Grounding clamps must be sized to meet or exceed what criterion?

• A. Must be sized to meet or exceed the current carrying capacity of the cable.
• B. Must be installed on all conductors regardless of current.
• C. Must be color-coded blue.
• D. Must be tightened to 100 N-m.

Answer: (A)

Grounding clamps are part of the conductive path to earth, so they must be able to carry the same current as the conductor they are attached to. If the clamp is undersized, it can overheat during fault conditions, raise the impedance of the grounding path, and compromise safety and equipment protection. Matching or exceeding the cable’s ampacity ensures the clamp and joint won’t become a bottleneck or failure point, preserving a reliable, low-impedance path to ground.

Color or universal installation requirements don’t determine safety here; those are not indicators of a clamp’s ability to carry current. Likewise, a fixed torque value isn’t universally correct because the proper torque depends on the specific clamp design and conductor size, and must follow the manufacturer’s specifications to avoid damaging the clamp or insulation while ensuring a solid electrical connection.