Underground feeder cable built for direct burial is the backbone of any serious outdoor electrical project — whether you are running power to a shed, a well pump, or a string of landscape lights. The wrong choice means brittle PVC jackets that crack under soil pressure, voltage drop over long runs, and copper that does not deliver the full 30-amp capacity your 10-gauge circuit demands.
I’m Min — the co-founder and writer behind Gadgets Feed. I have spent hundreds of hours cross-referencing AWG gauge tolerances, insulation jacket composition, and UL/CSA certification lists to identify which 10/2 UF-B spools deliver real code-compliant performance without the big-box markup.
This guide breaks down the seven most reliable spools currently available, comparing conductor stranding, jacket durability, and certified ampacity so you can buy with total confidence. The result is a clear, data-backed ranking of the best 10/2 uf wire for any trench depth and any budget.
How To Choose The Best 10/2 UF Wire
Selecting the right underground feeder cable comes down to three non-negotiable factors: conductor material, jacket composition, and certified ampacity. A true 10/2 UF-B cable must handle 30 amps at 600 volts while surviving decades of freeze-thaw cycles in direct earth contact. Skimping on any one spec turns a simple trench into a costly dig-up repair.
Solid vs. Stranded Copper Conductors
Solid 10 AWG copper is stiffer but far more resistant to corrosion wicking through the conductor strands over time — ideal for long, straight underground runs. Stranded copper bends easier when pulling through conduit or tight spaces, but the individual filaments create more surface area that can oxidize in perpetually damp soil. Each buyer must weigh bendability against long-term burial resilience.
PVC Jacket Thickness and UV Resistance
UF-B cable requires a thick, moisture-blocking PVC jacket that meets UL 493 standards for direct burial. Thinner jackets found on budget spools can split under backfill pressure or become brittle after a season of sun exposure on exposed risers. Premium spools often use a higher-durometer compound that stays pliable in cold weather and resists UV degradation when the cable surfaces at the termination point.
Spool Length and Voltage Drop at 30 Amps
For a 30-amp 240-volt circuit, a 100-foot run of 10 AWG copper loses roughly 3 percent voltage — right at the NEC-recommended max. Pushing beyond 150 feet on the same gauge pushes voltage drop past 5 percent, which can cause motor loads like pumps or compressors to overheat. Measure your trench distance before buying; oversizing to 8 AWG for longer runs is sometimes the smarter move than stretching 10/2 UF-B too far.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Southwire 13056722 (50ft) | Premium Mid-Run | Lamp posts & pumps | Multi-strand copper, PVC jacket | Amazon |
| Wirenco 10/2 (100ft) | Best Value Spool | Sheds & RV hookups | Solid copper, 100-ft length | Amazon |
| Stock Wire 10/2 (50ft) | Budget Starter | Short welder runs | Soft annealed copper, 50 ft | Amazon |
| Stock Wire 10/2 (75ft) | Mid-Range Spool | Medium trench projects | 30-strand copper, 75 ft | Amazon |
| Stock Wire 10/2 (150ft) | Long-Range Feeder | Irrigation & sub-panels | 150-ft continuous cut | Amazon |
| Southwire 13056728 (100ft) | Industrial Grade | Solar inverter feeds | Multi-strand, UL listed | Amazon |
| Southwire UF Cable (250ft) | Bulk Install | Large property wiring | 250-ft spool, 34.5 lbs | Amazon |
In‑Depth Reviews
1. Southwire 13056722 10/2WG UF Wire (50ft)
Southwire is the gold standard in UF-B cable, and this 50-foot spool of 10/2WG proves why. The multi-strand copper conductors are wrapped in a UV-stable PVC jacket rated for direct earth burial, meaning this cable survives prolonged sun exposure on exposed risers without turning brittle. Electricians consistently note the jacket strips cleanly without splitting — a time-saver when terminating in a weatherproof junction box.
At only 4.5 pounds, this spool is light enough to hand-carry across a jobsite, yet the ampacity is full 30-amp rated at 600 volts. Reviewers praise it for identical build quality to big-box Southwire stock at a noticeably lower price point. One solar installer reported running 3,000 watts from an inverter to a transfer switch on a 100-foot run without any measurable overheating.
For a premium underground feeder cable that handles lamp posts, pumps, and sub-panel feeds with zero compromises, this Southwire spool is the benchmark. The UL and CSA certifications provide legal peace of mind for code inspections that generic imports lack.
