According to the National Electric Code, how should electrical wires be installed?

The correct response is grounded in the practices outlined by the National Electric Code (NEC), which sets standards for safe electrical installations. Electrical wires should be installed in approved junction boxes to provide a safe and accessible point for making electrical connections or transitions. This practice not only enhances safety, by protecting connections from environmental factors, but also ensures compliance with electrical code requirements.

Additionally, the use of non-metallic grey pipe, commonly known as PVC conduit, is supported for specific applications because it is resistant to corrosion, lightweight, and easy to handle. The combination of junction boxes and approved conduit facilitates proper wiring techniques that safeguard against electrical hazards such as shorts or fires.

This method stands in contrast to alternatives like using outdated materials, which do not meet current safety and efficiency standards, or laying wires flat on the ground, which exposes them to physical damage and does not provide the necessary protection as dictated by safety codes. Hence, the answer highlights a standard practice that aligns with current safety regulations.