May. 27, 2024
Armor-Clad (AC) Cable: AC cable includes THHN-insulated conductors with 16-gauge aluminum bond wire placed inside the armor to act as a grounding conductor.
Automotive Cable: This is a general-purpose thermoplastic (GPT) wire, also referred to as primary wire. Normal applications are within motor vehicles with limited exposure to fluids, physical wear and abuse.
Bayonet Neill-Concelman (BNC) Cable: BNC cables are small, quick-connect/disconnect radio frequency connectors used for coaxial cables.
Category Cable: This is used for systems and data networking systems. Cat 5e is the most common variety of category cable that&#;s used for computer networking on internet service installations. The conductor pairs are twisted together to prevent cross-talk and interference from other paired conductors in the cable, as well as external interference. The higher the megahertz (MHz) capability, the more twists per foot.
Coaxial Cable: This is a metallic cable that carries television and video signals. It connects to video equipment and features a central conductor with a dielectric insulator, metallic shield and plastic jacket.
Doorbell Wire: Doorbell wire is used to connect a wired doorbell or video doorbell to a home&#;s electrical system. 18-gauge wire is the variety most often used.
Dual Armored Cable: This is a durable cable that offers protection without employing electrical conduit, elbows, offsets (which can be expensive) or conduit couplings. For areas where the cable may be exposed to moisture, metal-clad armor prevents corrosion.
Flexible Cord: Typically used for industrial machinery, washing machines and large appliances, portable tools, equipment, and extension or power cords, flexible/power cord has its own naming convention based on a letter code, with a common option being SJEOOW.
Lamp Cord: Used with lamps, small appliances, radios and other similar products that don&#;t exceed 300 volts, lamp cord is available between 18- and 12-gauge sizes in a variety of colors.
Landscape Lighting Low-Voltage (LV) Cable: This underground cable is suitable for outdoor accent lighting, landscape lighting and security lighting. Applications shouldn&#;t exceed 150 volts. It&#;s used for direct burial, is suitable for sunlight and is available between 16- and 8-gauge sizes.
Metal-Clad (MC) Cable: MC cable is used heavily in commercial electrical work, for running through concrete or in other commercial environments. Individual THHN wire conductors are run through an aluminum interlocked armor. It includes a grounding wire.
Mobile Home Feeder: This connects a mobile home to a supply of electricity where permanent wiring is required, and it&#;s suitable for direct burial and underground service entrance cable. It includes four RHH or RHW-2 conductors, with a white stripe for neutral and a green ground conductor. It&#;s sunlight-resistant.
Network and Data Cable: This comes in three types &#; fiber-optic, twisted-pair and coaxial cable &#; and is used to connect multiple networking devices or computers in a network.
NM-B: This is a non-metallic sheathed cable that&#;s used as a residential building wire for branch circuits for outlets, lighting and other residential applications. NM-B is available between 14 AWG and 6 AWG with two or three conductors.
Preassembled Whips: These are pre-cut lengths of armored cable designed to increase jobsite productivity. Assembly comes with pre-stripped THHN conductors and pre-installed zinc die-cast, snap-in fittings.
Residential Grounding Wire: This is bare copper wire that&#;s available in 4-, 6- and 8-gauge solid and stranded construction. It&#;s used to ground the residential electrical system, usually at the meter before it enters the dwelling. It&#;s also used for grounding the perimeter surface around pools.
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Service Entrance Cable: This includes individual conductors rated XHHW-2 or THHN/THWN and feeds power from a main breaker to a subpanel. It can be exposed to direct sunlight and used in wet or dry locations.
Speaker Wire: Made of copper and designed to transport a low-voltage electrical current, speaker wire has a variety of wiring uses, including doorbells, thermostats, home security sensors, landscape lighting and other low-current systems.
Sprinkler Wire: Multi-conductor sprinkler wire is suitable for direct burial on applications up to 30 volts. It&#;s used in central controls for underground sprinkler systems and is available in 18-gauge construction with up to 25 conductors.
Submersible Pump Cable: This includes THWN copper conductors that are heat-, moisture-, oil- and gasoline-resistant. It&#;s suitable for temperatures below 75 degrees Celsius with two or three conductors. It&#;s used for power and circuits for submersible pump systems.
Thermostat Wire: Used in heating and air conditioning systems, along with bell and alarm systems, thermostat wire is available in 20- or 18-gauge sizes with up to 10 conductors.
Underground (UF-B) Wire: A copper wire used for underground purposes, including direct burial, it comes in a gray jacket and can be used for deck lighting, outdoor water features, landscape lighting and air conditioner compressors.
Underground Residential Distribution (URD) Cable: Used for secondary distribution and underground service applications at 600 volts or less, it&#;s suitable for direct burial or placement in ducts. It&#;s acceptable in wet locations in triplex or quadruplex. Conductors are stranded, compressed aluminum. The neutral conductor has a yellow, triple-extruded stripe.
Electrical wire is typically made of copper or aluminum, and these conductive materials are insulated as wires that bring electricity to various parts of your home. When you're installing new wiring, choosing the right wire or cable is half the battle.
When examining the old wiring in your home, identifying the wire type can tell you a lot about the circuit the wiring belongs to (for example, if you open a junction box and need to determine which wires go where). Wiring for modern homes is quite standard, and most homes built after the mid-s have similar types of wiring.
Below, learn the different types of home electrical wires to choose the right option for completing electrical projects accurately and safely.
Once you identify your houses wiring type, don't try to imitate it before consulting your local building codes. Any new electrical installation requires new wiring that conforms to local building codes.
Wiring Terminology
It helps to understand a few basic terms used to describe wiring. An electrical wire is a type of conductor, which is a material that conducts electricity. In the case of household wiring, the conductor itself is usually copper or aluminum (or copper-sheathed aluminum) and is either a solid metal conductor or stranded wire.
Most wires in a home are insulated, meaning they are wrapped in a nonconductive plastic coating. One notable exception is ground wires, which are typically solid copper and are either insulated with green sheathing or uninsulated (bare).
Many larger wires in your home carry 120- to 240-volt circuit voltage, often referred to as line voltage, and they can be very dangerous to touch. Several wires in your home carry much lesser amounts of "low-voltage" current. These are less dangerous, and with some, the voltage carried is so low that there is virtually no chance of shock. However, until you know exactly what kind of wires you are dealing with, it's best to treat them all as dangerous.
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