What kind of electrical wire is typically used for residential wiring?

Copper wire is typically used for residential wiring due to its excellent conductivity properties, which allow for efficient transmission of electricity with minimal energy loss. The high conductivity of copper means that it can carry a significant amount of electrical current safely. Additionally, copper is resistant to corrosion, which enhances its durability and longevity in various environments commonly found in residential settings.

While other materials, such as aluminum wire, are sometimes used, especially in larger installations due to their lighter weight and lower cost, they have drawbacks like higher electrical resistance and vulnerability to overheating if not sized correctly. Steel wire is generally not used for electrical wiring in homes; instead, it is commonly used in applications such as structural components. Lead wire is not suitable for wiring due to toxicity and is not approved for electrical installations, making copper the preferred choice for safe and reliable residential electrical systems.