Which EMI prevention method involves connecting conductors to a common point to reduce stray voltage?

Which EMI prevention method involves connecting conductors to a common point to reduce stray voltage?

• A. Grounding
• B. Bonding
• C. Shielding
• D. Filter

Answer: (A)

Grounding establishes a common reference to earth for all conductors, providing a low-impedance path for stray or fault currents. By tying equipment and conductors to this earth point, any unwanted currents are diverted away and surface potentials are kept near earth, which minimizes voltage differences between conductive parts. That reduction in stray voltage helps suppress EMI effects. Shielding blocks interference with a conductive barrier, and filtering attenuates noise in circuits; bonding connects metallic parts to each other to keep them at the same potential, but grounding specifically creates the earth reference that many EMI problems rely on.

Grounding establishes a common reference to earth for all conductors, providing a low-impedance path for stray or fault currents. By tying equipment and conductors to this earth point, any unwanted currents are diverted away and surface potentials are kept near earth, which minimizes voltage differences between conductive parts. That reduction in stray voltage helps suppress EMI effects. Shielding blocks interference with a conductive barrier, and filtering attenuates noise in circuits; bonding connects metallic parts to each other to keep them at the same potential, but grounding specifically creates the earth reference that many EMI problems rely on.