What type of clamp is used to connect ground wire to ground rod?

• A. Acorn Clamp
• B. C-Clamp
• C. F-Clamp
• D. Wire Clamp

Answer: (A)

Grounding relies on a secure, low-resistance connection between the grounding conductor and the ground rod. An acorn clamp is specifically designed for this job: it fits around the round surface of the ground rod and uses a set screw to bite into the rod while holding the grounding conductor in place. This creates a reliable electrical path from the building’s ground system to the earth. The other clamps are general-purpose tools not intended for attaching a wire to a ground rod, so they don’t provide the proper secure connection required for grounding.