Where should the PFC test be conducted during an initial verification?

The Power Factor Correction (PFC) test is conducted at the origin of the installation, which is essential for accurately assessing the electrical system's performance and ensuring compliance with safety standards. Conducting the test at this point provides a comprehensive view of the entire system's impedance and allows for the assessment of all protective devices in their original condition. This step is crucial in verifying that the installation can handle the expected load conditions safely.

Performing the test at the main service panel or other downstream locations, such as at the distribution board or final circuit, might not yield results that reflect the true operational characteristics of the entire installation. These points may not account for factors such as voltage drops or impedance introduced by circuit design, which can misrepresent the electrical characteristics being tested. Thus, starting at the origin ensures that the evaluation encompasses the total impact of the installation on the electrical supply.