of conduit. Every Southwire 14/2 UF-B 250 ft roll ships nationwide from IB Lighting with free freight. Manufacturer specifications are available at the official Southwire website.

Southwire 14/2 UF-B Key Highlights

What UF-B Cable Is (And Why It Differs From NM-B Romex)

UF-B stands for Underground Feeder, type B, and it is fundamentally different from the indoor NM-B Romex that most residential electrical work uses. Understanding what UF-B is and how it differs from Romex is essential because using the wrong cable type in an outdoor or buried application creates code violations and creates safety hazards over time.

UF-B cable is designed specifically for these installation environments: direct burial underground (without conduit), outdoor exposed runs in sunlight, damp and wet locations, and outdoor branch circuits that connect to equipment in landscape and yard environments. The cable jacket is specifically formulated with UV inhibitors and moisture-resistant compounds that survive long-term outdoor exposure. The conductor insulation is rated for wet locations. The internal construction prevents water migration through the cable jacket into electrical boxes and devices.

NM-B Romex cable is designed for indoor dry-location installations only. The Romex jacket is not UV-resistant; sunlight exposure degrades the jacket over time, eventually cracking and exposing the conductors to weather. The internal construction does not resist water migration; if moisture enters Romex cable, it can wick along the cable interior and emerge inside electrical boxes potentially causing GFCI nuisance trips, corrosion, or shock hazards. Romex is NOT approved for outdoor exposure, direct burial, or wet locations under any circumstances.

The Southwire 14/2 UF-B is the right cable for any outdoor or buried application that residential electrical work commonly requires. For indoor framing applications, the equivalent Southwire 14/2 NM-B Romex SIMpull 250 ft is the correct specification. Each is the appropriate product for its specific environment, and they are NOT interchangeable.

Solid PVC Fill Construction: The Defining Difference

The most distinctive physical difference between UF-B cable and NM-B Romex is the internal construction. UF-B uses solid PVC fill that encapsulates all conductors throughout the entire cable cross-section, while NM-B uses a loose-fill construction where the conductors are bundled inside an outer jacket but not encapsulated in solid PVC.

For UF-B, the solid PVC fill serves several practical functions. First, it eliminates voids inside the cable that could fill with water during underground installation. Water migration through cable interiors is a well-documented failure mode in outdoor electrical installations using improper indoor cable; the water travels along the cable interior, emerges inside electrical boxes, and creates corrosion, GFCI trips, and potential shock hazards. The solid PVC fill in UF-B prevents this entirely.

Second, the solid PVC construction provides superior mechanical protection against ground pressure, root growth, and the gradual settling of soil over buried cable. Underground installations subject the cable to constant mechanical stresses that the solid construction handles meaningfully better than loose-fill construction.

Third, the solid construction creates a continuous physical barrier between the conductors and any environmental moisture, even if the outer jacket is somehow penetrated by a sharp object or aggressive root system. The redundant protection provides genuine reliability margin for underground installations that are typically not inspected once buried.

When working with the Southwire 14/2 UF-B during installation, the solid PVC fill construction is immediately apparent at any cut cable end: the cross-section shows solid PVC material surrounding each conductor and filling all gaps, with no air spaces or loose construction. This is a useful visual confirmation that you have the correct cable type for outdoor installation.

14/2 With Ground Configuration: The 15-Amp Outdoor Circuit Standard

The Southwire 14/2 UF-B contains three conductors in the standard 14/2 with ground configuration: one black 14 AWG insulated conductor (the hot leg), one white 14 AWG insulated conductor (the neutral), and one bare 14 AWG copper grounding conductor. This is the right configuration for typical 15-amp outdoor branch circuits.

The 14 AWG conductor size is sized for 15-amp circuit protection, which covers nearly all residential outdoor electrical applications. Landscape lighting circuits typically draw small currents per fixture (LED landscape lights often draw under 1 amp each, allowing 12+ fixtures on a single 15-amp circuit). Outdoor receptacle circuits operate at 15 amps for most general-purpose applications. Detached shed or small outbuilding feeders for basic lighting and one or two receptacles fit comfortably within 15-amp capacity.

For higher-current outdoor applications, larger gauge UF-B is required:

• 12/2 UF-B: 20-amp circuits for higher-draw outdoor receptacles, larger landscape installations, or detached building subpanels with moderate loads.
• 10/2 UF-B: 30-amp circuits for outdoor 240V equipment like pool pumps, hot tubs, or larger detached building subpanels.
• 8/2 UF-B and larger: 40-amp+ circuits for detached garage subpanels, well pumps with starting surges, or larger outdoor electrical loads.

