What is the purpose of a tracer wire at a service riser?

The purpose of a tracer wire at a service riser is to identify the location of underground pipelines. This wire is typically installed alongside underground utility lines, such as gas and water pipes, to facilitate the detection and location of these lines by utility workers. When utilities need to dig or perform maintenance, they often rely on tools that can detect the electromagnetic signals emitted by tracer wires, allowing them to pinpoint the exact location of buried pipelines. This is particularly important for preventing accidental damage during excavation and ensuring safety in the vicinity of buried utilities.

While other options may involve important safety measures (pressure measurement, temperature regulation, or gas leak signaling), they are not relevant to the function of tracer wire, which specifically addresses the need for accurate location identification of underground installations.