Amprobe-Earth-tester-Telaris-earth-resistance-tester-Amprobe-EARTH-TESTER-The-Telaris-Earth-Test-can-test-the-ability-of-soil-&-grounding-connection-to-conduct-electricity-&-provide-an-electrical-reference-point-Good-soil-conductivity-is-needed-to-limit-static-electricity-charge-in-potentially-flammable-situations-&-minimize-the-voltage-difference-between-power-return-&-earth-ground-for-personal-safety-Resistance-testing-is-done-by-2-wire-3-wire-or-4-wire-testing-methods-Amprobe-Ea