UF Cable. ”UF” stands for underground feeder; rated for in-ground and damp-area installation. Looks like NM-B cable but the wires are embedded as a group in solid thermoplastic (rather than individually encased in flexible thermoplastic).
What is UF cable used for?
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.
What does UFB wire stand for?
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.
What is the difference between NM and UF wire?
The primary difference between standard NM and underground feeder (UF) cable is in the cable construction. Standard NM cable contains wires that are wrapped with paper and a relatively loose plastic sheath. UF cable has wires that are completely encased in solid plastic.
Can UF-B WIRE be buried?
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.
Can UF cable be used above ground?
The use of UF cable on the exterior surface of buildings or structures is permitted by Sec. If the cable is exposed to physical damage it must be protected in accordance with Sec. 225.20 and the requirements for service cables in Sec.
Can I bury UF cable without conduit?
Bury in the Ground: Dig 24 inches -deep, run direct-bury UF-B wire cable. There’s one restriction: It needs a conduit where the cable is exposed on the outside of the house and to 18 inches below the ground.
What is UF electrical?
uF refers to the size of the capacitor. Capacitance is the charge that is necessary to raise the potential of a body one unit. A capacitance of 1 farad (f) requires 1 coulomb of electricity to raise its potential 1 volt (v). 1 micro farad (uF) = 0.0000001 F.
Can you run UF cable in conduit?
Running UF cable through metal or PVC conduit. Although not commonly done, it is allowable to run UF cable (but NOT NM) cable through metal or PVC conduit in an underground application. Most electricians prefer to fish individual waterproof THWN conductors through conduit, simply because it is easier.
Is UF cable UV resistant?
Outdoor applications require a different type of sheathed cable, known as UF cable, because of its ability to resist breaking down from exposure to ultra violet light and other outdoor and environmental factors.
Can I use UF instead of NM?
UF electrical wire is perfectly suitable for most NM-B applications, though it is unnecessary to use it because it is too expensive for indoor applications.
How deep should UF cable be buried?
Bury UF cables 24 inches below the soil surface, and 18 inches deep when protected by 2 inches of concrete. For all other applications, the burial depth is the same as specified for conduits, except that conduits are required for UF cables in 2 inches of solid rock.
What is URD wire?
Underground residential distribution wire (URD) is a specialty aluminum wire intended for use in residential construction and light to medium duty commercial applications. This durable wire is often the go-to solution to deliver power from a pad-mounted transformer to the service entry or meter of a given structure.
Can I run Romex under a deck?
The Wire. We have discussed Romex wires quite a bit in our blog, but it is important to note here that you can’t just run Romex wire when running electrical wire under outdoor decks. Yes, it’s economical and is a nonmetallic wire, but Romex isn’t suitable for outside use.
Can I put Romex in conduit?
Running Romex in a Conduit When using any non metallic wire outdoor, including Romex, it is a good idea to run it through a conduit. Yes, they can be used outdoors, it is better to be safe than sorry. We recommend using a conduit when running the wire underground.