Where should a yellow insulated copper tracer wire be installed in relation to underground nonmetallic gas piping?

The installation of a yellow insulated copper tracer wire adjacent to underground nonmetallic gas piping is essential for locating and identifying the gas lines during excavation or repair work. This yellow wire serves as a visual and detectable signal for utility locating services.

When installed adjacent to the piping, the tracer wire creates a consistent and accessible reference point for locating the pipeline without interference. Proper spacing and orientation help prevent any accidental damage to the piping during work or digging.

In this context, other positioning options such as above or below the piping could result in less reliable detection or could risk the integrity of the gas piping itself, making adjacent placement the most logical and safe choice for effective utility tracking.