For the Southwire 14/2 UF-B specifically, the 15-amp circuit capacity matches the dominant outdoor electrical use case. For projects requiring higher current capacity, browse the broader IB Lighting electrical wire collection for larger UF-B gauges.

Direct Burial: What That Code Designation Allows

The “direct burial” rating on the Southwire 14/2 UF-B is the regulatory designation that allows the cable to be installed underground without conduit protection in approved residential applications. This rating has specific code implications that determine where and how the cable can be installed.

Direct burial means the cable can be placed directly in a trench dug to the required depth and backfilled with soil, with no conduit, raceway, or sleeve required to protect the cable underground. This is a significant labor and material savings compared to installations requiring conduit, where the conduit itself must be installed first, then the wire pulled through the conduit. For typical residential outdoor lighting projects covering 50 to 250 feet of cable run, direct burial UF-B eliminates conduit work entirely.

Code limitations on direct burial: the cable must be installed at the minimum required depth for residential applications (typically 24 inches for 120V circuits, with exceptions detailed in NEC Article 300.5), the cable cannot be subject to physical damage at the surface (it must transition into rigid metal conduit or equivalent protection where it emerges from the ground), and the cable must be GFCI-protected at the panel for outdoor receptacle and lighting circuits per NEC Article 210.8.

Direct burial is permitted in most residential outdoor applications including landscape lighting circuits, exterior receptacle circuits to garden areas, detached garage feeders, shed and outbuilding power, well pump circuits, and pool deck lighting (outside the equipotential bonding zone). It is generally NOT permitted in commercial installations (where conduit is typically required), in areas subject to vehicular traffic (where physical damage risk is higher), or in installations requiring future cable changes (where conduit accessibility is preferred).

The Southwire 14/2 UF-B is specifically the right product for the residential direct-burial applications listed above. For commercial outdoor installations or any project requiring conduit, Southwire 12 AWG THHN in conduit (with appropriate fittings and seal-offs) is the correct alternative.

NEC Depth Requirements for Buried Cable

The National Electrical Code (NEC) specifies minimum burial depths for direct-buried cable, and these depth requirements are routinely verified by electrical inspectors before backfill occurs. Understanding the depth requirements helps you plan trench excavation correctly the first time.

NEC Article 300.5 depth requirements for 120V/240V residential direct burial:

• Direct burial without conduit (this product): Minimum 24 inches of cover.
• Direct burial under residential driveways: Minimum 18 inches plus 4 inches of concrete or equivalent above the cable.
• Direct burial under concrete slabs: Minimum 18 inches.
• Underground installation in PVC conduit: Minimum 18 inches of cover (which is part of why some installations choose conduit over direct burial).
• Underground installation in rigid metal conduit: Minimum 6 inches of cover.

For typical residential landscape lighting and outdoor electrical projects using the Southwire 14/2 UF-B direct burial, the 24-inch depth requirement governs the trench excavation. Many homeowners and contractors find this depth requirement surprising on first projects because 24 inches is more than the “couple of inches” many DIY projects attempt. Inspectors specifically check depth during permitted installations, and shallow burial is the most common reason for inspection failure on outdoor electrical work.

Frost line considerations: in cold-climate regions, the burial depth should also be below the local frost line to prevent ground heaving from damaging the cable during winter freeze-thaw cycles. Northern US frost lines extend 30 to 48 inches below grade in the coldest regions, exceeding the NEC 24-inch minimum. Check your local frost line requirement before excavation.

For projects where deeper trenching is impractical or impossible, installing the wire in PVC conduit (which allows 18-inch burial depth) is the alternative. The conduit option requires additional materials and labor but reduces the required excavation depth.

Common Applications for the Southwire 14/2 UF-B

The Southwire 14/2 UF-B serves the residential outdoor electrical applications that dominate yard, landscape, and detached building installations. The most common projects include:

