What is the purpose of identifying and isolating before testing?

Identifying and isolating a circuit or electrical system before testing is primarily aimed at ensuring safety. This step is critical for protecting not only the technicians conducting the tests but also any nearby workers and the equipment itself. By isolating the system, you eliminate the risk of accidental contact with live components, which could lead to electric shock or other injuries.

Identifying the correct circuit to be tested also ensures that the technician is working on the intended system and is aware of the potential hazards associated with it. This practice adheres to safety protocols and standards in the electrical industry, which prioritize minimizing risks associated with electrical work. While enhancing performance, increasing efficiency, and reducing costs are important considerations in maintenance and operation, the primary focus during testing is to maintain a safe working environment.