Explore the five most common electrical cables: Non-Metallic Sheathed, Armored, Underground Feeder, Metal-Clad, and Coaxial cables.
The Five Most Common Types of Electrical Cables
Electrical cables are crucial in transmitting electric power and signals. Different types of cables are used for various applications, considering factors like voltage levels, environmental conditions, and signal types. Let’s delve into the five most common types of electrical cables.
1. Non-Metallic Sheathed Cable (NM)
Commonly referred to as ROMEX®, this is the most prevalent type of electrical cable used in residential wiring. The NM cable typically consists of a couple of insulated conductors enveloped by a plastic sheath. It’s designed for dry, interior applications.
2. Armored Cable (AC)
The Armored Cable, or BX, is another widely used cable type, featuring a flexible metal sheath that houses the conductors. This metal armor provides an added layer of protection, making it suitable for exposed installations.
3. Underground Feeder Cable (UF)
For outdoor and underground applications, the UF cable is the go-to option. It’s similar to NM cable but is more robust and waterproof, thanks to its thick plastic sheathing.
4. Metal-Clad Cable (MC)
This type of cable is similar to AC but has a green insulated grounding wire. It’s used in commercial buildings and other applications that require additional protection.
5. Coaxial Cable
Coaxial cables are designed to carry high-frequency electrical signals with minimal losses. They are commonly used in TV and internet connections, featuring a central conductor surrounded by an insulating layer, a conductive shield, and an outer insulating layer.
In conclusion, the type of electrical cable to be used depends significantly on the application, whether it’s for residential, commercial, underground, or high-frequency signal transmission. It’s crucial to understand the different types of cables to ensure the electrical system’s safety and efficiency.
