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Which material is commonly used to support heavy electrical loads in residential wiring?

  1. Aluminum

  2. Copper

  3. Steel

  4. Plastic

The correct answer is: Copper

Copper is commonly used to support heavy electrical loads in residential wiring due to its excellent electrical conductivity and mechanical strength. It has a lower electrical resistance compared to other materials, allowing electricity to flow more efficiently and reducing the risk of overheating and energy loss. This makes copper particularly suitable for higher current applications, ensuring safety and reliability in residential electrical systems. Additionally, copper's durability means it can withstand the physical stresses involved in wiring installations, contributing to its preference for heavy loads in homes.