Underground Feeder and Branch Circuit Cable. Applications: Copper UF-B cable is generally used as a circuit to outside loads.It may be used underground, including direct burial. Multiple conductor UF-B cable may be used for interior branch circuit wiring in residential or agricultural buildings at conductor temperatures not to exceed 90°C (with ampacity limited to that for 60°C conductors) as specified by the National Electrical Code. UF-B can be used in applications permitted for NMC in Section 334. 10(B) of the National Electrical Code. Standards & References: ASTM - B3 and B-8 UL Standard 83 UL Standard 493 Federal Specification A-A-59544 National Electrical Code, NFPA 70, 2011 Edition RoHS/ REACH. Construction: Manufactured as a 2 or 3 conductor cable with ground wire. Copper conductors are annealed (soft) copper, solid of compressed stranded. Phase conductors are polyvinyl chloride (PVC) insulated, nylon jacketed, color coded for identification purposes. Jacketed with sunlight and moisture resistant gray PVC. 6 Gauge conductors are stranded ground is 10 gauge solid. This is brand new wire. Please visit my store for more wire types and sizes. BRAND NEW CORD CUT OFF ORIGINAL REEL.