• Landscape lighting circuits: Direct-buried feeder from the house panel to a transformer or junction box that powers low-voltage landscape lighting (12V LED fixtures, path lights, accent lights, uplighting on trees and architectural features). Typical run 50 to 200 feet.
• Outdoor lighting circuits: Direct-buried feeder for line-voltage outdoor lights including post lamps, driveway lighting, security lighting on detached buildings, and similar 120V outdoor fixtures. Typical run 50 to 150 feet.
• Detached shed and outbuilding power: Branch circuit from the house panel to a small shed, outbuilding, or workshop providing basic lighting and one or two receptacles. The Southwire 14/2 UF-B handles the 15-amp circuit capacity needed for these small detached structures. Typical run 50 to 250 feet.
• Detached garage subpanel feeders (smaller installations): 15-amp feeder to a small detached garage with basic lighting and limited receptacle work. Larger garages require larger UF-B (12/2 for 20-amp, 10/2 for 30-amp).
• Outdoor receptacle circuits: Direct-buried feeders to outdoor garden receptacles, patio receptacles for seasonal use, or yard outlets for power tools and seasonal equipment. GFCI protection required per NEC.
• Pool deck lighting (outside bonding zone): Lighting circuits for pool deck areas that are outside the equipotential bonding zone defined by NEC for pool installations. Inside the bonding zone, special requirements apply.
• Garden water feature circuits: Power for garden pumps, fountain pumps, and similar low-power water feature equipment. GFCI protection required.
• Patio and deck lighting: Direct-buried run from the house panel to outdoor patio or deck areas to power overhead lighting, string light circuits, and similar exterior entertainment lighting.

For higher-current outdoor applications (pool pumps, hot tubs, larger detached garages with significant equipment, well pumps with starting surges), step up to larger gauge UF-B cable. The Southwire 14/2 UF-B handles the 15-amp applications that dominate residential outdoor electrical work.

Outdoor and Landscape Lighting Circuits

Outdoor and landscape lighting is the most common application for the Southwire 14/2 UF-B in residential installations. Understanding how typical landscape lighting projects use UF-B helps you plan your specific installation.

The basic landscape lighting installation pattern: a 15-amp circuit from the house panel runs via the Southwire 14/2 UF-B through a trench to a strategic location in the yard where a landscape lighting transformer is installed. The transformer converts the 120V line voltage to 12V low-voltage for the actual landscape light fixtures. From the transformer, low-voltage cable (typically 12 AWG or 14 AWG outdoor lighting cable) distributes power to individual landscape lights. The 12V low-voltage portion of the system does not require deep burial (typically buried 6 inches deep is adequate), so the deep 24-inch burial requirement applies only to the 120V UF-B portion from the house to the transformer.

For typical residential landscape lighting projects covering an average yard, the Southwire 14/2 UF-B run from house to transformer location is 50 to 150 feet. The 250-foot roll covers most projects with material remaining for service loops, repair runs, or future expansion. For larger properties or projects with multiple transformer locations, multiple rolls may be required.

For pure line-voltage outdoor lighting (without transformer step-down to low-voltage), the Southwire 14/2 UF-B serves each individual lighting fixture or light cluster directly. This is common for outdoor security lighting, post lamps, and decorative line-voltage landscape lights. The 15-amp circuit capacity handles many line-voltage fixtures on a single circuit because each fixture typically draws under 1 amp.

Important: outdoor lighting circuits require GFCI protection at the panel breaker or at the first outlet in the circuit per NEC Article 210.8. Even when using direct-buried UF-B cable specifically rated for outdoor exposure, the GFCI requirement still applies. Verify GFCI protection with your installer or include a GFCI breaker as part of the project material list.

Detached Garages, Sheds, and Outbuildings

Detached building electrical feeders are the second major application for the Southwire 14/2 UF-B. Small detached structures (garden sheds, small workshops, pool houses, gazebos) frequently use 14/2 UF-B for basic lighting and receptacle circuits.

The 15-amp circuit capacity of the Southwire 14/2 UF-B is well-suited to small detached buildings with modest electrical loads: a few interior light fixtures, one or two receptacles for occasional tool use, basic ventilation fan, and similar small loads. For these applications, a single 15-amp circuit from the house panel via direct-buried UF-B delivers the complete electrical service to the detached structure.

For larger detached buildings (workshops with table saws and power equipment, detached garages used as workspace, recording studios, or any structure needing more than a few small loads), larger UF-B gauge is required. A 20-amp circuit using 12/2 UF-B handles moderate workshop loads. For detached buildings needing multiple circuits with their own subpanel, a feeder from the house panel using larger UF-B (8/2, 6/2, or larger depending on load) delivers power to a subpanel in the detached structure, from which standard interior branch circuits are run within the building.

Code compliance considerations for detached building circuits: per NEC Article 225, detached structures over a certain size or with specific equipment require their own grounding electrode system and disconnect means at the structure. Code requirements vary based on the type of building (garage vs shed vs accessory dwelling unit), the type of equipment installed, and local jurisdiction rules. Consult your local building department before specifying the circuit configuration for any detached building project.

