1. UF-B Wire
UF-B stands for Underground Feeder-B, a type of electrical cable designed for direct burial or installation in wet environments. Compared to standard NM-B indoor wiring, UF-B cables offer:
: The durable PVC jacket prevents moisture penetration, making it ideal for underground or damp locations.
: The outer layer protects against soil corrosion and minor mechanical damage.
: Available in 2-conductor or 3-conductor configurations for different power requirements.
: Can be safely installed underground without additional conduit.
UF-B cables are widely used for residential, commercial, and outdoor power applications, including lighting, outlets, pumps, and high-power equipment.
2. UF-B Wire
2.1 UF B wire 12/2
: 12/2 indicates 12-gauge wire with 2 conductors (1 hot, 1 neutral, plus ground).
: Residential lighting, outlets, and low-power outdoor devices.
: Affordable, easy to install, suitable for standard household needs.
2.2 UF Cable 10/2
: 10/2 indicates 10-gauge wire with 2 conductors, capable of handling higher current.
: Air conditioners, water heaters, outdoor power tools, and landscape lighting.
: High current capacity, ideal for long runs with reduced voltage drop.
2.3 UF Cable 10/3
: 10/3 indicates 10-gauge wire with 3 conductors (2 hot, 1 neutral, plus ground), suitable for split-phase or high-power equipment.
: EV charging stations, outdoor kitchens, and large pump systems.
: Provides split-phase power and supports heavy loads with flexible installation options.
| 12/2 | 2 | 20A | Indoor/outdoor low-power | |
| 10/2 | 2 | High-power appliances | 30A | |
| 10/3 | 3 | Split-phase equipment | 30A |
Choosing the correct UF-B wire specification ensures electrical safety and long-term reliability.
3. Installation and Safety Tips
: UF-B cables can be buried directly in the ground, with a recommended depth of at least 18 inches (45 cm).
: Avoid contact with sharp objects and corrosive soil to prolong cable life.
: Confirm the wire gauge matches the load to prevent overloading.
:
Low-power devices: uf b wire 12/2
High-power devices: uf cable 10/2
Split-phase or high-load devices: uf cable 10/3
All connections should use waterproof junction boxes and proper grounding to prevent electrical hazards.
4. UF-B vs Other Wiring Types
NM-B Cable: Designed only for dry indoor environments; cannot be buried.
UF-B Cable: Suitable for outdoor and underground use; waterproof and corrosion-resistant.
:
UF-B: Durable, direct burial capability, higher cost.
NM-B: Affordable, easy to install, indoor use only.
UF-B wiring is the optimal choice for outdoor and underground installations requiring long-term reliability and safety.
Dongguan Greater Wire & Cable Co., Ltd.serves the global power system with UL wire as its core product. We focus on product durability, safety and market adaptability, and have won wide acclaim. Dongguan Greater Wire & Cable Co., Ltd.is a high-quality UL wire supplier. Contact us now to obtain technical information and market support solutions.