UF-B Wire Properties
What does UFB mean?
UF-B wire's formal name refers to its uses:
- Underground Feeder and Branch circuit wiring cable
UF-B cable is typically used as an underground feeder cable to distribute power from an existing building to outdoor lighting fixtures, pumps, outbuildings and other outdoor equipment. The cable can also be used as direct burial cable. Its applications are outlined in Article 340 NEC 2008 and NEC 2011. UF-B is rated at 600 volts. Although it is rated at a conductor temperature of 90ºC dry / wet, its ampacity is limited to 60ºC according to the NEC 2008 AND NEC 2011. UF-B may be directly buried or installed where exposed to sunlight. When used as an NM cable it must comply with the requirements in NEC 2008 and NEC 2011 Article 334.
ASTM - B3 and B-8
UL Standard 83
UL Standard 493
Federal Specification A-A-59544
National Electrical Code, NFPA 70, 2011 Edition
Solid annealed soft bare copper per ASTM B3.
Stranded annealed soft bare copper per ASTM B3 and ASTM B8.
Polyvinyl chloride (PVC) with a nylon covering. Color coded phase identification.
Soft bare copper, solid per ASTM B3 and stranded per ASTM B3 and ASTM B8.
Sunlight, moisture and fungus resistant gray PVC.