Type Uf Cable Sizes

Uf b underground feeder cable is electrical wire that can be buried directly in the ground with or without conduit.

Type uf cable sizes.

Type uf b underground feeder cable has a broad range of usage as defined in article 340 of the national electrical code nec. It is typically used as a feeder or branch circuit cable to extend electrical service underground from a main building to a secondary facility. Wiring buried inside rigid metal rmc or intermediate metal imc conduit must have at least 6 inches of earth cover. Will list the type of cable such as nm b or uf.

Wiring in pvc conduit must have at least. Uf b 6 2 this type is 6 awg with 2 conductors. Billy check the sec cable size table in se cable sizes vs amps for 200a and 150 ft and select a uf or underground feeder rated cable type. It contains a solid strand.

Uf b is typically used as a replacement for nmc. It contains seven strands. Sizing the conductors. This number follows gauge.

Type uf b underground feeder and branch circuit cable is generally used in underground direct burial installations as branch circuits and or feeders to outside floodlights sewer pumps and motors electric gates and other loads typically supplied from a distribution system. The weight per 1 000. The gauge of the individual wires inside the cable such as 14 12 10 etc. It has a ground wire size of 10 bearing the weight of 222 pounds per 1 000 feet.

That s more critical than the number of strands. It has a ground wire size of 10 bearing the weight of 138 pounds per 1 000 feet. The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 volts 60 c through 90 c 140 f through 194 f not more than three current carrying conductors in raceway cable or earth directly buried based on ambient air temperature of 30 c 86 f. Both type uf and type uf b cables are available in different common wire sizes also known as gauges and common wire counts.

For example a 12 gauge wire with a hot and a neutral black and white wire and a ground would be considered a 12 2 uf wire cable. Uf b 8 2 this cable is 8 awg and it also has 2 conductors. Type uf cable is the most commonly used nonmetallic cable for residential outdoor wiring runs. It has a durable nylon jacket that resists abrasion moisture and corrosion.

The national electrical code nec recommends a maximum voltage drop of 3 percent for individual household circuits known as branch circuits this is a good goal to shoot for when sizing the conductors for an underground cable the following are the maximum lengths of cable you can use while still maintaining a 3 percent voltage drop for the given wire size awg and. Type uf b may be installed as interior wiring in wet dry or corrosive locations at temperatures not to exceed 90 c with ampacity limited to that for 60 c conductors as specified by the nec.