Why it’s great
- Industry-leading PVC jacket resists soil moisture and sunlight
- True 30-amp capacity for 240-volt circuits
- Priced well under big-box retail for identical spec
Good to know
- Multi-strand design is slightly less corrosion-resistant than solid copper for very long-term burial
- 50-foot length may not suit longer trench runs
2. Wirenco 10/2 UF-B Wire (100ft Cut)
Wirenco delivers a 100-foot spool of solid copper 10/2 UF-B that directly competes with the big names at a fraction of the retail cost. The solid conductors are annealed soft copper — code-compliant and easy to work with — while the gray PVC jacket provides full direct-bury protection. Multiple buyers confirm the measured length matches the advertised 100 feet, a detail some budget spools fudge.
Reviewers specifically highlight how this cable handled a full 30-amp RV hookup without voltage sag. The stiffness of solid copper is noticeable — one buyer noted it is harder to bend than 14/2 NM — but that rigidity translates to less shifting in the trench after backfill. For a shed sub-panel or backyard RV pedestal, the combination of solid copper and 100 continuous feet is the sweet spot for value.
Wirenco includes three conductors (two hots plus ground) in the UF-B jacket, fully NEC-compliant for 240-volt applications. If you want a premium-feel cable with solid-conductor longevity and do not want to pay for the Southwire brand tax, this is the spool to grab.
Why it’s great
- Solid copper resists corrosion better than stranded for long-term burial
- 100-foot length hits the voltage-drop sweet spot for most residential runs
- Significantly cheaper per foot than equivalent Home Depot options
Good to know
- Solid copper is stiffer and harder to pull through tight conduit bends
- Less established brand than Southwire or Cerrowire
3. Stock Wire 10/2 UF-B Wire (50ft Cut)
Stock Wire offers the no-frills entry point for a short-run direct burial project at a price that undercuts almost everything on the market. This 50-foot cut uses annealed soft copper conductors in a gray PVC jacket rated for 90°C and 600 volts. The jacket thickness felt adequate during installation — one reviewer described it as “extremely insulated” with each conductor individually encased within the outer sheathing.
Buyers report using it to wire welders and short-distance sub-panel feeds with zero complaints. The cable ships rolled in a square configuration that unspools tangle-free, a small quality-of-life detail that matters when you are working in a muddy trench. For a project with a length under 50 feet, paying more for a longer spool you will not use is wasteful.
The main trade-off is the no-name branding — Stock Wire does not carry the same UL listing pedigree as Southwire. For inspected work, check your local AHJ requirements. For DIY backyard runs with no inspection, this spool delivers full 30-amp capacity at the lowest entry cost.
Why it’s great
- Lowest per-foot cost for short 50-foot runs
- Annealed copper bends easier than solid industrial-grade wire
- Neatly wound for tangle-free payout from the spool
Good to know
- No UL logo on jacket — verify with local code official before use
- Jacket may be slightly thinner than premium Southwire equivalents
4. Stock Wire 10/2 UF-B Wire (75ft Cut)
The 75-foot variant from Stock Wire splits the difference between the budget 50-foot cut and the premium 100-foot spools. It uses a 30-strand copper conductor construction, giving it more flexibility than solid-core wire for trenching around obstacles while still maintaining the full 30-amp 600-volt rating. The slightly longer run still keeps voltage drop under 3 percent for 240-volt loads — well within NEC tolerances.
Customer feedback consistently calls this spool a great price-to-length ratio for medium projects like wiring a detached garage or running power to a backyard shop. The cable arrived in excellent condition and installed without jacket cracking. One DIYer used it successfully for a 75-foot trench to a well pump and noted the voltage drop remained under 2 volts on startup.
While the brand is the same as the budget 50-foot cut, the 30-strand construction adds durability for longer pulls. The PVC jacket feels consistent with other UF-B products in this class, and the spool ships quickly. For anyone whose trench measures between 50 and 75 feet, this is the most efficient buy — no waste, no shortage.
Why it’s great
- 30-strand design offers better flexibility than solid-core for trench bends
- 75 feet is the ideal length for medium residential runs without leftovers
- Quick shipping and accurate cut length every time
Good to know
- Same no-name branding concerns if your project requires full UL traceability
- Stranded copper may wick moisture slightly faster than solid over decades
5. Stock Wire 10/2 UF-B Wire (150ft Cut)
When your trench stretches past 100 feet, the 150-foot Stock Wire spool is the most cost-effective way to avoid splicing in the middle of a run. This continuous 150-foot cut uses annealed soft copper conductors in a thick PVC jacket rated for 600 volts and 90°C. One reviewer confirmed that even at 150 feet, voltage dropped less than 2 volts on a 240-volt irrigation pump circuit — a testament to consistent copper quality along the entire length.
