Which type of wiring system is commonly used in residential buildings?

The use of NM cable, or non-metallic sheath cable, is prevalent in residential wiring due to its specific design and practical benefits. NM cable typically consists of two or more insulated conductors and a bare ground wire, all encased in a flexible plastic sheath. This construction makes it suitable for indoor applications where moisture and environmental factors are less of a concern.

NM cable is lightweight, easy to work with, and cost-effective, making it ideal for residential construction where the wiring needs to navigate between different rooms and levels. Its non-metallic sheath provides a degree of protection against physical damage while ensuring that the wiring remains easy to install in walls, ceilings, and floors.

In contrast, other options such as iron cable are generally not used in residential settings due to their rigidity and susceptibility to corrosion. Nuclear cable is not a standard term in electrical wiring; it may refer to cables used in specific, specialized environments pertaining to nuclear applications, which are not applicable in typical residential contexts. Fiber optic cable, while excellent for high-speed data transmission, is not suited for power distribution in homes and is usually used for telecommunications and internet connections rather than electrical power.

Thus, NM cable stands out as the best option for standard residential wiring, offering a combination of safety