Ground resistance testers, also known as earth ground testers, are critical tools for protecting electrical facilities from the dangerous effects of a lightning strike or utility overvoltage. Grounded electrical systems prevent electrical failure or possible danger by ensuring that in the event of a surge of electricity, the current will find a safe path to earth.
Maintaining an effective earth system is also essential in managing a telecommunications system. To ensure this connection remains reliable, the International Electrical Testing Association requires ground electrode testing every three years. These devices are used by electrical contractors, power utilities, REAs, telephone and CATV technicians, and inspectors who need to determine whether grounding complies with NEC, OSHA, and other standards.
ATEC offers affordable ground resistance tester rental and earth ground tester rental rates for products from leading manufacturers such as Fluke, AEMC, and Megger.
How to Use a Ground Resistance Tester
This guide is based on the Megger DET2/3
and the earth/ground test. Instructions may vary based on model or intended use.
- Power the machine on.
- Set up test leads and stakes as required by chosen test; do not connect them yet.
- Set test function (4-Pole or 3-Pole).
- Set test mode (manual or continuous).
- Place stakes in the ground.
- Connect test leads and set parameters (voltage, frequency, and/or noise).
- Start the test by pressing the TEST button.
- Once the test has completed, save your resistance data or repeat the test.
For more detailed instructions and safety procedures, please read your equipment's user guide.