UF Wire

UF wire, often labeled UF-B, is a tough, moisture-resistant underground feeder cable designed for direct burial without conduit. Its solid, sunlight-resistant gray jacket seals each conductor from water and soil, making it a reliable choice for outdoor electrical projects like powering detached garages, sheds, barns, well pumps, exterior receptacles, and landscape features. Compared with NM-B “indoor Romex,” UF-B is rated for wet locations and resists UV, abrasion, and minor impacts, helping maintain circuit integrity in harsh conditions. By eliminating the need for continuous conduit runs, it can reduce installation time and materials while meeting code for many residential applications.

Available in popular sizes such as 14/2 w/ground, 12/2, 12/3, 10/2, and 10/3, UF wire supports common 15–30 amp circuits. Choose the gauge based on the breaker size and total run length to limit voltage drop on long outdoor circuits. Copper conductors deliver dependable performance, and the integrated bare or green ground simplifies terminations at weatherproof boxes and GFCI outlets. For transitions above grade or where physical protection is needed, run UF cable inside PVC or metal conduit for the exposed section and use listed fittings.

Helpful tips for a smooth install:
- Call 811 before you dig and map the route away from landscaping hazards.
- Verify local code, burial depth requirements, and GFCI/AFCI protection rules.
- Use weather-resistant (WR) receptacles, in-use covers, and listed UF cable clamps.
- Protect vertical rises and terminations in conduit; add warning tape above the trench.
- Upsize the wire on extra-long runs to minimize voltage drop for motors and tools.

Whether you need 12/2 UF cable for an outdoor receptacle circuit or 10/3 UF-B for a small outbuilding subfeed, quality underground feeder wire offers durable, code-compliant power delivery from the house to the load. Shop UF wire and accessories for fast, safe installs.