GFCI Protection: Required for Outdoor Circuits

The Southwire 14/2 UF-B is the right cable for outdoor circuits, but the cable selection is only part of code-compliant outdoor electrical installation. NEC Article 210.8 requires GFCI (Ground Fault Circuit Interrupter) protection for outdoor receptacle circuits, lighting circuits in damp/wet locations, and certain other outdoor applications. Understanding the GFCI requirement helps you plan complete outdoor circuit installations.

GFCI protection options for outdoor circuits using the Southwire 14/2 UF-B:

• GFCI breaker at the main panel: A GFCI-protected breaker installed in the house panel protects the entire outdoor circuit served by the breaker. This is the most common approach and simplest to verify during inspection.
• GFCI receptacle at the first outlet: A GFCI receptacle installed as the first device in the outdoor circuit protects the receptacle itself and all downstream outlets and lighting. Less common for direct-buried installations because the GFCI receptacle would typically be located in a weatherproof box near where the UF-B emerges from the ground.
• GFCI deadfront protection: A GFCI deadfront device installed at the first transition point in the outdoor circuit provides GFCI protection without requiring a receptacle. Used in some specialized installations.

For most installations using the Southwire 14/2 UF-B, the GFCI breaker at the main panel is the simplest approach. The breaker provides GFCI protection for the entire circuit, the device is installed indoors at the panel where it is easy to access and inspect, and the protection covers any outdoor outlets or lighting fixtures regardless of their location.

One important note: GFCI breakers occasionally produce nuisance trips on long underground runs because of capacitive ground leakage that builds up along the cable. If your installation will be very long (200+ feet of UF-B underground), discuss the GFCI sizing with your installer or supplier before committing to the design. Some long-run installations use multiple shorter GFCI-protected sub-circuits to avoid the nuisance trip issue.

Southwire 14/2 UF-B Specifications

Southwire 14/2 UF-B FAQs

Who the Southwire 14/2 UF-B Is Built For

The Southwire 14/2 UF-B serves four clear buyer types. The first is homeowners doing DIY landscape and outdoor electrical projects on their own property. For these buyers, the Southwire 14/2 UF-B is the right cable for the dominant outdoor electrical use cases: landscape lighting, garden lighting, outdoor receptacles, and small detached building circuits. The 250-foot roll matches typical project consumption, and direct burial without conduit simplifies the installation labor for DIY work.

The second buyer is landscape lighting installers and outdoor lighting contractors who do this work professionally. For these contractors, the Southwire 14/2 UF-B is the workhorse cable for residential landscape lighting projects, with the 15-amp circuit capacity handling typical low-voltage transformer feeds and line-voltage fixture runs. Project consumption typically lands in the 150 to 250 foot range, matching the roll size well.

The third buyer is electrical contractors handling residential remodel and addition work where outdoor circuits are part of the scope. For these contractors, the Southwire 14/2 UF-B is the standard specification for outdoor branch circuits, detached building feeders, and yard electrical work that accompanies broader remodel projects. Stocking 250-foot rolls covers most outdoor circuit additions to typical remodel scopes.

The fourth buyer is the detached building electrical installer working on garden sheds, small workshops, pool houses, gazebos, and similar small outdoor structures. For these projects, the Southwire 14/2 UF-B delivers the 15-amp circuit capacity needed for basic lighting and limited receptacle work in small detached structures. Browse the broader IB Lighting electrical wire collection for larger UF-B gauges when projects require higher current capacity.

UF-B vs NM-B Romex: When to Use Each

The single most important distinction for residential wire selection is between UF-B (this product) and NM-B Romex. Using the wrong cable type creates code violations that fail inspection and creates real safety hazards over time as the wrong cable degrades in its intended environment.

Choose the Southwire 14/2 UF-B (this product) when your installation is: outdoor exposed (subject to sunlight, rain, snow, weather), direct buried underground (with appropriate depth and GFCI protection), in damp or wet locations (basements with humidity, mechanical rooms with washdown, etc.), serving outdoor fixtures (landscape lights, post lamps, outdoor receptacles), or feeding detached buildings (sheds, outbuildings, small detached garages).

Choose Southwire 14/2 NM-B Romex like the Southwire 14/2 NM-B Romex SIMpull 250 ft when your installation is: indoor only (within framed walls and ceilings of habitable structures), dry locations only (no exposure to moisture, condensation, or wet conditions), serving indoor fixtures and receptacles, and where conduit is not required by code. NM-B is meaningfully more affordable than UF-B and easier to install, making it the right choice for the indoor dry-location applications it is designed for.

