How is RF grounding and bonding typically ensured in RAWS installations?

• A. Bond only conductive components and ensure a high impedance path to earth.
• B. Bond all conductive components and ensure low impedance path to earth per standards.
• C. Isolate all components from ground to reduce interference.
• D. Ground to a separate building foundation.

Answer: (B)

The idea being tested is that RF grounding and bonding in RAWS installations must create a single, low-impedance path to earth for all conductive parts. Bonding all conductive components—cabinets, antennas, feedlines, racks, mounting hardware, conduit, grounding conductors, and any structural metal—ensures they are at the same electrical potential. This minimizes voltage differences between components, which reduces RF interference and protects personnel and equipment from stray currents during faults or lightning surges.

A low impedance path to earth is essential because it allows fault and lightning currents to return to ground safely and quickly, rather than finding alternate, unpredictable routes that can cause EMI, equipment damage, or shock hazards. Keeping the ground path high impedance or isolating elements from the grounding system defeats this safety and performance goal, increasing risk and noise.

Using a unified grounding approach across the entire installation aligns with standard requirements, rather than bonding only some parts or using separate foundations, which would create potential differences and compromises in protection and performance.