Question T0B08
From subelement T0 - T0B
Which is a proper grounding method for a tower?
Why is this correct?
Option D is correct because separate eight-foot ground rods for each tower leg, bonded together, provides multiple paths to earth ground, reducing ground resistance and improving lightning protection. A single four-foot rod (A) is insufficient for tower grounding. RF chokes (B) don't provide grounding paths. Water pipes (C) are unreliable and potentially unsafe for lightning protection.
Memory tip
Look for grounding methods that emphasize redundancy and low resistance. Multiple ground rods always outperform single rods because they create parallel paths to earth. The 'bonded together' phrase is key - it ensures all paths work as one unified system.
Learn more
Proper tower grounding follows electrical codes requiring robust lightning protection systems. Eight-foot rods reach below the frost line and into more conductive soil layers. Multiple rods per tower leg create redundant paths, essential because lightning seeks the lowest impedance route to earth. This configuration protects both equipment and structures by providing lightning energy multiple direct paths rather than forcing it through your station's grounding system or building's electrical system.
Think about it
Why do you think bonding all the ground rods together is just as important as having multiple rods in the first place?