The jacket strips cleanly and the cable is easy to terminate in a sub-panel, per multiple user reports. The spool weighs over 21 pounds, so you will want a helper or a cable cart for the install, but the trade-off is a single uninterrupted feed with no junction boxes buried in the dirt — a major code advantage. For shed sub-panels or large property landscape lighting, this length removes guesswork.
Stock Wire continues to deliver consistent product at prices well below the big-box alternatives. The 150-foot cut matches the quality of the shorter variants but adds the convenience of a single pull for longer distances. Just be aware that at 150 feet on a 30-amp circuit, voltage drop approaches 4.5 percent — still acceptable for most loads, but worth checking the draw of your specific equipment.
Why it’s great
- 150 continuous feet eliminates need for underground splice boxes
- Customer-confirmed voltage drop under 2% on 240V pump circuit
- Excellent per-foot pricing compared to buying two 75-foot spools
Good to know
- Heavy spool — over 21 pounds — requires two-person handling
- Voltage drop at full 30-amp load approaches 4.5% at this length
6. Southwire 13056728 100ft 10/2 AWG Solid UF-B Wire
Southwire’s 100-foot spool of solid 10/2 AWG UF-B is the choice for inspections and professionals who demand full UL listing traceability. The cable is made in the USA and carries the same UPC as the big-box store versions — meaning you get identical industrial-grade PVC jacket and solid copper conductors for less money when ordered online. The jacket resists water ingress and prolonged soil contact better than most budget alternatives.
One solar installer used this cable to feed 4,000 watts from an inverter to a transfer switch with the cable handling 3,000 watts continuously without any heat buildup. The solid copper provides maximum corrosion resistance for decades-long burial, and the jacket is thick enough to survive rocky backfill as long as you lay it on a sand bed as NEC recommends. For permanent installations where you never want to dig again, this spool is the right insurance.
The weight is substantial at 13.3 pounds, but the cable unspools evenly without kinking. For anyone running a 100-foot circuit to a garage, barn, or outdoor solar array, the Southwire 100-foot spool combines professional-grade certification with direct-to-consumer pricing that beats the hardware store every time.
Why it’s great
- Full UL and CSA listing — passes any code inspection
- Solid copper construction for maximum long-burial corrosion resistance
- Same UPC as big-box retail at a significantly lower price
Good to know
- Premium pricing tier — more expensive than generic-brand alternatives
- Solid core is stiff; difficult to pull through multiple 90-degree conduit bends
7. Southwire 250′ 10/2 W/G UF Cable
The 250-foot Southwire spool is the ultimate bulk purchase for large properties, multi-building feeds, or contractors who go through UF-B by the roll. This is the same 10/2 AWG copper UF-B cable that Southwire sells at supply houses, but the 250-foot continuous length means you can run a full-size sub-panel feed across a large lot without splicing. The cable is rated for 600 volts and 30 amps, with the thick gray PVC jacket that defines Southwire’s direct-bury standard.
Buyers who replaced standard NM cable after it rotted in wet ground report that this UF-B handled the moisture without degradation. The weight is substantial at 34.5 pounds — you will need a spool stand or a helper for the pull — but the per-foot cost is the lowest of any option here when bought in bulk. For anyone wiring a new construction property with multiple outdoor runs, the 250-foot spool eliminates the need to buy multiple shorter cuts.
Southwire’s reputation for consistent conductor gauge and jacket thickness means you can trust every foot on the spool. If your project calls for more than 200 feet of total run, this bulk spool will save you money and trips to the store.
Why it’s great
- Lowest per-foot cost of all options when bought in bulk quantity
- 250 continuous feet for large property feeds without underground splices
- Southwire brand trust and UL certification for inspected work
Good to know
- Extremely heavy spool — requires a cable roller or two-person team
- Overkill for anyone running less than 150 total feet of cable
FAQ
Can 10/2 UF-B be buried directly without conduit?
What is the maximum circuit length for 10/2 UF-B at 30 amps?
Is solid or stranded 10/2 UF-B better for ground contact?
Final Thoughts: The Verdict
For most users, the best 10/2 uf wire winner is the Southwire 13056722 50ft because it combines UL-listed industrial-grade construction, a UV-stable PVC jacket, and pricing that undercuts the big-box store — all in a spool that delivers full 30-amp capacity for typical residential underground runs. If you need solid copper for maximum longevity and a 100-foot length that hits the voltage-drop sweet spot, grab the Wirenco 10/2 UF-B 100ft cut. And for bulk installs where per-foot cost matters most, nothing beats the Southwire 250-foot spool.