What device is used to ensure that grounding is effective?

The device used to ensure that grounding is effective is a ground resistance tester. This specialized instrument measures the resistance of grounding systems, which is crucial for ensuring that electrical systems are properly grounded for safety and performance. A low resistance reading indicates a good grounding connection, while a high resistance reading suggests potential issues that could lead to electrical malfunctions or hazards.

In the context of telecommunications and tower installations, effective grounding protects both equipment and personnel from electrical surges, lightning strikes, and prevents unwanted noise that can disrupt signal quality.

Other choices do not serve the purpose of verifying grounding effectiveness. A cable tester checks the integrity of communication cables, a clamper is a circuit component used to modify voltage levels, and a signal booster enhances weak signals but does not measure or assess grounding systems.