The 3-line application of the CDNE method is aimed at testing both conducted emissions along the mains supply and the disturbances present in multiple lines of the equipment. This approach is used in more complex scenarios where all three-phase lines or power lines of the EUT need to be tested. By utilizing the CDNE method across these lines, it provides a more comprehensive assessment of disturbances being conducted along the various power lines, replacing the need for extensive radiated emission tests. The method ensures compliance with stricter limits on impedance and phase angle, providing reliable results for multi-line equipment and ensuring consistent performance across all phases of the equipment under test. Additionally, the EUT’s mains cable is terminated with a CDNE on a reference-ground plane, and the receiver port is terminated with a 50 Ω impedance to ensure accurate measurements across all lines. This is critical for lighting equipment operating in diverse electrical environments, ensuring it meets stringent EMC standards.