NM cable, or Non-Metallic Sheathed cable, is a type of electrical wiring commonly used in residential buildings. It consists of two or more insulated conductors and a bare ground wire, all encased in a flexible plastic sheath. This design makes it lightweight and easy to install, making it a popular choice for electricians. NM cable is typically used for indoor wiring, such as in walls and ceilings, and is suitable for various applications, including lighting and outlets. It is important to follow local building codes and regulations when using NM cable to ensure safety and compliance.