Both cables use the same 14/2 with ground configuration (one hot, one neutral, one ground at 14 AWG), serve the same 15-amp circuits, and use the same termination practices at devices and panels. The only operational difference is the installation environment. Choosing the right cable type for the environment is essential to long-term reliability and code compliance.

UF-B vs THHN in Conduit: Two Approaches to Outdoor Wiring

Within outdoor electrical installations, the Southwire 14/2 UF-B competes against THHN conductors installed inside PVC or rigid metal conduit. Both approaches are NEC-compliant for residential outdoor circuits, and the choice depends on installation labor, design preferences, and specific code requirements.

Choose Southwire 14/2 UF-B when the installation is direct-buried landscape or yard electrical work where conduit would be unnecessary labor, when the run is relatively short (under 250 feet) and the cable matches available roll lengths, when the installation will not require future cable changes (conduit allows changes; direct burial does not), or when the cost-effectiveness of direct burial is meaningful for the project scope.

Choose THHN in conduit like the Southwire 12 AWG THHN in PVC or rigid metal conduit when the installation specifically requires conduit (commercial outdoor work, areas subject to physical damage like driveway crossings beyond the protected zones, code-required conduit applications), when future cable changes are anticipated (the conduit provides ongoing accessibility), when the run length is very long and benefits from staged pull access points, or when the design specification calls for conduit-protected wiring.

For most residential outdoor landscape and lighting projects, the Southwire 14/2 UF-B direct burial approach delivers meaningfully better labor economics than conduit installation. For specific scenarios where conduit is required or preferred, THHN-in-conduit is the appropriate alternative.

Installation Best Practices for the Southwire 14/2 UF-B

Installing the Southwire 14/2 UF-B for outdoor and underground residential circuits follows specific best practices that protect the cable’s long-term performance and ensure code compliance. Most installation issues are preventable with proper planning and execution.

Plan the trench route: Mark the planned trench route before excavation. Avoid running parallel to or crossing other underground utilities (gas, water, sewer, communications) where possible. Call before you dig (811 in the US) to identify existing underground utilities before excavating. Maintain proper separation from other utilities per local code.

Excavate to required depth: Trench to 24 inches minimum depth for the cable cover (which means the trench bottom is 24 inches plus cable diameter below grade). For cold-climate installations, excavate below local frost line. Maintain consistent depth throughout the run; depth variations create stress points where the cable may be damaged by ground movement.

Place sand or compacted soil bedding: A 2 to 4 inch layer of sand or fine soil bedding at the bottom of the trench provides cushioning that protects the cable from sharp rocks or debris in the surrounding soil. This is particularly important in rocky or coarse-grained soil environments.

Lay the cable in gentle curves: Do not pull the cable taught against trench walls or sharp corners. Lay the cable with gentle slack so that ground settling over time does not stress the cable. At trench endpoints where the cable transitions to above-ground installations, provide service loops to accommodate future ground movement.

Transition to physical protection above grade: Where the Southwire 14/2 UF-B emerges from the ground at structure walls or device locations, the cable must transition into rigid metal conduit or equivalent physical protection. This protects the cable from being damaged by tools, equipment, or weather at the vulnerable transition point. The conduit transition typically extends from below grade to at least 8 feet above grade or into a protective enclosure.

Install warning tape if required: Some jurisdictions require buried electrical warning tape installed at 12 inches below grade (above the cable but well below the surface) to alert future excavators to the presence of electrical cable. Verify local requirements before backfill.

Backfill carefully: Cover the cable with a 6-inch layer of sand or fine soil, then backfill the remaining trench depth with native soil compacted in 4-inch lifts. Avoid using soil with large rocks or sharp debris in the initial backfill layer above the cable. Final grade should match the surrounding surface elevation.

Test before final backfill: Verify the circuit operates correctly before final backfill. Test for proper continuity, correct polarity, and GFCI operation. Once the trench is backfilled, repairs are significantly more expensive. The test step adds minimal time and prevents many post-install issues.

Browse the complete IB Lighting electrical wire and cable collection, compare with the indoor equivalent Southwire 14/2 NM-B Romex SIMpull 250 ft, consider the conduit alternative Southwire 12 AWG THHN for in-conduit outdoor runs, explore other Southwire products, pair with a Generac standby generator for backup power that keeps outdoor lighting circuits running during outages, or visit our customer FAQ hub. Manufacturer technical sheets are available at the official Southwire website.