UF-B cable is what is used when you are running underground circuits to a garage or shed, or when you are running power to a yard light or other landscape feature. 2. Installation Guidelines for Non-Metallic-Sheathed Cable (Romex) Note: Number 14 is missing a number 1. Nonmetallic sheathed cable is constructed of insulated conductors (14 to 2 AWG copper), and an outer nonmetallic sheath classified as Types NMD90, NMW and NMWU. Its popularity stems from the fact that NM cable is very easy to use and fairly inexpensive when compared to other methods of running wire, such as metal conduit or armored cable. If your house was built (or rewired) after about 1965, it is likely that most of its wiring system consists of NM (non-metallic) sheathed cable. There are differing beliefs about what the paper does, but a common suggestion is that it keeps the wires from sticking to the sheathing, making it easier to bend the cable. … New Market Research Report on Global Non-Metallic Sheathed Cable Market Professional Survey 2019 by Manufacturers, Regions, Types and Applications, Forecast to 2024 Market with 142 pages and price US $ 2600 is added by ARCognizance. Underground Feeder Cable (UF-B). Shop NM Non-Metallic Sheathed Cables at Cesco.com. If the cable is “two-wire” cable, it has two insulated wires one black and one white and one bare copper ground wire. Something like a loose wire, a fault in a power tool or appliance, or even a surge in the electrical system. Also Known NON-METALLIC SHEATED CABLE A. non-metallic sheathed cable is an assembly of 2 or more insulated … Uses for Three Types of Non-Metallic Cable Building Cable (NM-B). That’s for safety. Article 334 of the Code® should be consulted for the complete list and/or exceptions. The designation is slightly misleading, however, as both two-wire and three-wire cables also contain an additional bare-copper grounding wire. Cable with 10-gauge wires has orange sheathing (used for 30-amp circuits). Here are some of the common labels written on wires. The coating on NMC cable is non-conducting, flame-resistant and moisture-resistant. A non-metallic-sheathed cable… A cable labeled "12/3 W/G" has three 12-gauge conductors plus ground. Timothy Thiele is an electrician who advises residential DIYers on how to make home installation projects safe and easy. This NMC or non-metallic-sheathed cable electrical wire was observed in a 1974 Edina MN townhouse and was connected to an FPE electrical panel. First, we should understand what a cable is? On occasion we receive a specific question about installing Nonmetallic-Sheathed Cable [NM-B] in wet and damp locations. Note: For concealed work, non metallic- sheathed cable should be installed for its protection from physical damage often caused by nails or screws. The Spruce uses cookies to provide you with a great user experience. Non-Metallic Sheathed Wire, Non-metallic sheathed cable, also called NM cable or Romex. Nonmetallic sheathed cable is manufactured in the following types: i. Nonmetallic sheathed cable is provided with bare bonding conductor. Romex is one popular brand of NM electrical cable. While the ground isn’t counted in the name, it has an important job: it provides a safe path for electricity to follow if something goes wrong with the circuit. NON- METALLIC CABLE FOR DRY LOCATION (NM) Shall be permitted as follows: 1. It is an electrical wire which supplies the current from end to end user. All of the ground wires in a system connect to the home’s main service panel and ultimately to the earth, where the errant electricity is a dump. Global Non Metallic Sheathed Cable Market: Type Segment Analysis Flexible sheathed cable is easier to run through holes in studs than metallic sheathed cable, it is also cheaper. A cable labeled "14/3 W/G" has three 14-gauge conductors plus ground. BX is contrasted with a newer cable, NM, which stands for "non-metallic." For example, indoor electrical wiring is normally done using NM sheathed cable, which stands for Non Metallic. Today, NM cable is the standard for nearly all applications—other than in exposed locations such as against basement walls or along exposed exterior walls, where conduit is still the standard. To be installed in air voids in masonry block or tile walls. NEC sec 300.4A-2 3. NONMETALLIC. Suitable for direct burial, underground service entrance cable. Sunlight resistant. Inside the sheath are two or more insulated wires and usually a ground wire. The coating on NMC cable is non-conducting, flame-resistant and moisture-resistant. This cable is approved for use in dry locations only; you will never see it used in outdoor locations or buried beneath the ground. At one point, all NM cable used white sheathing, but the NM-B cable sold today has a color-coded outer sheathing to serve as a quick identification for the wire gauge of the cable. Non-Metallic Sheathed Wire, Non-metallic sheathed cable, also called NM cable or Romex. Installation of Nonmetallic Sheathed Cable, Exposed or in a Raceway. Introducing "One Thing": A New Video Series. NEC sec. Use of Type NM cable is restricted to dry locations where as Type NMC can be used in … The power conductors are insulated with PVC or XLPE. NON-METALLIC SHEATED CABLE Definition:Nonmet allic-sheathed (plastic) is a type of covered electrical wire consisting of at least two insulated conductors and one bare conductor used in residential wiring. Cable with 12-gauge wires has yellow sheathing (used for 20-amp circuits). Known as UF-B cable, this underground feeder cable features wire conductors that are embedded in solid plastic rather than a hollow sheathing; the cable color is typically gray. Otherwise, it’s hidden behind the drywall or other surface material. Non-Metallic Sheathed Cables, the most common product under the heading of Building Wire, is known as NMD90 and NMWU. These cables are of various types and are used for different applications. SHEATED CABLE. Standard NM cable also has a wrapping of paper inside the sheathing. 300-4B-2 4. Article 330 Metal-Clad Cable Type MC; Article 332 Mineral-Insulated, Metal-Sheathed Cable Type MI; Article 334 Nonmetallic-Sheathed Cable Types NM, NMC, and NMS; Article 336 Power and Control Tray Cable Type TC; Article 338 Service-Entrance Cable Types SE and USE; Article 340 Underground Feeder and Branch-Circuit Cable Type UF Your email address will not be published. Non-metallic sheathed cable is constructed of insulated conductors (14 to 2 AWG Copper or 12 to 2 AWG Aluminum or Copperclad Aluminum), and an outer non-metallic sheath classified as Type NM or Type NMC. For both exposed and concealed work in normally dry locations. The standard non-metallic-sheathed cable used for internal work in dry locations is Type Non-metallic-sheathed (NM) - B cable. Code Change Summary: A clarification was made to restrict the use of nonmetallic sheathed cables “where prohibited by 334.12”.