New test leads must be installed where?

The requirement for new test leads to be installed on a clean surface is critical in ensuring accurate measurements when monitoring corrosion or conducting tests on pipelines. A clean surface minimizes the risk of contaminants affecting the electrical connection and measurement readings. Corrosion evaluations and cathodic protection assessments rely on precise data; any dirt, paint, or corrosion products can interfere with the electrical continuity necessary for effective testing.

While considerations regarding grade level and sealing are important in other contexts, they do not address the fundamental need for clean surfaces that ensure consistency and reliability in testing. Therefore, choosing to install new test leads on a clean surface directly supports the integrity and validity of corrosion monitoring efforts.